2205 lines
95 KiB
Plaintext
2205 lines
95 KiB
Plaintext
GStreamer 1.18 Release Notes
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GStreamer 1.18.0 was originally released on 7 September 2020.
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See https://gstreamer.freedesktop.org/releases/1.18/ for the latest
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version of this document.
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Last updated: Monday 7 September 2020, 10:30 UTC (log)
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Introduction
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The GStreamer team is proud to announce a new major feature release in
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the stable 1.x API series of your favourite cross-platform multimedia
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framework!
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As always, this release is again packed with many new features, bug
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fixes and other improvements.
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Highlights
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- GstTranscoder: new high level API for applications to transcode
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media files from one format to another
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- High Dynamic Range (HDR) video information representation and
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signalling enhancements
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- Instant playback rate change support
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- Active Format Description (AFD) and Bar Data support
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- ONVIF trick modes support in both GStreamer RTSP server and client
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- Hardware-accelerated video decoding on Windows via DXVA2 /
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Direct3D11
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- Microsoft Media Foundation plugin for video capture and
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hardware-accelerated video encoding on Windows
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- qmlgloverlay: New overlay element that renders a QtQuick scene over
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the top of an input video stream
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- New imagesequencesrc element to easily create a video stream from a
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sequence of jpeg or png images
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- dashsink: Add new sink to produce DASH content
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- dvbsubenc: DVB Subtitle encoder element
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- TV broadcast compliant MPEG-TS muxing with constant bitrate muxing
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and SCTE-35 support
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- rtmp2: new RTMP client source and sink element implementation
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- svthevcenc: new SVT-HEVC-based H.265 video encoder
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- vaapioverlay compositor element using VA-API
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- rtpmanager support for Google’s Transport-Wide Congestion Control
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(twcc) RTP extension
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- splitmuxsink and splitmuxsrc gained support for auxiliary video
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streams
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- webrtcbin now contains some initial support for renegotiation
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involving stream addition and removal
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- New RTP source and sink elements to easily set up RTP streaming via
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rtp:// URIs
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- New Audio Video Transport Protocol (AVTP) plugin for Time-Sensitive
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Applications
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- Support for the Video Services Forum’s Reliable Internet Stream
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Transport (RIST) TR-06-1 Simple Profile
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- Universal Windows Platform (UWP) support
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- rpicamsrc element for capturing from the Raspberry Pi camera
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- RTSP Server TCP interleaved backpressure handling improvements as
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well as support for Scale/Speed headers
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- GStreamer Editing Services gained support for nested timelines,
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per-clip speed rate control and the OpenTimelineIO format.
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- Autotools build system has been removed in favour of Meson
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Major new features and changes
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Noteworthy new features and API
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Instant playback rate changes
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Changing the playback rate as quickly as possible so far always required
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a flushing seek. This generally works, but has the disadvantage of
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flushing all data from the playback pipeline and requiring the demuxer
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or parser to do a full-blown seek including resetting its internal state
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and resetting the position of the data source. It might also require
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considerable decoding effort to get to the right position to resume
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playback from at the higher rate.
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This release adds a new mechanism to achieve quasi-instant rate changes
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in certain playback pipelines without interrupting the flow of data in
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the pipeline. This is activated by sending a seek with the
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GST_SEEK_FLAG_INSTANT_RATE_CHANGE flag and start_type = stop_type =
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GST_SEEK_TYPE_NONE. This flag does not work for all pipelines, in which
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case it is necessary to fall back to sending a full flushing seek to
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change the playback rate. When using this flag, the seek event is only
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allowed to change the current rate and can modify the trickmode flags
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(e.g. keyframe only or not), but it is not possible to change the
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current playback position, playback direction or do a flush.
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This is particularly useful for streaming use cases like HLS or DASH
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where the streaming download should not be interrupted when changing
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rate.
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Instant rate changing is handled in the pipeline in a specific sequence
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which is detailed in the seeking design docs. Most elements don’t need
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to worry about this, only elements that sync to the clock need some
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special handling which is implemented in the GstBaseSink base class, so
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should be taken care of automatically in most normal playback pipelines
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and sink elements.
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See Jan’s GStreamer Conference 2019 talk “Changing Playback Rate
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Instantly” for more information.
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You can try this feature by passing the -i command line option to
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gst-play-1.0. It is supported at least by qtdemux, tsdemux, hlsdemux,
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and dashdemux.
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Google Transport-Wide Congestion Control
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rtpmanager now supports the parsing and generating of RTCP messages for
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the Google Transport-Wide Congestion Control RTP Extension, as described
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in:
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https://tools.ietf.org/html/draft-holmer-rmcat-transport-wide-cc-extensions-01.
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This “just” provides the required plumbing/infrastructure, it does not
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actually make effect any actual congestion control on the sender side,
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but rather provides information for applications to use to make such
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decisions.
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See Håvard’s “Google Transport-Wide Congestion Control” talk for more
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information about this feature.
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GstTranscoder: a new high-level transcoding API for applications
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The new GstTranscoder library, along with transcodebin and
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uritranscodebin elements, provides high level API for applications to
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transcode media files from one format to another. Watch Thibault’s talk
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“GstTranscoder: A High Level API to Quickly Implement Transcoding
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Capabilities in your Applications” for more information.
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This also comes with a gst-transcoder-1.0 command line utility to
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transcode one URI into another URI based on the specified encoding
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profile.
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Active Format Description (AFD) and Bar Data support
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The GstVideo Ancillary Data API has gained support for Active Format
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Description (AFD) and Bar data.
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This includes various two new buffer metas: GstVideoAFDMeta and
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GstVideoBarMeta.
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GStreamer now also parses and extracts AFD/Bar data in the h264/h265
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video parsers, and supports both capturing them and outputting them in
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the decklink elements. See Aaron’s lightning talk at the GStreamer
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Conference for more background.
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ONVIF trick modes support in both GStreamer RTSP server and client
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- Support for the various trick modes described in section 6 of the
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ONVIF streaming spec has been implemented in both gst-rtsp-server
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and rtspsrc.
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- Various new properties in rtspsrc must be set to take advantage of
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the ONVIF support
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- Examples are available here: test-onvif-server.c and
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test-onvif-client.c
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- Watch Mathieu Duponchelle’s talk “Implementing a Trickmode Player
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with ONVIF, RTSP and GStreamer” for more information and a live
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demo.
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GStreamer Codecs library with decoder base classes
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This introduces a new library in gst-plugins-bad which contains a set of
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base classes that handle bitstream parsing and state tracking for the
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purpose of decoding different codecs. Currently H264, H265, VP8 and VP9
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are supported. These bases classes are meant primarily for internal use
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in GStreamer and are used in various decoder elements in connection with
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low level decoding APIs like DXVA, NVDEC, VAAPI and V4L2 State Less
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decoders. The new library is named gstreamer-codecs-1.0 /
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libgstcodecs-1.0 and is not yet guaranteed to be API stable across major
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versions.
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MPEG-TS muxing improvements
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The GStreamer MPEG-TS muxer has seen major improvements on various
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fronts in this cycle:
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- It has been ported to the GstAggregator base class which means it
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can work in defined-latency mode with live input sources and
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continue streaming if one of the inputs stops producing data.
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- atscmux, a new ATSC-specific tsmux subclass
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- Constant Bit Rate (CBR) muxing support via the new bitrate property
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which allows setting the target bitrate in bps. If this is set the
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muxer will insert null packets as padding to achieve the desired
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multiplex-wide constant bitrate.
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- compliance fixes for TV broadcasting use cases (esp. ATSC). See
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Jan’s talk “TV Broadcast compliant MPEG-TS” for details.
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- Streams can now be added and removed at runtime: Until now, any
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streams in tsmux had to be present when the element started
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outputting its first buffer. Now they can appear at any point during
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the stream, or even disappear and reappear later using the same PID.
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- new pcr-interval property allows applications to configure the
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desired interval instead of hardcoding it
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- basic SCTE-35 support. This is enabled by setting the scte-35-pid
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property on the muxer. Sending SCTE-35 commands is then done by
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creating the appropriate SCTE-35 GstMpegtsSection and sending them
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on the muxer.
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- MPEG-2 AAC handling improvements
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New elements
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- New qmlgloverlay element for rendering a QtQuick scene over the top
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of a video stream. qmlgloverlay requires that Qt support adopting an
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external OpenGL context and is known to work on X11 and Windows.
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Wayland is known not to work due to limitations within Qt. Check out
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the example to see how it works.
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- The clocksync element is a generic element that can be placed in a
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pipeline to synchronise passing buffers to the clock at that point.
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This is similar to identity sync=true, but because it isn’t
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GstBaseTransform-based, it can process GstBufferLists without
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breaking them into separate GstBuffers. It is also more discoverable
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than the identity option. Note that you do not need to insert this
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element into your pipeline to make GStreamer sync to the pipeline
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clock, this is usually handled automatically by the elements in the
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pipeline (sources and sinks mostly). This element is useful to feed
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non-live input such as local files into elements that expect live
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input such as webrtcbin.`
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- New imagesequencesrc element to easily create a video stream from a
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sequence of JPEG or PNG images (or any other encoding where the type
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can be detected), basically a multifilesrc made specifically for
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image sequences.
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- rpicamsrc element for capturing raw or encoded video (H.264, MJPEG)
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from the Raspberry Pi camera. This works much like the popular
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raspivid command line utility but outputs data nicely timestamped
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and formatted in order to integrate nicely with other GStreamer
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elements. Also comes with a device provider so applications can
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discover the camera if available.
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- aatv and cacatv video filters that transform video ASCII art style
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- avtp: new Audio Video Transport Protocol (AVTP) plugin for Linux.
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See Andre Guedes’ talk “Audio/Video Bridging (AVB) support in
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GStreamer” for more details.
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- clockselect: a pipeline element that enables clock selection/forcing
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via gst-launch pipeline syntax.
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- dashsink: Add new sink to produce DASH content. See Stéphane’s talk
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or blog post for details.
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- dvbsubenc: a DVB subtitle encoder element
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- microdns: a libmicrodns-based mdns device provider to discover RTSP
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cameras on the local network
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- mlaudiosink: new audio sink element for the Magic Leap platform,
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accompanied by an MLSDK implementation in the amc plugin
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- msdkvp9enc: VP9 encoder element for the Intel MediaSDK
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- rist: new plugin implementing support for the Video Services Forum’s
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Reliable Internet Stream Transport (RIST) TR-06-1 Simple Profile.
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See Nicolas’ blog post “GStreamer support for the RIST
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Specification” for more details.
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- rtmp2: new RTMP client source and sink elements with fully
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asynchronous network operations, better robustness and additional
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features such as handling ping and stats messages, and adobe-style
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authentication. The new rtmp2src and rtmp2sink elements should be
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API-compatible with the old rtmpsrc / rtmpsink elements and should
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work as drop-in replacements.
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- new RTP source and sink elements to easily set up RTP streaming via
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rtp:// URIs: The rtpsink and rtpsrc elements add an URI interface so
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that streams can be decoded with decodebin using rtp:// URIs. These
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can be used as follows: ``` gst-launch-1.0 videotestsrc ! x264enc !
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rtph264pay config-interval=3 ! rtpsink uri=rtp://239.1.1.1:1234
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gst-launch-1.0 videotestsrc ! x264enc ! rtph264pay config-interval=1
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! rtpsink uri=rtp://239.1.2.3:5000 gst-launch-1.0 rtpsrc
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uri=rtp://239.1.2.3:5000?encoding-name=H264 ! rtph264depay !
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avdec_h264 ! videoconvert ! xvimagesink
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gst-launch-1.0 videotestsrc ! avenc_mpeg4 ! rtpmp4vpay
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config-interval=1 ! rtpsink uri=rtp://239.1.2.3:5000 gst-launch-1.0
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rtpsrc uri=rtp://239.1.2.3:5000?encoding-name=MP4V-ES ! rtpmp4vdepay
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! avdec_mpeg4 ! videoconvert ! xvimagesink ```
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- svthevcenc: new SVT-HEVC-based H.265 video encoder
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- switchbin: new helper element which chooses between a set of
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processing chains (paths) based on input caps, and changes the
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active chain if new caps arrive. Paths are child objects, which are
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accessed by the GstChildProxy interface. See the switchbin
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documentation for a usage example.
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- vah264dec: new experimental va plugin with an element for H.264
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decoding with VA-API using GStreamer’s new stateless decoder
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infrastructure (see Linux section below).
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- v4l2codecs: introduce an V4L2 CODECs Accelerator supporting the new
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CODECs uAPI in the Linux kernel (see Linux section below)
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- zxing new plugin to detect QR codes and barcodes, based on libzxing
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- also see the Rust plugins section below which contains plenty of new
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exciting plugins written in Rust!
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New element features and additions
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GStreamer core
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- filesink: Add a new “full” buffer mode. Previously the default and
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full modes were the same. Now the default mode is like before: it
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accumulates all buffers in a buffer list until the threshold is
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reached and then writes them all out, potentially in multiple
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writes. The new full mode works by always copying memory to a single
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memory area and writing everything out with a single write once the
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threshold is reached.
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- multiqueue: Add stats property and
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current-level-{buffers, bytes, time} pad properties to query the
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current levels of the corresponding internal queue.
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Plugins Base
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- alsa: implement a device provider
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- alsasrc: added use-driver-timestamp property to force use of
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pipeline timestamps (and disable driver timestamps) if so desired
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- audioconvert: fix changing the mix-matrix property at runtime
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- appsrc: added support for segment forwarding or custom GstSegments
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via GstSample, enabled via the handle-segment-change property. This
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only works for segments in TIME format for now.
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- compositor: various performance optimisations, checkerboard drawing
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fixes, and support for VUYA format
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- encodebin: Fix and refactor smart encoding; ensure that a single
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segment is pushed into encoders; improve force-key-unit event
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handling.
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- opusenc: Add low delay option (audio-type=restricted-lowdelay) to
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disable the SILK layer and achieve only 5ms delay.
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- opusdec: add stats property to retrieve various decoder statistics.
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- uridecodebin3: Let decodebin3 do its stream selection if no one
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answers
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- decodebin3: Avoid overriding explicit user selection of streams
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- playbin: add flag to force use of software decoders over any
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hardware decoders that might also be available
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- playbin3, playbin: propagate sink context
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- rawvideoparse: Fix tiling support, allow setting colorimetry
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- subparse: output plain utf8 text instead of pango-markup formatted
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text if downstream requires it, useful for interop with elements
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that only accept utf8-formatted subtitles such as muxers or closed
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caption converters.
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- tcpserversrc, tcpclientsrc: add stats property with TCP connection
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stats (some are only available on Linux though)
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- timeoverlay: add show-times-as-dates, datetime-format and
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datetime-epoch properties to display times with dates
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- videorate: Fix changing rate property during playback; reverse
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playback fixes; update QoS events taking into account our rate
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- videoscale: pass through and transform size sensitive metas instead
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of just dropping them
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Plugins Good
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- avidemux can handle H.265 video now. Our advice remains to
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immediately cease all contact and communication with anyone who
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hands you H.265 video in an AVI container, however.
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- avimux: Add support for S24LE and S32LE raw audio and v210 raw video
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formats; support more than 2 channels of raw audio.
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- souphttpsrc: disable session sharing and cookie jar when the cookies
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property is set; correctly handle seeks past the end of the content
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- deinterlace: new YADIF deinterlace method which should provide
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better quality than the existing methods and is LGPL licensed;
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alternate fields are supported as input to the deinterlacer as well
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now, and there were also fixes for switching the deinterlace mode on
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the fly.
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- flvmux: in streamable mode allow adding new pads even if the initial
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header has already been written. Old clients will only process the
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initial stream, new clients will get a header with the new streams.
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The skip-backwards-streams property can be used to force flvmux to
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skip and drop a few buffers rather than produce timestamps that go
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backward and confuse librtmp-based clients. There’s also better
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handling for timestamp rollover when streaming for a long time.
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- imagefreeze: Add live mode, which can be enabled via the new is-live
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property. In this mode frames will only be output in PLAYING state
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according to the negotiated framerate, skipping frames if the output
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can’t keep up (e.g. because it’s blocked downstream). This makes it
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possible to actually use imagefreeze in live pipelines without
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having to manually ensure somehow that it starts outputting at the
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current running time and without still risking to fall behind
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without recovery.
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- matroskademux, qtdemux: Provide audio lead-in for some lossy formats
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when doing accurate seeks, to make sure we can actually decode
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samples at the desired position. This is especially important for
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non-linear audio/video editing use-cases.
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- matroskademux, matroskamux: Handle interlaced field order (tff, bff)
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- matroskamux:
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- new offset-to-zero property to offset all streams to start at
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zero. This takes the timestamp of the earliest stream and
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offsets it so that it starts at 0. Some software (VLC,
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ffmpeg-based) does not properly handle Matroska files that start
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at timestamps much bigger than zero, which could happen with
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live streams.
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- added a creation-time property to explicitly set the creation
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time to write into the file headers. Useful when remuxing, for
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example, but also for live feeds where the DateUTC header can be
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set a UTC timestamp corresponding to the beginning of the file.
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- the muxer now also always waits for caps on sparse streams, and
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warns if caps arrive after the header has already been sent,
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otherwise the subtitle track might be silently absent in the
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final file. This might affect applications that send sparse data
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into matroskamux via an appsrc element, which will usually not
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send out the initial caps before it sends out the first buffer.
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- pulseaudio: device provider improvements: fix discovery of
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newly-added devices and hide the alsa device provider if we provide
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alsa devices
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- qtdemux: raw audio handling improvements, support for AC4 audio, and
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key-units trickmode interval support
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- qtmux:
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|
||
- was ported to the GstAggregator base class which allows for
|
||
better handling of live inputs, but might entail minor
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behavioural changes for sparse inputs if inputs are not live.
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- has also gained a force-create-timecode-trak property to create
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a timecode trak in non-mov flavors, which may not be supported
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by Apple but is supported by other software such as Final Cut
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Pro X
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- also a force-chunks property to force the creation of chunks
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even in single-stream files, which is required for Apple ProRes
|
||
certification.
|
||
- also supports 8k resolutions in prefill mode with ProRes.
|
||
|
||
- rtpbin gained a request-jitterbuffer signal which allows
|
||
applications to plug in their own jitterbuffer implementation such
|
||
as the threadsharing jitterbuffer from the Rust plugins, for
|
||
example.
|
||
|
||
- rtprtxsend: add clock-rate-map property to allow generic RTP input
|
||
caps without a clock-rate whilst still supporting the max-size-time
|
||
property for bundled streams.
|
||
|
||
- rtpssrcdemux: introduce max-streams property to guard against
|
||
attacks where the sender changes SSRC for every RTP packet.
|
||
|
||
- rtph264pay, rtph264pay: implement STAP-A and various aggregation
|
||
modes controled by the new aggegrate-mode property: none to not
|
||
aggregate NAL units (as before), zero-latency to aggregate NAL units
|
||
until a VCL or suffix unit is included, or max to aggregate all NAL
|
||
units with the same timestamp (which adds one frame of latency). The
|
||
default has been kept at none for backwards compatibility reasons
|
||
and because various RTP/RTSP implementions don’t handle aggregation
|
||
well. For WebRTC use cases this should be set to zero-latency,
|
||
however.
|
||
|
||
- rtpmp4vpay: add support for config-interval=-1 to resend headers
|
||
with each IDR keyframe, like other video payloaders.
|
||
|
||
- rtpvp8depay: Add wait-for-keyframe property for waiting until the
|
||
next keyframe after packet loss. Useful if the video stream was not
|
||
encoded with error resilience enabled, in which case packet loss
|
||
tends to cause very bad artefacts when decoding, and waiting for the
|
||
next keyframe instead improves user experience considerably.
|
||
|
||
- splitmuxsink and splitmuxsrc can now handle auxiliary video streams
|
||
in addition to the primary video stream. The primary video stream is
|
||
still used to select fragment cut points at keyframe boundaries.
|
||
Auxilliary video streams may be broken up at any packet - so
|
||
fragments may not start with a keyframe for those streams.
|
||
|
||
- splitmuxsink:
|
||
|
||
- new muxer-preset and sink-preset properties for setting
|
||
muxer/sink presets
|
||
- a new start-index property to set the initial fragment id
|
||
- and a new muxer-pad-map property which explicitly maps
|
||
splitmuxsink pads to the muxer pads they should connect to,
|
||
overriding the implicit logic that tries to match pads but
|
||
yields arbitrary names.
|
||
- Also includes the actual sink element in the fragment-opened and
|
||
fragment-closed element messages now, which is especially useful
|
||
for sinks without a location property or when finalisation of
|
||
the fragments is done asynchronously.
|
||
|
||
- videocrop: add support for Y444, Y41B and Y42B pixel formats
|
||
|
||
- vp8enc, vp9enc: change default value of VP8E_SET_STATIC_THRESHOLD
|
||
from 0 to 1 which matches what Google WebRTC does and results in
|
||
lower CPU usage; also added a new bit-per-pixel property to select a
|
||
better default bitrate
|
||
|
||
- v4l2: add support for ABGR, xBGR, RGBA, and RGBx formats and for
|
||
handling interlaced video in alternate fields interlace mode (one
|
||
field per buffer instead of one frame per picture with both fields
|
||
interleaved)
|
||
|
||
- v4l2: Profile and level probing support for H264, H265, MPEG-4,
|
||
MPEG-2, VP8, and VP9 video encoders and decoders
|
||
|
||
Plugins Ugly
|
||
|
||
- asfdemux: extract more metadata: disc number and disc count
|
||
|
||
- x264enc:
|
||
|
||
- respect YouTube bitrate recommendation when user sets the
|
||
YouTube profile preset
|
||
- separate high-10 video formats from 8-bit formats to improve
|
||
depth negotiation and only advertise suitable input raw formats
|
||
for the desired output depth
|
||
- forward downstream colorimetry and chroma-site restrictions to
|
||
upstream elements
|
||
- support more color primaries/mappings
|
||
|
||
Plugins Bad
|
||
|
||
- av1enc: add threads, row-mt and tile-{columns,rows} properties for
|
||
this AOMedia AV1 encoder
|
||
|
||
- ccconverter: implement support for CDP framerate conversions
|
||
|
||
- ccextractor: Add remove-caption-meta property to remove caption
|
||
metas from the outgoing video buffers
|
||
|
||
- decklink: add support for 2K DCI video modes, widescreen NTSC/PAL,
|
||
and for parsing/outputting AFD/Bar data. Also implement a simple
|
||
device provider for Decklink devices.
|
||
|
||
- dtlsrtpenc: add rtp-sync property which synchronises RTP streams to
|
||
the pipeline clock before passing them to funnel for merging with
|
||
RTCP.
|
||
|
||
- fdkaac: also decode MPEG-2 AAC; encoder now supports more
|
||
multichannel/surround sound layouts
|
||
|
||
- hlssink2: add action signals for custom playlist/fragment handling:
|
||
Instead of always going through the file system API we allow the
|
||
application to modify the behaviour. For the playlist itself and
|
||
fragments, the application can provide a GOutputStream. In addition
|
||
the sink notifies the application whenever a fragment can be
|
||
deleted.
|
||
|
||
- interlace: can now output data in alternate fields mode; added field
|
||
switching mode for 2:2 field pattern
|
||
|
||
- iqa: Add a mode property to enable strict mode that checks that all
|
||
the input streams have the exact same number of frames; also
|
||
implement the child proxy interface
|
||
|
||
- mpeg2enc: add disable-encode-retries property for lower CPU usage
|
||
|
||
- mpeg4videoparse: allow re-sending codec config at IDR via
|
||
config-interval=-1
|
||
|
||
- mpegtsparse: new alignment property to determine number of TS
|
||
packets per output buffer, useful for feeding an MPEG-TS stream for
|
||
sending via udpsink. This can be used in combination with the
|
||
split-on-rai property that makes sure to start a new output buffer
|
||
for any TS packet with the Random Access Indicator set. Also set
|
||
delta unit buffer flag on non-random-access buffers.
|
||
|
||
- mpegdemux: add an ignore-scr property to ignore the SCR in
|
||
non-compliant MPEG-PS streams with a broken SCR, which will work as
|
||
long as PTS/DTS in the PES header is consistently increasing.
|
||
|
||
- tsdemux:
|
||
|
||
- add an ignore-pcr property to ignore MPEG-TS streams with broken
|
||
PCR streams on which we can’t reliably recover correct
|
||
timestamps.
|
||
- new latency property to allow applications to lower the
|
||
advertised worst-case latency of 700ms if they know their
|
||
streams support this (must have timestamps in higher frequency
|
||
than required by the spec)
|
||
- support for AC4 audio
|
||
|
||
- msdk - Intel Media SDK plugin for hardware-accelerated video
|
||
decoding and encoding on Windows and Linux:
|
||
|
||
- mappings for more video formats: Y210, Y410, P012_LE, Y212_LE
|
||
- encoders now support bitrate changes and input format changes in
|
||
playing state
|
||
- msdkh264enc, msdkh265enc: add support for CEA708 closed caption
|
||
insertion
|
||
- msdkh264enc, msdkh265enc: set Region of Interest (ROI) region
|
||
from ROI metas
|
||
- msdkh264enc, msdkh265enc: new tune property to enable low-power
|
||
mode
|
||
- msdkh265enc: add support 12-bit 4:2:0 encoding and 8-bit 4:2:2
|
||
encoding and VUYA, Y210, and Y410 as input formats
|
||
- msdkh265enc: add support for screen content coding extension
|
||
- msdkh265dec: add support for main-12/main-12-intra,
|
||
main-422-10/main-422-10-intra 10bit,
|
||
main-422-10/main-422-10-intra 8bit,
|
||
main-422-12/main-422-12-intra, main-444-10/main-444-10-intra,
|
||
main-444-12/main-444-12-intra, and main-444 profiles
|
||
- msdkvp9dec: add support for 12-bit 4:4:4
|
||
- msdkvpp: add support for Y410 and Y210 formats, cropping via
|
||
properties, and a new video-direction property.
|
||
|
||
- mxf: Add support for CEA-708 CDP from S436 essence tracks. mxfdemux
|
||
can now handle Apple ProRes
|
||
|
||
- nvdec: add H264 + H265 stateless codec implementation nvh264sldec
|
||
and nvh265sldec with fewer features but improved latency. You can
|
||
set the environment variable GST_USE_NV_STATELESS_CODEC=h264 to use
|
||
the stateless decoder variant as nvh264dec instead of the “normal”
|
||
NVDEC decoder implementation.
|
||
|
||
- nvdec: add support for 12-bit 4:4:4/4:2:0 and 10-bit 4:2:0 decoding
|
||
|
||
- nvenc:
|
||
|
||
- add more rate-control options, support for B-frame encoding (if
|
||
device supports it), an aud property to toggle Access Unit
|
||
Delimiter insertion, and qp-{min,max,const}-{i,p,b} properties.
|
||
- the weighted-pred property enables weighted prediction.
|
||
- support for more input formats, namely 8-bit and 10-bit RGB
|
||
formats (BGRA, RGBA, RGB10A2, BGR10A2) and YV12 and VUYA.
|
||
- on-the-fly resolution changes are now supported as well.
|
||
- in case there are multiple GPUs on the system, there are also
|
||
per-GPU elements registered now, since different devices will
|
||
have different capabilities.
|
||
- nvh265enc can now support 10-bit YUV 4:4:4 encoding and 8-bit
|
||
4:4:4 / 10-bit 4:2:0 formats up to 8K resolution (with some
|
||
devices). In case of HDR content HDR related SEI nals will be
|
||
inserted automatically.
|
||
|
||
- openjpeg: enable multi-threaded decoding and add support for
|
||
sub-frame encoding (for lower latency)
|
||
|
||
- rtponviftimestamp: add opt-out “drop-out-of-segment” property
|
||
|
||
- spanplc: new stats property
|
||
|
||
- srt: add support for IPv6 and for using hostnames instead of IP
|
||
addresses; add streamid property, but also allow passing the id via
|
||
the stream URI; add wait-for-connection property to srtsink
|
||
|
||
- timecodestamper: this element was rewritten with an updated API
|
||
(properties); it has gained many new properties, seeking support and
|
||
support for linear timecode (LTC) from an audio stream.
|
||
|
||
- uvch264src now comes with a device provider to advertise available
|
||
camera sources that support this interface (mostly Logitech C920s)
|
||
|
||
- wpe: Add software rendering support and support for mouse scroll
|
||
events
|
||
|
||
- x265enc: support more 8/10/12 bits 4:2:0, 4:2:2 and 4:4:4 profiles;
|
||
add support for mastering display info and content light level
|
||
encoding SEIs
|
||
|
||
gst-libav
|
||
|
||
- Add mapping for SpeedHQ video codec used by NDI
|
||
|
||
- Add mapping for aptX and aptX-HD
|
||
|
||
- avivf_mux: support VP9 and AV1
|
||
|
||
- avvidenc: shift output buffer timestamps and output segment by 1h
|
||
just like x264enc does, to allow for negative DTS.
|
||
|
||
- avviddec: Limit default number of decoder threads on systems with
|
||
more than 16 cores, as the number of threads used in avdec has a
|
||
direct impact on the latency of the decoder, which is of as many
|
||
frames as threads, so a large numbers of threads can make for
|
||
latency levels that can be problematic in some applications.
|
||
|
||
- avviddec: Add thread-type property that allows applications to
|
||
specify the preferred multithreading method (auto, frame, slice).
|
||
Note that thread-type=frame may introduce additional latency
|
||
especially in live pipelines, since it introduces a decoding delay
|
||
of number of thread frames.
|
||
|
||
Plugin and library moves
|
||
|
||
- There were no plugin moves or library moves in this cycle.
|
||
|
||
- The rpicamsrc element was moved into -good from an external
|
||
repository on github.
|
||
|
||
Plugin removals
|
||
|
||
The following elements or plugins have been removed:
|
||
|
||
- The yadif video deinterlacing plugin from gst-plugins-bad, which was
|
||
one of the few GPL licensed plugins, has been removed in favour of
|
||
deinterlace method=yadif.
|
||
|
||
- The avdec_cdgraphics CD Graphics video decoder element from
|
||
gst-libav was never usable in GStreamer and we now have a cdgdec
|
||
element written in Rust in gst-plugins-rs to replace it.
|
||
|
||
- The VDPAU plugin has been unmaintained and unsupported for a very
|
||
long time and does not have the feature set we expect from
|
||
hardware-accelerated video decoders. It’s been superseded by the
|
||
nvcodec plugin leveraging NVIDIA’s NVDEC API.
|
||
|
||
Miscellaneous API additions
|
||
|
||
GStreamer core
|
||
|
||
- gst_task_resume(): This new API allows resuming a task if it was
|
||
paused, while leaving it in stopped state if it was stopped or not
|
||
started yet. This can be useful for callback-based driver workflows,
|
||
where you basically want to pause and resume the task when buffers
|
||
are notified while avoiding the race with a gst_task_stop() coming
|
||
from another thread.
|
||
|
||
- info: add printf extensions GST_TIMEP_FORMAT and GST_STIMEP_FORMAT
|
||
for printing GstClockTime/GstClockTimeDiff pointers, which is much
|
||
more convenient to use in debug log statements than the usual
|
||
GST_TIME_FORMAT-followed-by-GST_TIME_ARGS dance. Also add an
|
||
explicit GST_STACK_TRACE_SHOW_NONE enum value.
|
||
|
||
- gst_element_get_current_clock_time() and
|
||
gst_element_get_current_running_time(): new helper functions for
|
||
getting an element clock’s time, and the clock time minus base time,
|
||
respectively. Useful when adding additional input branches to
|
||
elements such as compositor, audiomixer, flvmux, interleave or
|
||
input-selector to determine initial pad offsets and such.
|
||
|
||
- seeking: Add GST_SEEK_FLAG_TRICKMODE_FORWARD_PREDICTED to just skip
|
||
B-frames during trick mode, showing both keyframes + P-frame, and
|
||
add support for it in h264parse and h265parse.
|
||
|
||
- elementfactory: add GST_ELEMENT_FACTORY_TYPE_HARDWARE to allow
|
||
elements to advertise that they are hardware-based or interact with
|
||
hardware. This has multiple applications:
|
||
|
||
- it makes it possible to easily differentiate hardware and
|
||
software based element implementations such as audio or video
|
||
encoders and decoders. This is useful in order to force the use
|
||
of software decoders for specific use cases, or to check if a
|
||
selected decoder is actually hardware-accelerated or not.
|
||
- elements interacting with hardware and their respective drivers
|
||
typically don’t know the actually supported capabilities until
|
||
the element is set into at least READY state and can open a
|
||
device handle and probe the hardware.
|
||
|
||
- gst_uri_from_string_escaped(): identical to gst_uri_from_string()
|
||
except that the userinfo and fragment components of the URI will not
|
||
be unescaped while parsing. This is needed for correctly parsing
|
||
usernames or passwords with : in them .
|
||
|
||
- paramspecs: new GstParamSpec flag GST_PARAM_CONDITIONALLY_AVAILABLE
|
||
to indicate that a property might not always exist.
|
||
|
||
- gst_bin_iterate_all_by_element_factory_name() finds elements in a
|
||
bin by factory name
|
||
|
||
- pad: gst_pad_get_single_internal_link() is a new convenience
|
||
function to return the single internal link of a pad, which is
|
||
useful e.g. to retrieve the output pad of a new multiqueue request
|
||
pad.
|
||
|
||
- datetime: Add constructors to create datetimes with timestamps in
|
||
microseconds, gst_date_time_new_from_unix_epoch_local_time_usecs()
|
||
and gst_date_time_new_from_unix_epoch_utc_usecs().
|
||
|
||
- gst_debug_log_get_lines() gets debug log lines formatted in the same
|
||
way the default log handler would print them
|
||
|
||
- GstSystemClock: Add GST_CLOCK_TYPE_TAI as GStreamer abstraction for
|
||
CLOCK_TAI, to support transmission offloading features where network
|
||
packets are timestamped with the time they are deemed to be actually
|
||
transmitted. Useful in combination with the new AVTP plugin.
|
||
|
||
- miscellaneous utility functions: gst_clear_uri(),
|
||
gst_structure_take().
|
||
|
||
- harness: Added gst_harness_pull_until_eos()
|
||
|
||
- GstBaseSrc:
|
||
|
||
- gst_base_src_new_segment() allows subclasses to update the
|
||
segment to be used at runtime from the ::create() function. This
|
||
deprecates gst_base_src_new_seamless_segment()
|
||
- gst_base_src_negotiate() allows subclasses to trigger format
|
||
renegotiation at runtime from inside the ::create() or ::alloc()
|
||
function
|
||
|
||
- GstBaseSink: new stats property and gst_base_sink_get_stats() method
|
||
to retrieve various statistics such as average frame rate and
|
||
dropped/rendered buffers.
|
||
|
||
- GstBaseTransform: gst_base_transform_reconfigure() is now public
|
||
API, useful for subclasses that need to completely re-implement the
|
||
::submit_input_buffer() virtual method
|
||
|
||
- GstAggregator:
|
||
|
||
- gst_aggregator_update_segment() allows subclasses to update the
|
||
output segment at runtime. Subclasses should use this function
|
||
rather than push a segment event onto the source pad directly.
|
||
- new sample selection API:
|
||
- subclasses should now call gst_aggregator_selected_samples()
|
||
from their ::aggregate() implementation to signal that they
|
||
have selected the next samples they will aggregate
|
||
- GstAggregator will then emit the samples-selected signal
|
||
where handlers can then look up samples per pad via
|
||
gst_aggregator_peek_next_sample().
|
||
- This is useful for example to atomically update input pad
|
||
properties in mixer subclasses such as compositor.
|
||
Applications can now update properties with precise control
|
||
of when these changes will take effect, and for which input
|
||
buffer(s).
|
||
- gst_aggregator_finish_buffer_list() allows subclasses to push
|
||
out a buffer list, improving efficiency in some cases.
|
||
- a ::negotiate() virtual method was added, for consistency with
|
||
other base classes and to allow subclasses to completely
|
||
override the negotiation behaviour.
|
||
- the new ::sink_event_pre_queue() and ::sink_query_pre_queue()
|
||
virtual methods allow subclasses to intercept or handle
|
||
serialized events and queries before they’re queued up
|
||
internally.
|
||
|
||
GStreamer Plugins Base Libraries
|
||
|
||
Audio library
|
||
|
||
- audioaggregator, audiomixer: new output-buffer-duration-fraction
|
||
property which allows use cases such as keeping the buffers output
|
||
by compositor on one branch and audiomixer on another perfectly
|
||
aligned, by requiring the compositor to output a n/d frame rate, and
|
||
setting output-buffer-duration-fraction to d/n on the audiomixer.
|
||
|
||
- GstAudioDecoder: new max-errors property so applications can
|
||
configure at what point the decoder should error out, or tell it to
|
||
just keep going
|
||
|
||
- gst_audio_make_raw_caps() and gst_audio_formats_raw() are
|
||
bindings-friendly versions of the GST_AUDIO_CAPS_MAKE() C macro.
|
||
|
||
- gst_audio_info_from_caps() now handles encoded audio formats as well
|
||
|
||
PbUtils library
|
||
|
||
- GstEncodingProfile:
|
||
- Do not restrict number of similar profiles in a container
|
||
- add GstValue serialization function
|
||
- codec utils now support more H.264/H.265 profiles/levels and have
|
||
improved extension handling
|
||
|
||
RTP library
|
||
|
||
- rtpbasepayloader: Add scale-rtptime property for scaling RTP
|
||
timestamp according to the segment rate (equivalent to RTSP speed
|
||
parameter). This is useful for ONVIF trickmodes via RTSP.
|
||
|
||
- rtpbasepayload: add experimental property for embedding twcc
|
||
sequencenumbers for Transport-Wide Congestion Control (gated behind
|
||
the GST_RTP_ENABLE_EXPERIMENTAL_TWCC_PROPERTY environment
|
||
variable) - more generic API for enabling this is expected to land
|
||
in the next development cycle.
|
||
|
||
- rtcpbuffer: add RTPFB_TYPE_TWCC for Transport-Wide Congestion
|
||
Control
|
||
|
||
- rtpbuffer: add
|
||
gst_rtp_buffer_get_extension_onebyte_header_from_bytes()``, so that one can parse theGBytes`
|
||
returned by gst_rtp_buffer_get_extension_bytes()
|
||
|
||
- rtpbasedepayload: Add max-reorder property to make the
|
||
previously-hardcoded value when to consider a sender to have
|
||
restarted configurable. In some scenarios it’s particularly useful
|
||
to set max-reorder=0 to disable the behaviour that the depayloader
|
||
will drop packets: when max-reorder is set to 0 all
|
||
reordered/duplicate packets are considered coming from a restarted
|
||
sender.
|
||
|
||
RTSP library
|
||
|
||
- add gst_rtsp_url_get_request_uri_with_control() to create request
|
||
uri combined with control url
|
||
|
||
- GstRTSPConnection: add the possibility to limit the Content-Length
|
||
for RTSP messages via
|
||
gst_rtsp_connection_set_content_length_limit(). The same
|
||
functionality is also exposed in gst-rtsp-server.
|
||
|
||
SDP library
|
||
|
||
- add support for parsing the extmap attribute from caps and storing
|
||
inside caps The extmap attribute allows mapping RTP extension header
|
||
IDs to well-known RTP extension header specifications. See RFC8285
|
||
for details.
|
||
|
||
Tags library
|
||
|
||
- update to latest iso-code and support more languages
|
||
|
||
- add tags for acoustid id & acoustid fingerprint, plus MusicBrainz ID
|
||
handling fixes
|
||
|
||
Video library
|
||
|
||
- High Dynamic Range (HDR) video information representation and
|
||
signalling enhancements:
|
||
|
||
- New APIs for HDR video information representation and
|
||
signalling:
|
||
- GstVideoMasteringDisplayInfo: display color volume info as
|
||
per SMPTE ST 2086
|
||
- GstVideoContentLightLevel: content light level specified in
|
||
CEA-861.3, Appendix A.
|
||
- plus functions to serialise/deserialise and add them to or
|
||
parse them from caps
|
||
- gst_video_color_{matrix,primaries,transfer}_{to,from}_iso():
|
||
new utilility functions for conversion from/to ISO/IEC
|
||
23001-8
|
||
- add ARIB STD-B67 transfer chracteristic function
|
||
- add SMPTE ST 2084 support and BT 2100 colorimetry
|
||
- define bt2020-10 transfer characteristics for clarity:
|
||
bt707, bt2020-10, and bt2020-12 transfer characteristics are
|
||
functionally identical but have their own unique values in
|
||
the specification.
|
||
- h264parse, h265parse: Parse mastering display info and content
|
||
light level from SEIs.
|
||
- matroskademux: parse HDR metadata
|
||
- matroskamux: Write MasteringMetadata and Max{CLL,FALL}. Enable
|
||
muxing with HDR meta data if upstream provided it
|
||
- avviddec: Extract HDR information if any and map bt2020-10, PQ
|
||
and HLG transfer functions
|
||
|
||
- added bt601 transfer function (for completeness)
|
||
|
||
- support for more pixel formats:
|
||
|
||
- Y412 (packed 12 bits 4:4:4:4)
|
||
- Y212 (packed 12 bits 4:2:2)
|
||
- P012 (semi-planar 4:2:0)
|
||
- P016_{LE,BE} (semi-planar 16 bits 4:2:0)
|
||
- Y444_16{LE,BE} (planar 16 bits 4:4:4)
|
||
- RGB10A2_LE (packed 10-bit RGB with 2-bit alpha channel)
|
||
- NV12_32L32 (NV12 with 32x32 tiles in linear order)
|
||
- NV12_4L4 (NV12 with 4x4 tiles in linear order)
|
||
|
||
- GstVideoDecoder:
|
||
|
||
- new max-errors property so applications can configure at what
|
||
point the decoder should error out, or tell it to just keep
|
||
going
|
||
|
||
- new qos property to disable dropping frames because of QoS, and
|
||
post QoS messages on the bus when dropping frames. This is
|
||
useful for example in a scenario where the decoded video is
|
||
tee-ed off to go into a live sink that syncs to the clock in one
|
||
branch, and an encoding and save to file pipeline in the other
|
||
branch. In that case one wouldn’t want QoS events from the video
|
||
sink make the decoder drop frames because that would also leave
|
||
gaps in the encoding branch then.
|
||
|
||
- GstVideoEncoder:
|
||
|
||
- gst_video_encoder_finish_subframe() is new API to push out
|
||
subframes (e.g. slices), so encoders can split the encoding into
|
||
subframes, which can be useful to reduce the overall end-to-end
|
||
latency as we no longer need to wait for the full frame to be
|
||
encoded to start decoding or sending out the data.
|
||
- new min-force-key-unit-interval property allows configuring the
|
||
minimum interval between force-key-unit requests and prevents a
|
||
big bitrate increase if a lot of key-units are requested in a
|
||
short period of time (as might happen in live streaming RTP
|
||
pipelines when packet loss is detected).
|
||
- various force-key-unit event handling fixes
|
||
|
||
- GstVideoAggregator, compositor, glvideomixer: expose
|
||
max-last-buffer-repeat property on pads. This can be used to have a
|
||
compositor display either the background or a stream on a lower
|
||
zorder after a live input stream freezes for a certain amount of
|
||
time, for example because of network issues.
|
||
|
||
- gst_video_format_info_component() is new API to find out which
|
||
components are packed into a given plane, which is useful to prevent
|
||
us from assuming a 1-1 mapping between planes and components.
|
||
|
||
- gst_video_make_raw_caps() and gst_video_formats_raw() are
|
||
bindings-friendly versions of the GST_VIDEO_CAPS_MAKE() C macro.
|
||
|
||
- video-blend: Add support for blending on top of 16 bit per component
|
||
formats, which makes sure we can support every currently supported
|
||
raw video format for blending subtitles or logos on top of video.
|
||
|
||
- GST_VIDEO_BUFFER_IS_TOP_FIELD() and
|
||
GST_VIDEO_BUFFER_IS_BOTTOM_FIELD() convenience macros to check
|
||
whether the video buffer contains only the top field or bottom field
|
||
of an interlaced picture.
|
||
|
||
- GstVideoMeta now includes an alignment field with the
|
||
GstVideoAlignment so buffer producers can explicitly specify the
|
||
exact geometry of the planes, allowing users to easily know the
|
||
padded size and height of each plane. Default values will be used if
|
||
this is not set.
|
||
|
||
Use gst_video_meta_set_alignment() to set the alignment and
|
||
gst_video_meta_get_plane_size() or gst_video_meta_get_plane_height()
|
||
to compute the plane sizes or plane heights based on the information
|
||
in the video meta.
|
||
|
||
- gst_video_info_align_full() works like gst_video_info_align() but
|
||
also retrieves the plane sizes.
|
||
|
||
MPEG-TS library
|
||
|
||
- support for SCTE-35 sections
|
||
|
||
- extend support for ATSC tables:
|
||
|
||
- System Time Table (STT)
|
||
- Master Guide Table (MGT)
|
||
- Rating Region Table (RRT)
|
||
|
||
Miscellaneous performance, latency and memory optimisations
|
||
|
||
As always there have been many performance and memory usage improvements
|
||
across all components and modules. Some of them have already been
|
||
mentioned elsewhere so won’t be repeated here.
|
||
|
||
The following list is only a small snapshot of some of the more
|
||
interesting optimisations that haven’t been mentioned in other contexts
|
||
yet:
|
||
|
||
- caps negotiation, structure and GValue performance optimizations
|
||
|
||
- systemclock: clock waiting performance improvements (moved from
|
||
GstPoll to GCond for waiting), especially on Windows.
|
||
|
||
- rtpsession: add support for buffer lists on the recv path for better
|
||
performance with higher packet rate streams.
|
||
|
||
- rtpjitterbuffer: internal timer handling has been rewritten for
|
||
better performance, see Nicolas’ talk “Revisiting RTP Jitter Buffer
|
||
Timers” for more details.
|
||
|
||
- H.264/H.265 parsers and RTP payloaders/depayloaders have been
|
||
optimised for latency to make sure data is processed and pushed out
|
||
as quickly as possible
|
||
|
||
- video-scaler: correctness and performance improvements, esp. for
|
||
interlaced formats and GBRA
|
||
|
||
- GstVideoEncoder has gained new API to push out subframes
|
||
(e.g. slices), so encoders can split the encoding into subframes,
|
||
which can be useful to reduce the overall end-to-end latency as we
|
||
no longer need to wait for the full frame to be encoded to start
|
||
decoding or sending out the data.
|
||
|
||
This is complemented by the new GST_VIDEO_BUFFER_FLAG_MARKER which
|
||
is a video-specific buffer flag to mark the end of a video frame, so
|
||
elements can know that they have received all data for a frame
|
||
without waiting for the beginning of the next frame. This is similar
|
||
to how the RTP marker flag is used in many RTP video mappings.
|
||
|
||
The video encoder base class now also releases the internal stream
|
||
lock before pushing out data, so as to not block the input side of
|
||
things from processing more data in the meantime.
|
||
|
||
Miscellaneous other changes and enhancements
|
||
|
||
- it is now possible to modify the initial rank of plugin features
|
||
without modifying the source code or writing code to do so
|
||
programmatically via the GST_PLUGIN_FEATURE_RANK environment
|
||
variable. Users can adjust the rank of plugin(s) by passing a
|
||
comma-separated list of feature:rank pairs where rank can be a
|
||
numerical value or one of NONE, MARGINAL, SECONDARY, PRIMARY, and
|
||
MAX. Example: GST_PLUGIN_FEATURE_RANK=myh264dec:MAX,avdec_h264:NONE
|
||
sets the rank of the myh264dec element feature to the maximum and
|
||
that of avdec_h264 to 0 (none), thus ensuring that myh264dec is
|
||
prefered as H264 decoder in an autoplugging context.
|
||
|
||
- GstDeviceProvider now does a static probe on start as fallback for
|
||
providers that don’t support dynamic probing to make things easier
|
||
for users
|
||
|
||
WebRTC
|
||
|
||
- webrtcbin now contains initial support for renegotiation involving
|
||
stream addition and removal. There are a number of caveats to this
|
||
initial renegotiation support and many complex scenarios are known
|
||
to require some work.
|
||
|
||
- webrtcbin now exposes the internal ICE object for advanced
|
||
configuration options. Using the internal ICE object, it is possible
|
||
to toggle UDP or TCP connection usage as well as provide local
|
||
network addresses.
|
||
|
||
- Fix a number of call flows within webrtcbin’s GstPromise handling
|
||
where a promise was never replied to. This has been fixed and now a
|
||
promise will always receive a reply.
|
||
|
||
- webrtcbin now exposes a latency property for configuring the
|
||
internal rtpjitterbuffer latency and buffering when receiving
|
||
streams.
|
||
|
||
- webrtcbin now only synchronises the RTP part of a stream, allowing
|
||
RTCP messages to skip synchronisation entirely.
|
||
|
||
- Fixed most of the webrtcbin state properties (connection-state,
|
||
ice-connection-state, signaling-state, but not ice-gathering-state
|
||
as that requires newer API in libnice and will be fixed in the next
|
||
release series) to advance through the state values correctly. Also
|
||
implemented DTLS connection states in the DTLS elements so that
|
||
peer-connection-state is not always new.
|
||
|
||
- webrtcbin now accounts for the a=ice-lite attribute in a remote SDP
|
||
offer and will configure the internal ICE implementation
|
||
accordingly.
|
||
|
||
- webrtcbin will now resolve .local candidate addresses using the
|
||
system DNS resolver. .local candidate addresses are now produced by
|
||
web browsers to help protect the privacy of users.
|
||
|
||
- webrtcbin will now add candidates found in the SDP to the internal
|
||
ICE agent. This was previously unsupported and required using the
|
||
add-ice-candidate signal manually from the application.
|
||
|
||
- webrtcbin will now correctly parse a TURN URI that contains a
|
||
username or password with a : in it.
|
||
|
||
- The GStreamer WebRTC library gained a GstWebRTCDataChannel object
|
||
roughly matching the interface exposed by the WebRTC specification
|
||
to allow for easier binding generation and use of data channels.
|
||
|
||
OpenGL integration
|
||
|
||
GStreamer OpenGL bindings/build related changes
|
||
|
||
- The GStreamer OpenGL library (libgstgl) now ships pkg-config files
|
||
for platform-specific API where libgstgl provides a public
|
||
integration interface and a pkg-config file for a dependency on the
|
||
detected OpenGL headers. The new list of pkg-config files in
|
||
addition to the original gstreamer-gl-1.0 are gstreamer-gl-x11-1.0,
|
||
gstreamer-gl-wayland-1.0, gstreamer-gl-egl-1.0, and
|
||
gstreamer-gl-prototypes-1.0 (for OpenGL headers when including
|
||
gst/gl/gstglfuncs.h).
|
||
|
||
- GStreamer OpenGL now ships some platform-specific introspection data
|
||
for platforms that have a public interface. This should allow for
|
||
easier integration with bindings involving platform specific
|
||
functionality. The new introspection data files are named
|
||
GstGLX11-1.0, GstGLWayland-1.0, and GstGLEGL-1.0.
|
||
|
||
GStreamer OpenGL Features
|
||
|
||
- The iOS implementation no longer accesses UIKit objects off the main
|
||
thread fixing a loud warning message when used in iOS applications.
|
||
|
||
- Support for mouse and keyboard handling using the GstNavigation
|
||
interface was added for the wayland implementation complementing the
|
||
already existing support for the X11 and Windows implementations.
|
||
|
||
- A new helper base class for source elements, GstGLBaseSrc is
|
||
provided to ease writing source elements producing OpenGL video
|
||
frames.
|
||
|
||
- Support for some more 12-bit and 16-bit video formats (Y412_LE,
|
||
Y412_BE, Y212_LE, Y212_BE, P012_LE, P012_BE, P016, NV16, NV61) was
|
||
added to glcolorconvert.
|
||
|
||
- glupload can now import dma-buf’s into external-oes textures.
|
||
|
||
- A new display type for EGLDevice-based systems was added. It is
|
||
currently opt-in by using either the GST_GL_PLATFORM=egl-device
|
||
environment variable or manual construction
|
||
(gst_gl_display_egl_device_new*()) due to compatibility issues with
|
||
some platforms.
|
||
|
||
- Support was added for WinRT/UWP using the ANGLE project for running
|
||
OpenGL-based pipelines within a UWP application.
|
||
|
||
- Various elements now support changing the GstGLDisplay to be used at
|
||
runtime in simple cases. This is primarily helpful for changing or
|
||
adding an OpenGL-based video sink that must share an OpenGL context
|
||
with an external source to an already running pipeline.
|
||
|
||
GStreamer Vulkan integration
|
||
|
||
- There is now a GStreamer Vulkan library to provide integration
|
||
points and helpers with applications and external GStreamer Vulkan
|
||
based elements. The structure of the library is modelled similarly
|
||
to the already existing GStreamer OpenGL library. Please note that
|
||
the API is still unstable and may change in future releases,
|
||
particularly around memory handling. The GStreamer Vulkan library
|
||
contains objects for sharing the vkInstance, vkDevice, vkQueue,
|
||
vkImage, VkMemory, etc with other elements and/or the application as
|
||
well as some helper objects for using Vulkan in an application or
|
||
element.
|
||
|
||
- Added support for building and running on/for the Android and
|
||
Windows systems to complement the existing XCB, Wayland, MacOS, and
|
||
iOS implementations.
|
||
|
||
- XCB gained support for mouse/keyboard events using the GstNavigation
|
||
API.
|
||
|
||
- New vulkancolorconvert element for converting between color formats.
|
||
vulkancolorconvert can currently convert to/from all 8-bit RGBA
|
||
formats as well as 8-bit RGBA formats to/from the YUV formats AYUV,
|
||
NV12, and YUY2.
|
||
|
||
- New vulkanviewconvert element for converting between stereo view
|
||
layouts. vulkanviewconvert can currently convert between all of the
|
||
single memory formats (side-by-side, top-bottom, column-interleaved,
|
||
row-interleaved, checkerboard, left, right, mono).
|
||
|
||
- New vulkanimageidentity element for a blit from the input vulkan
|
||
image/s to a new vulkan image/s.
|
||
|
||
- The vulkansink element can now scale the input image to the output
|
||
window/surface size where that information is available.
|
||
|
||
- The vulkanupload element can now configure a transfer from system
|
||
memory to VulkanImage-based memory. Previously, this required two
|
||
vulkanupload elements.
|
||
|
||
Tracing framework and debugging improvements
|
||
|
||
- gst_tracing_get_active_tracers() returns a list of active tracer
|
||
objects. This can be used to interact with tracers at runtime using
|
||
GObject API such as action signals. This has been implemented in the
|
||
leaks tracer for snapshotting and retrieving leaked/active objects
|
||
at runtime.
|
||
|
||
- The leaks tracer can now be interacted with programmatically at
|
||
runtime via GObject action signals:
|
||
|
||
- get-live-object returns a list of live (allocated) traced
|
||
objects
|
||
- log-live-objects logs a list of live objects into the debug log.
|
||
This is the same as sending the SIGUSR1 signal on unix systems,
|
||
but works on all operating systems including Windows.
|
||
- activity-start-tracking, activity-get-checkpoint,
|
||
activity-log-checkpoint, activity-stop-tracking: add support for
|
||
tracking and checkpointing objects, similar to what was
|
||
previously available via SIGUSR2 on unix systems, but works on
|
||
all operating systems including Windows.
|
||
|
||
- various GStreamer gdb debug helper improvements:
|
||
|
||
- new ‘gst-pipeline-tree’ command
|
||
- more gdb helper functions: gst_element_pad(), gst_pipeline() and
|
||
gst_bin_get()
|
||
- support for queries and buffers
|
||
- print more info for segment events, print event seqnums, object
|
||
pointers and structures
|
||
- improve gst-print command to show more pad and element
|
||
information
|
||
|
||
Tools
|
||
|
||
gst-launch-1.0
|
||
|
||
- now prints the pipeline position and duration if available when the
|
||
pipeline is advancing. This is hopefully more user-friendly and
|
||
gives visual feedback on the terminal that the pipeline is actually
|
||
up and running. This can be disabled with the --no-position command
|
||
line option.
|
||
|
||
- the parse-launch pipeline syntax now has support for presets:
|
||
use@preset=<preset-name>" after an element to load a preset.
|
||
|
||
gst-inspect-1.0
|
||
|
||
- new --color command line option to force coloured output even if not
|
||
connected to a tty
|
||
|
||
gst-tester-1.0 (new)
|
||
|
||
- gst-tester-1.0 is a new tool for plugin developers to launch
|
||
.validatetest files with TAP compatible output, meaning it can
|
||
easily and cleanly be integrated with the meson test harness. It
|
||
allows you to use gst-validate (from the gst-devtools module) to
|
||
write integration tests in any GStreamer repository whilst keeping
|
||
the tests as close as possible to the code. The tool transparently
|
||
handles gst-validate being installed or not: if it is not installed
|
||
those integration tests will simply be skipped.
|
||
|
||
gst-play-1.0
|
||
|
||
- interactive keyboard controls now also work on Windows
|
||
|
||
gst-transcoder-1.0 (new)
|
||
|
||
- gst-transcoder-1.0 is a new command line tool to transcode one URI
|
||
into another URI based on the specified encoding profile using the
|
||
new GstTranscoder API (see above).
|
||
|
||
GStreamer RTSP server
|
||
|
||
- Fix issue where the first few packets (i.e. keyframes) could
|
||
sometimes be dropped if the rtsp media pipeline had a live input.
|
||
This was a regression from GStreamer 1.14. There are more fixes
|
||
pending for that which will hopefully land in 1.18.1.
|
||
|
||
- Fix backpressure handling when sending data in TCP interleave mode
|
||
where RTSP requests and responses and RTP/RTCP packets flow over the
|
||
same RTSP TCP connection: The previous implementation would at some
|
||
point stop sending data to other clients when a single client
|
||
stopped consuming data or did not consume data fast enough. This
|
||
obviously created problems for shared media, where the same stream
|
||
from a single producer pipeline is sent to multiple clients. Instead
|
||
we now manage a backlog in the server’s stream-transport component
|
||
and remove slow clients once this backlog exceeds a maximum duration
|
||
(which is currently hardcoded).
|
||
|
||
- Onvif Streaming Specification trick modes support (see section at
|
||
the beginning)
|
||
|
||
- Scale/Speed header support: Speed will deliver the data at the
|
||
requested speed, which means increasing the data bandwidth for
|
||
speeds > 1.0. Scale will attempt to do the same without affecting
|
||
the overall bandwidth requirement vis-a-vis normal playback speed
|
||
(e.g. it might drop data for fast-forward playback).
|
||
|
||
- rtspclientsink: send buffer lists in one go for better performance
|
||
|
||
GStreamer VAAPI
|
||
|
||
- A lot of work was done adding support for media-driver (iHD), the
|
||
new VAAPI driver for Intel, mostly for Gen9 onwards.
|
||
|
||
- Available color formats and frame sizes are now detected at run-time
|
||
according to the context configuration.
|
||
|
||
- Gallium drivers have been re-enabled in the allowed drivers list
|
||
|
||
- Improved the mapping between VA formats and GStreamer formats by
|
||
generating a mapping table at run-time since even among different
|
||
drivers the mapping might be different, particularly for RGB with
|
||
little endianness.
|
||
|
||
- The experimental Flexible Encoding Infrastructure (FEI) elements
|
||
have been removed since they were not really actively maintained or
|
||
tested.
|
||
|
||
- Enhanced the juggling of DMABuf buffers and VASurface metas
|
||
|
||
- New vaapioverlay element: a compositor element using VA VPP blend
|
||
capabilities to accelerate overlaying and compositing. Example
|
||
pipeline:
|
||
|
||
gst-launch-1.0 -vf videotestsrc ! vaapipostproc ! tee name=testsrc ! queue \
|
||
! vaapioverlay sink_1::xpos=300 sink_1::alpha=0.75 name=overlay ! vaapisink \
|
||
testsrc. ! queue ! overlay.
|
||
|
||
vaapipostproc
|
||
|
||
- added video-orientation support, supporting frame mirroring and
|
||
rotation
|
||
|
||
- added cropping support, either via properties (crop-left,
|
||
crop-right, crop-bottom and crop-top) or buffer meta.
|
||
|
||
- new skin-tone-enhancenment-level property which is the iHD
|
||
replacement of the i965 driver’s sink-tone-level. Both are
|
||
incompatible with each other, so both were kept.
|
||
|
||
- handle video colorimetry
|
||
|
||
- support HDR10 tone mapping
|
||
|
||
vaapisink
|
||
|
||
- resurrected wayland backend for non-weston compositors by extracting
|
||
the DMABuf from the VASurface and rendering it.
|
||
|
||
- merged the video overlay API for wayland. Now applications can
|
||
define the “window” to render on.
|
||
|
||
- demoted the vaapisink element to secondary rank since libva
|
||
considers rendering as a second-class feature.
|
||
|
||
VAAPI Encoders
|
||
|
||
- new common target-percentage property which is the desired target
|
||
percentage of bitrate for variable rate control.
|
||
|
||
- encoders now extract their caps from the driver at registration
|
||
time.
|
||
|
||
- vaapivp9enc: added support for low power mode and support for
|
||
profile 2 (profile 0 by default)
|
||
|
||
- vaapih264enc: new max-qp property that sets the maximum quantization
|
||
value. Support for ICQ and QBVR bitrate control mode, adding a
|
||
quality-factor property for these modes. Support baseline profile as
|
||
constrained-baseline
|
||
|
||
- vaapih265enc:
|
||
|
||
- support for main-444 and main-12 encoding profiles.
|
||
- new max-qp property that sets the maximum quantization value.
|
||
- support for ICQ and QBVR bitrate control mode, adding a
|
||
quality-factor property for these modes.
|
||
- handle SCC profiles.
|
||
- num-tile-cols and num-tile-row properties to specify the number
|
||
of tiles to use.
|
||
- the low-delay-b property was deprecated and is now determined
|
||
automatically.
|
||
- improved profile selection through caps.
|
||
|
||
VAAPI Decoders
|
||
|
||
- Decoder surfaces are not bound to their context any longer and can
|
||
thus be created and used dynamically, removing the deadlock
|
||
headache.
|
||
|
||
- Reverse playback is now fluid
|
||
|
||
- Forward Region-of-Interest (ROI) metas downstream
|
||
|
||
- GLTextureUploadMeta uses DMABuf when GEM is not available. Now
|
||
Gallium drivers can use this meta for rendering with EGL.
|
||
|
||
- vaapivp9dec: support for 4:2:2 and 4:4:4 chroma type streams
|
||
|
||
- vaapih265dec: skip all pictures prior to the first I-frame. Enable
|
||
passing range extension flags to the driver. Handle SCC profiles.
|
||
|
||
- vaapijpegdec: support for 4:0:0, 4:1:1, 4:2:2 and 4:4:4 chroma types
|
||
pictures
|
||
|
||
- vaapih264dec: handle baseline streams as constrained-baseline if
|
||
possible and make it more tolerant when encountering unknown NALs
|
||
|
||
GStreamer OMX
|
||
|
||
- omxvideoenc: use new video encoder subframe API to push out slices
|
||
as soon as they’re ready
|
||
|
||
- omxh264enc, omxh265enc: negotiate subframe mode via caps. To enable
|
||
it, force downstream caps to video/x-h264,alignment=nal or
|
||
video/x-h265,alignment=nal.
|
||
|
||
- omxh264enc: Add ref-frames property
|
||
|
||
- Zynq ultrascale+ specific video encoder/decoder improvements:
|
||
|
||
- GRAY8 format support
|
||
- support for alternate fields interlacing mode
|
||
- video encoder: look-ahead, long-term-ref, and long-term-freq
|
||
properties
|
||
|
||
GStreamer Editing Services and NLE
|
||
|
||
- Added nested timelines and subproject support so that GES projects
|
||
can be used as clips, potentially serializing nested projects in the
|
||
main file or referencing external project files.
|
||
|
||
- Implemented an OpenTimelineIO GES formatter. This means GES and
|
||
GStreamer can now load and save projects in all the formats
|
||
supported by otio.
|
||
|
||
- Implemented a GESMarkerList object which allow setting timed
|
||
metadata on any GES object.
|
||
|
||
- Fixed audio rendering issues during clip transition by ensuring that
|
||
a single segment is pushed into encoders.
|
||
|
||
- The GESUriClipAsset API is now MT safe.
|
||
|
||
- Added ges_meta_container_register_static_meta() to allow fixing a
|
||
type for a specific metadata without actually setting a value.
|
||
|
||
- The framepositioner element now handles resizing the project and
|
||
keeps the same positioning when the aspect ratio is not changed .
|
||
|
||
- Reworked the documentation, making it more comprehensive and much
|
||
more detailed.
|
||
|
||
- Added APIs to retrieve natural size and framerate of a clip (for
|
||
example in the case of URIClip it is the framerate/size of the
|
||
underlying file).
|
||
|
||
- ges_container_edit() is now deprecated and GESTimelineElement gained
|
||
the ges_timeline_element_edit() method so the editing API is now
|
||
usable from any element in the timeline.
|
||
|
||
- GESProject::loading was added so applications can be notified about
|
||
when a new timeline starts loading.
|
||
|
||
- Implemented the GstStream API in GESTimeline.
|
||
|
||
- Added a way to add a timeoverlay inside the test source (potentially
|
||
with timecodes).
|
||
|
||
- Added APIs to convert times to frame numbers and vice versa:
|
||
|
||
- ges_timeline_get_frame_time()
|
||
|
||
- ges_timeline_get_frame_at()
|
||
|
||
- ges_clip_asset_get_frame_time()
|
||
|
||
- ges_clip_get_timeline_time_from_source_frame()
|
||
|
||
Quite a few validate tests have been implemented to check the
|
||
behavior for various demuxer/codec formats
|
||
|
||
- Added ges_layer_set_active_for_tracks() which allows muting layers
|
||
for the specified tracks
|
||
|
||
- Deprecated GESImageSource and GESMultiFileSource now that we have
|
||
imagesequencesrc which handles the imagesequence “protocol”
|
||
|
||
- Stopped exposing ‘deinterlacing’ children properties for clip types
|
||
where they do not make sense.
|
||
|
||
- Added support for simple time remapping effects
|
||
|
||
GStreamer validate
|
||
|
||
- Introduced the concept of “Test files” allowing to implement “all
|
||
included” test cases, meaning that inside the file the following can
|
||
be defined:
|
||
|
||
- The application arguments
|
||
- The validate configurations
|
||
- The validate scenario
|
||
|
||
This replaces the previous big dictionary file in
|
||
gst-validate-launcher to implement specific test cases.
|
||
|
||
We set several variables inside the files (as well as inside
|
||
scenarios and config files) to make them relocatable.
|
||
|
||
The file format has been enhanced so it is easier to read and write,
|
||
for example line ending with a coma or (curly) brackets can now be
|
||
used as continuation marker so you do not need to add \ at the end
|
||
of lines to write a structure on several lines.
|
||
|
||
- Support the imagesequence “protocol” and added integration tests for
|
||
it.
|
||
|
||
- Added action types to allow the scenario to run the Test Clock for
|
||
better reproducibility of tests.
|
||
|
||
- Support generating tests to check that seeking is frame accurate
|
||
(base on ssim).
|
||
|
||
- Added ways to record buffers checksum (in different ways) in the
|
||
validateflow module.
|
||
|
||
- Added vp9 encoding tests.
|
||
|
||
- Enhanced seeking action types implementation to allow support for
|
||
segment seeks.
|
||
|
||
- Output improvements:
|
||
|
||
- Logs are now in markdown formats (and bat is used to dump them
|
||
if available).
|
||
- File format issues in scenarios/configs/tests files are nicely
|
||
reported with the line numbers now.
|
||
|
||
GStreamer Python Bindings
|
||
|
||
- Python 2.x is no longer supported
|
||
|
||
- Support mapping buffers without any memcpy:
|
||
|
||
- Added a ContextManager to make the API more pythonic
|
||
|
||
with buf.map(Gst.MapFlags.READ | Gst.MapFlags.WRITE) as info:
|
||
info.data[42] = 0
|
||
|
||
- Added high-level helper API for constructing pipelines:
|
||
|
||
- Gst.Bin.make_and_add(factory_name, instance_name=None)
|
||
- Gst.Element.link_many(element, ...)
|
||
|
||
GStreamer C# Bindings
|
||
|
||
- Bind gst_buffer_new_wrapped() manually to fix memory handling.
|
||
|
||
- Fix gst_promise_new_with_change_func() where bindgen didn’t properly
|
||
detect the func as a closure.
|
||
|
||
- Declare GstVideoOverlayComposition and GstVideoOverlayRectangle as
|
||
opaque type and subclasses of Gst.MiniObject. This changes the API
|
||
but without this all usage will cause memory corruption or simply
|
||
not work.
|
||
|
||
- on Windows, look for gstreamer, glib and gobject DLLs using the MSVC
|
||
naming convention (i.e. gstvideo-1.0-0.dll instead of
|
||
libgstvideo-1.0-0.dll).
|
||
|
||
The names of these DLLs have to be hardcoded in the bindings, and
|
||
most C# users will probably be using the Microsoft toolchain anyway.
|
||
|
||
This means that the MSVC compiler is now required to build the
|
||
bindings, MingW will no longer work out of the box.
|
||
|
||
GStreamer Rust Bindings and Rust Plugins
|
||
|
||
The GStreamer Rust bindings are released separately with a different
|
||
release cadence that’s tied to gtk-rs, but the latest release has
|
||
already been updated for the new GStreamer 1.18 API, so there’s
|
||
absolutely no excuse why your next GStreamer application can’t be
|
||
written in Rust anymore.
|
||
|
||
gst-plugins-rs, the module containing GStreamer plugins written in Rust,
|
||
has also seen lots of activity with many new elements and plugins.
|
||
|
||
What follows is a list of elements and plugins available in
|
||
gst-plugins-rs, so people don’t miss out on all those potentially useful
|
||
elements that have no C equivalent.
|
||
|
||
Rust audio plugins
|
||
|
||
- audiornnoise: New element for audio denoising which implements the
|
||
noise removal algorithm of the Xiph RNNoise library, in Rust
|
||
- rsaudioecho: Port of the audioecho element from gst-plugins-good
|
||
rsaudioloudnorm: Live audio loudness normalization element based on
|
||
the FFmpeg af_loudnorm filter
|
||
- claxondec: FLAC lossless audio codec decoder element based on the
|
||
pure-Rust claxon implementation
|
||
- csoundfilter: Audio filter that can use any filter defined via the
|
||
Csound audio programming language
|
||
- lewtondec: Vorbis audio decoder element based on the pure-Rust
|
||
lewton implementation
|
||
|
||
Rust video plugins
|
||
|
||
- cdgdec/cdgparse: Decoder and parser for the CD+G video codec based
|
||
on a pure-Rust CD+G implementation, used for example by karaoke CDs
|
||
- cea608overlay: CEA-608 Closed Captions overlay element
|
||
- cea608tott: CEA-608 Closed Captions to timed-text (e.g. VTT or SRT
|
||
subtitles) converter
|
||
- tttocea608: CEA-608 Closed Captions from timed-text converter
|
||
- mccenc/mccparse: MacCaption Closed Caption format encoder and parser
|
||
- sccenc/sccparse: Scenarist Closed Caption format encoder and parser
|
||
- dav1dec: AV1 video decoder based on the dav1d decoder implementation
|
||
by the VLC project
|
||
- rav1enc: AV1 video encoder based on the fast and pure-Rust rav1e
|
||
encoder implementation
|
||
- rsflvdemux: Alternative to the flvdemux FLV demuxer element from
|
||
gst-plugins-good, not feature-equivalent yet
|
||
- rsgifenc/rspngenc: GIF/PNG encoder elements based on the pure-Rust
|
||
implementations by the image-rs project
|
||
|
||
Rust text plugins
|
||
|
||
- textwrap: Element for line-wrapping timed text (e.g. subtitles) for
|
||
better screen-fitting, including hyphenation support for some
|
||
languages
|
||
|
||
Rust network plugins
|
||
|
||
- reqwesthttpsrc: HTTP(S) source element based on the Rust
|
||
reqwest/hyper HTTP implementations and almost feature-equivalent
|
||
with the main GStreamer HTTP source souphttpsrc
|
||
- s3src/s3sink: Source/sink element for the Amazon S3 cloud storage
|
||
- awstranscriber: Live audio to timed text transcription element using
|
||
the Amazon AWS Transcribe API
|
||
|
||
Generic Rust plugins
|
||
|
||
- sodiumencrypter/sodiumdecrypter: Encryption/decryption element based
|
||
on libsodium/NaCl
|
||
- togglerecord: Recording element that allows to pause/resume
|
||
recordings easily and considers keyframe boundaries
|
||
- fallbackswitch/fallbacksrc: Elements for handling potentially
|
||
failing (network) sources, restarting them on errors/timeout and
|
||
showing a fallback stream instead
|
||
- threadshare: Set of elements that provide alternatives for various
|
||
existing GStreamer elements but allow to share the streaming threads
|
||
between each other to reduce the number of threads
|
||
- rsfilesrc/rsfilesink: File source/sink elements as replacements for
|
||
the existing filesrc/filesink elements
|
||
|
||
Build and Dependencies
|
||
|
||
- The Autotools build system has finally been removed in favour of the
|
||
Meson build system. Developers who currently use gst-uninstalled
|
||
should move to gst-build.
|
||
|
||
- API and plugin documentation are no longer built with gtk_doc. The
|
||
gtk_doc documentation has been removed in favour of a new unified
|
||
documentation module built with hotdoc (also see “Documentation
|
||
improvements” section below). Distributors should use the
|
||
documentation release tarball instead of trying to package hotdoc
|
||
and building the documentation from scratch.
|
||
|
||
- gst-plugins-bad now includes an internal copy of libusrsctp, as
|
||
there are problems in usrsctp with global shared state, lack of API
|
||
stability guarantees, and the absence of any kind of release
|
||
process. We also can’t rely on distros shipping a version with the
|
||
fixes we need. Both firefox and Chrome bundle their own copies too.
|
||
It is still possible to build against an external copy of usrsctp if
|
||
so desired.
|
||
|
||
- nvcodec no longer needs the NVIDIA NVDEC/NVENC SDKs available at
|
||
build time, only at runtime. This allows distributions to ship this
|
||
plugin by default and it will just start to work when the required
|
||
run-time SDK libraries are installed by the user, without users
|
||
needing to build and install the plugin from source.
|
||
|
||
- the gst-editing-services tarball is now named gst-editing-services
|
||
for consistency (used to be gstreamer-editing-services).
|
||
|
||
- the gst-validate tarball has been superseded by the gst-devtools
|
||
tarball for consistency with the git module name.
|
||
|
||
gst-build
|
||
|
||
gst-build is a meta-module and serves primarily as our uninstalled
|
||
development environment. It makes it easy to build most of GStreamer,
|
||
but unlike Cerbero it only comes with a limited number of external
|
||
dependencies that can be built as subprojects if they are not found on
|
||
the system.
|
||
|
||
gst-build is based on Meson and replaces the old autotools
|
||
gst-uninstalled script.
|
||
|
||
- The ‘uninstalled’ target has been renamed to ‘devenv’
|
||
|
||
- Experimental gstreamer-full library containing all built plugins and
|
||
their deps when building with -Ddefault_library=static. A monolithic
|
||
library is easier to distribute, and may be required in some
|
||
environments. GStreamer core, GLib and GObject are always included,
|
||
but external dependencies are still dynamically linked. The
|
||
gst-full-libraries meson option allows adding other GStreamer
|
||
libraries to the gstreamer-full build. This is an experiment for now
|
||
and its behaviour or API may still change in future releases.
|
||
|
||
- Add glib-networking as a subproject when glib is a subproject and
|
||
load gio modules in the devenv, tls option control whether to use
|
||
openssl or gnutls.
|
||
|
||
- git-worktree: Allow multiple worktrees for subproject branches
|
||
|
||
- Guard against meson being run from inside the uninstalled devenv, as
|
||
this might have unexpected consequences.
|
||
|
||
- our ffmpeg and x264 meson ports have been updated to the latest
|
||
stable version (you might need to update the subprojects checkout
|
||
manually though, or just remove the checkouts so meson checks out
|
||
the latest version again; improvements for this are pending in
|
||
meson, but not merged yet).
|
||
|
||
Cerbero
|
||
|
||
Cerbero is a meta build system used to build GStreamer plus dependencies
|
||
on platforms where dependencies are not readily available, such as
|
||
Windows, Android, iOS and macOS.
|
||
|
||
General improvements
|
||
|
||
- Recipe build steps are done in parallel wherever possible. This
|
||
leads to massive improvements in overall build time.
|
||
- Several recipes were ported to Meson, which improved build times
|
||
- Moved from using both GnuTLS and OpenSSL to only OpenSSL
|
||
- Moved from yasm to nasm for all assembly compilation
|
||
- Support zsh when running the cerbero shell command
|
||
- Numerous version upgrades for dependencies
|
||
- Default to xz for tarball binary packages. bz2 can be selected with
|
||
the --compress-method option to package.
|
||
- Added boolean variant for controlling the optimization level:
|
||
-v optimization
|
||
- Ship .pc pkgconfig files for all plugins in the binary packages
|
||
- CMake and nasm will only be built by Cerbero if the system versions
|
||
are unusable
|
||
- The nvcodec variant was removed and the nvcodec plugin is built by
|
||
default now (as it no longer requires the SDK to be installed at
|
||
build time, only at runtime)
|
||
|
||
macOS / iOS
|
||
|
||
- Minimum iOS SDK version bumped to 11.0
|
||
- Minimum macOS SDK version bumped to 10.11
|
||
- No longer need to manually add support for newer iOS SDK versions
|
||
- Added Vulkan elements via MoltenVK
|
||
- Build times were improved by code-signing all build tools
|
||
- macOS framework ships all gstreamer libraries instead of an outdated
|
||
subset
|
||
- Ship pkg-config in the macOS framework package
|
||
- fontconfig: Fix EXC_BAD_ACCESS crash on iOS ARM64
|
||
- Improved App Store compatibility by setting LC_VERSION_MIN_MACOSX,
|
||
fixing relocations, and improved bitcode support
|
||
|
||
Windows
|
||
|
||
- MinGW-GCC toolchain was updated to 8.2. It uses the Universal CRT
|
||
instead of MSVCRT which eliminates cross-CRT issues in the Visual
|
||
Studio build.
|
||
- Require Windows 7 or newer for running binaries produced by Cerbero
|
||
- Require Windows x86_64 for running Cerbero to build binary packages
|
||
- Cerbero no longer uses C:/gstreamer/1.0 as a prefix when building.
|
||
That prefix is reserved for use by the MSI installers.
|
||
- Several recipes can now be buit with Visual Studio instead of MinGW.
|
||
Ported to meson: opus, libsrtp, harfbuzz, cairo, openh264, libsoup,
|
||
libusrsctp. Existing build system: libvpx, openssl.
|
||
- Support building using Visual Studio for 32-bit x86. Previously we
|
||
only supported building for 32-bit x86 using the MinGW toolchain.
|
||
- Fixed annoying msgmerge popups in the middle of cerbero builds
|
||
- Added configuration options vs_install_path and vs_install_version
|
||
for specifying custom search locations for older Visual Studio
|
||
versions that do not support vswhere. You can set these in
|
||
~/.cerbero/cerbero.cbc where ~ is the MSYS homedir, not your Windows
|
||
homedir.
|
||
- New Windows-specific plugins: d3d11, mediafoundation, wasapi2
|
||
- Numerous compatibility and reliability fixes when running Cerbero on
|
||
Windows, especially non-English locales
|
||
- proxy-libintl now exports the same symbols as gettext, which makes
|
||
it a drop-in replacement
|
||
- New mapping variant for selecting the Visual Studio CRT to use:
|
||
-v vscrt=<value>. Valid values are md, mdd, and auto (default). A
|
||
separate prefix is used when building with either md (release) or
|
||
mdd (debug), and the outputted package will have +debug in the
|
||
filename. This variant is also used for selecting the correct Qt
|
||
libraries (debug vs release) to use when building with -v qt5 on
|
||
Windows.
|
||
- Support cross-compile on Windows to Windows ARM64 and ARMv7
|
||
- Support cross-compile on Windows to the Universal Windows Platform
|
||
(UWP). Only the subset of plugins that can be built entirely with
|
||
Visual Studio will be selected in this case. To do so, use the
|
||
config/cross-uwp-universal.cbc configuration, which will build
|
||
ARM64, x86, and x86_64 binaries linked to the release CRT, with
|
||
optimizations enabled, and debugging turned on. You can combine this
|
||
with -v vscrt=mdd to produce binaries linked to the debug CRT. You
|
||
can turn off optimizations with the -v nooptimization variant.
|
||
|
||
Windows MSI installer
|
||
|
||
- Require Windows 7 or newer for running GStreamer
|
||
- Fixed some issues with shipping of pkg-config in the Windows
|
||
installers
|
||
- Plugin PDB debug files are now shipped in the development package,
|
||
not the runtime package
|
||
- Ship installers for 32-bit binaries built with Visual Studio
|
||
- Ship debug and release “universal” (ARM64, X86, and X86_64) tarballs
|
||
built for the Universal Windows Platform
|
||
- Windows MSI installers now install into separate prefixes when
|
||
building with MSVC and MinGW. Previously both would be installed
|
||
into C:/gstreamer/1.0/x86 or C:/gstreamer/1.0/x86_64. Now, the
|
||
installation prefixes are:
|
||
|
||
----------------------------------------------------------------------------------------------------------------
|
||
Target Path Build options
|
||
--------------------------- ------------------------------------ -----------------------------------------------
|
||
MinGW 32-bit C:/gstreamer/1.0/mingw_x86 -c config/win32.cbc
|
||
|
||
MinGW 64-bit C:/gstreamer/1.0/mingw_x86_64 -c config/win64.cbc
|
||
|
||
MSVC 32-bit C:/gstreamer/1.0/msvc_x86 -c config/win32.cbc -v visualstudio
|
||
|
||
MSVC 64-bit C:/gstreamer/1.0/msvc_x86_64 -c config/win64.cbc -v visualstudio
|
||
|
||
MSVC 32-bit (debug) C:/gstreamer/1.0/msvc-debug_x86 -c config/win32.cbc -v visualstudio,vscrt=mdd
|
||
|
||
MSVC 64-bit (debug) C:/gstreamer/1.0/msvc-debug_x86_64 -c config/win64.cbc -v visualstudio,vscrt=mdd
|
||
----------------------------------------------------------------------------------------------------------------
|
||
|
||
Note: UWP binary packages are tarballs, not MSI installers.
|
||
|
||
Linux
|
||
|
||
- Support creating MSI installers using WiX when cross-compiling to
|
||
Windows
|
||
- Support running cross-windows binaries with Wine when using the
|
||
shell and runit cerbero commands
|
||
- Added bash-completion support inside the cerbero shell on Linux
|
||
- Require a system-wide installation of openssl on Linux
|
||
- Added variant -v vaapi to build gstreamer-vaapi and the new gstva
|
||
plugin
|
||
- Debian packaging was disabled because it does not work. Help in
|
||
fixing this is appreciated.
|
||
- Trimmed the list of packages needed for bootstrap on Linux
|
||
|
||
Android
|
||
|
||
- Updated to NDK r21
|
||
- Support Vulkan
|
||
- Support Qt 5.14+ binary package layout
|
||
|
||
Platform-specific changes and improvements
|
||
|
||
Android
|
||
|
||
- opensles: Remove hard-coded buffer-/latency-time values and allow
|
||
openslessink to handle 48kHz streams.
|
||
|
||
- photography interface and camera source: Add additional settings
|
||
relevant to Android such as: Exposure mode property, extra colour
|
||
tone values (aqua, emboss, sketch, neon), extra scene modes
|
||
(backlight, flowers, AR, HDR), and missing virtual methods for
|
||
exposure mode, analog gain, lens focus, colour temperature, min &
|
||
max exposure time. Add new effects and scene modes to Camera
|
||
parameters.
|
||
|
||
macOS and iOS
|
||
|
||
- vtdec can now output to Vulkan-backed memory for zerocopy support
|
||
with the Vulkan elements.
|
||
|
||
Windows
|
||
|
||
- d3d11videosink: new Direct3D11-based video sink with support for
|
||
HDR10 rendering if supported.
|
||
|
||
- Hardware-accelerated video decoding on Windows via DXVA2 /
|
||
Direct3D11 using native Windows APIs rather than per-vendor SDKs
|
||
(like MSDK for Intel or NVCODEC for NVidia). Plus modern Direct3D11
|
||
integration rather than the almost 20-year old Direct3D9 from
|
||
Windows XP times used in d3dvideosink. Formats supported for
|
||
decoding are H.264, H.265, VP8, and VP9, and zero-copy operation
|
||
should be supported in combination with the new d3d11videosink. See
|
||
Seungha’s blog post “Windows DXVA2 (via Direct3D 11) Support in
|
||
GStreamer 1.17” for more details.
|
||
|
||
- Microsoft Media Foundation plugin for hardware-accelerated video
|
||
encoding on Windows using native Windows APIs rather than per-vendor
|
||
SDKs. Formats supported for encoding are H.264, H.265 and VP9. Also
|
||
includes audio encoders for AAC and MP3. See Seungha’s blog post
|
||
“Bringing Microsoft Media Foundation to GStreamer” for some more
|
||
details about this.
|
||
|
||
- new mfvideosrc video capture source element using the latest Windows
|
||
APIs rather than ancient APIs used by ksvideosrc/winks. ksvideosrc
|
||
should be considered deprecated going forward.
|
||
|
||
- d3d11: add d3d11convert, a color space conversion and rescaling
|
||
element using shaders, and introduce d3d11upload and d3d11download
|
||
elements that work just like glupload and gldownload but for D3D11.
|
||
|
||
- Universal Windows Platform (UWP) support, including official
|
||
GStreamer binary packages for it. Check out Nirbheek’s latest blog
|
||
post “GStreamer 1.18 supports the Universal Windows Platform” for
|
||
more details.
|
||
|
||
- systemclock correctness and reliability fixes, and also don’t start
|
||
the system clock at 0 any longer (which shouldn’t make any
|
||
difference to anyone, as absolute clock time values are supposed to
|
||
be meaningless in themselves, only the rate of increase matters).
|
||
|
||
- toolchain specific plugin registry: the registry cache is now named
|
||
differently for MSVC and MinGW toolchains/packages, which should
|
||
avoid problems when switching between binaries built with a
|
||
different toolchain.
|
||
|
||
- new wasapi2 plugin mainly to support UWP applications. The core
|
||
logic of this plugin is almost identical to existing wasapi plugin,
|
||
but the main target is Windows 10 and UWP. This plugin uses WinRT
|
||
APIs, so will likely not work on Windows 8 or older. Unlike the
|
||
existing wasapi plugin, this plugin supports automatic stream
|
||
routing (auto fallback when device was removed) and device level
|
||
mute/volume control. Exclusive streaming mode is not supported,
|
||
however, and loopback features are not implemented yet. It is also
|
||
only possible to build this plugin with MSVC and the Windows 10 SDK,
|
||
it can’t be cross-compiled with the MingW toolchain.
|
||
|
||
- new dxgiscreencapsrc element which uses the Desktop Duplication API
|
||
to capture the desktop screen at high speed. This is only supported
|
||
on Windows 8 or later. Compared to the existing elements
|
||
dxgiscreencapsrc offers much better performance, works in High DPI
|
||
environments and draws an accurate mouse cursor.
|
||
|
||
- d3dvideosink was downgraded to secondary rank, d3d11videosink is
|
||
preferred now. Support OverlayComposition for GPU overlay
|
||
compositing of subtitles and logos.
|
||
|
||
- debug log output fixes, esp. with a non-UTF8 locale/codepage
|
||
|
||
- speex, jack: fixed crashes on Windows caused by cross-CRT issues
|
||
|
||
- gst-play-1.0 interactive keyboard controls now also work on Windows
|
||
|
||
Linux
|
||
|
||
- kmssink: Add support for P010 and P016 formats
|
||
|
||
- vah264dec: new experimental va plugin with an element for H.264
|
||
decoding with VA-API. This novel approach, different from
|
||
gstreamer-vaapi, uses the gstcodecs library for decoder state
|
||
handling, which it is hoped will make for cleaner code because it
|
||
uses VA-API without further layers or wrappers. Check out Víctor’s
|
||
blog post “New VA-API H.264 decoder in gst-plugins-bad” for the full
|
||
lowdown and the limitations of this new plugin, and how to give it a
|
||
spin.
|
||
|
||
- v4l2codecs: introduce a V4L2 CODECs Accelerator. This plugin will
|
||
support the new CODECs uAPI in the Linux kernel, which consists of
|
||
an accelerator interface similar to DXVA, NVDEC, VDPAU and VAAPI. So
|
||
far H.264 and VP8 are supported. This is used on certain embedded
|
||
systems such as i.mx8m, rk3288, rk3399, Allwinner H-series SoCs.
|
||
|
||
Documentation improvements
|
||
|
||
- unified documentation containing tutorials, API docs, plugin docs,
|
||
etc. all under one roof, shipped in form of a documentation release
|
||
tarball containing both devhelp and html documentation.
|
||
|
||
- all documentation is now generated using hotdoc, gtk-doc is no
|
||
longer used. Distributors should use the above-mentioned
|
||
documentation release tarball instead of trying to package hotdoc
|
||
and building the documentation from scratch.
|
||
|
||
- there is now documentation for wrapper plugins like gst-libav and
|
||
frei0r, as well as tracer plugins.
|
||
|
||
- for more info, check out Thibault’s “GStreamer Documentation”
|
||
lightning talk from the 2019 GStreamer Conference.
|
||
|
||
- new API for plugins to support the documentation system:
|
||
|
||
- new GParamSpecFlag GST_PARAM_DOC_SHOW_DEFAULT to make
|
||
gst-inspect-1.0 (and the documentation) show the paramspec’s
|
||
default value rather than the actually set value as default
|
||
- GstPadTemplate getter and setter for “documentation caps”,
|
||
gst_pad_template_set_documentation_caps() and
|
||
gst_pad_template_get_documentation_caps(): This can be used in
|
||
elements where the caps of pad templates are dynamically
|
||
generated and/or dependent on the environment, to override the
|
||
caps shown in the documentation (usually to advertise the full
|
||
set of possible caps).
|
||
- gst_type_mark_as_plugin_api() for marking types as plugin API,
|
||
used for plugin-internal types like enums, flags, pad
|
||
subclasses, boxed types, and such.
|
||
|
||
Possibly Breaking Changes
|
||
|
||
- GstVideo: the canonical list of raw video formats (for use in caps)
|
||
has been reordered, so video elements such as videotestsrc or
|
||
videoconvert might negotiate to a different format now than before.
|
||
The new format might be a higher-quality format or require more
|
||
processing overhead, which might affect pipeline performance.
|
||
|
||
- mpegtsdemux used to wrongly advertise H.264 and H.265 video
|
||
elementary streams as alignment=nal. This has now been fixed and
|
||
changed to alignment=none, which means an h264parse or h265parse
|
||
element is now required after tsdemux for some pipelines where there
|
||
wasn’t one before, e.g. in transmuxing scenarios (tsdemux ! tsmux).
|
||
Pipelines without such a parser may now fail to link or error out at
|
||
runtime. As parsers after demuxers and before muxers have been
|
||
generally required for a long time now it is hoped that this will
|
||
only affect a small number of applications or pipelines.
|
||
|
||
- The Android opensles audio source and sink used to have hard-coded
|
||
buffer-/latency-time values of 20ms. This is no longer needed with
|
||
newer Android versions and has now been removed. This means a higher
|
||
or lower value might now be negotiated by default, which can affect
|
||
pipeline performance and latency.
|
||
|
||
Known Issues
|
||
|
||
- None in particular
|
||
|
||
Contributors
|
||
|
||
Aaron Boxer, Adam Duskett, Adam x Nilsson, Adrian Negreanu, Akinobu
|
||
Mita, Alban Browaeys, Alcaro, Alexander Lapajne, Alexandru Băluț, Alex
|
||
Ashley, Alex Hoenig, Alicia Boya García, Alistair Buxton, Ali Yousuf,
|
||
Ambareesh “Amby” Balaji, Amr Mahdi, Andoni Morales Alastruey, Andreas
|
||
Frisch, Andre Guedes, Andrew Branson, Andrey Sazonov, Antonio Ospite,
|
||
aogun, Arun Raghavan, Askar Safin, AsociTon, A. Wilcox, Axel Mårtensson,
|
||
Ayush Mittal, Bastian Bouchardon, Benjamin Otte, Bilal Elmoussaoui,
|
||
Brady J. Garvin, Branko Subasic, Camilo Celis Guzman, Carlos Rafael
|
||
Giani, Charlie Turner, Cheng-Chang Wu, Chris Ayoup, Chris Lord,
|
||
Christoph Reiter, cketti, Damian Hobson-Garcia, Daniel Klamt, Daniel
|
||
Molkentin, Danny Smith, David Bender, David Gunzinger, David Ing, David
|
||
Svensson Fors, David Trussel, Debarshi Ray, Derek Lesho, Devarsh
|
||
Thakkar, dhilshad, Dimitrios Katsaros, Dmitriy Purgin, Dmitry Shusharin,
|
||
Dominique Leuenberger, Dong Il Park, Doug Nazar, dudengke, Dylan McCall,
|
||
Dylan Yip, Ederson de Souza, Edward Hervey, Eero Nurkkala, Eike Hein,
|
||
ekwange, Eric Marks, Fabian Greffrath, Fabian Orccon, Fabio D’Urso,
|
||
Fabrice Bellet, Fabrice Fontaine, Fanchao L, Felix Yan, Fernando
|
||
Herrrera, Francisco Javier Velázquez-García, Freyr, Fuwei Tang, Gaurav
|
||
Kalra, George Kiagiadakis, Georgii Staroselskii, Georg Lippitsch, Georg
|
||
Ottinger, gla, Göran Jönsson, Gordon Hart, Gregor Boirie, Guillaume
|
||
Desmottes, Guillermo Rodríguez, Haakon Sporsheim, Haihao Xiang, Haihua
|
||
Hu, Havard Graff, Håvard Graff, Heinrich Kruger, He Junyan, Henry
|
||
Wilkes, Hosang Lee, Hou Qi, Hu Qian, Hyunjun Ko, ibauer, Ignacio Casal
|
||
Quinteiro, Ilya Smelykh, Jake Barnes, Jakub Adam, James Cowgill, James
|
||
Westman, Jan Alexander Steffens, Jan Schmidt, Jan Tojnar, Javier Celaya,
|
||
Jeffy Chen, Jennifer Berringer, Jens Göpfert, Jérôme Laheurte, Jim
|
||
Mason, Jimmy Ohn, J. Kim, Joakim Johansson, Jochen Henneberg, Johan
|
||
Bjäreholt, Johan Sternerup, John Bassett, Jonas Holmberg, Jonas Larsson,
|
||
Jonathan Matthew, Jordan Petridis, Jose Antonio Santos Cadenas, Josep
|
||
Torra, Jose Quaresma, Josh Matthews, Joshua M. Doe, Juan Navarro,
|
||
Juergen Werner, Julian Bouzas, Julien Isorce, Jun-ichi OKADA, Justin
|
||
Chadwell, Justin Kim, Keri Henare, Kevin JOLY, Kevin King, Kevin Song,
|
||
Knut Andre Tidemann, Kristofer Björkström, krivoguzovVlad, Kyrylo
|
||
Polezhaiev, Lenny Jorissen, Linus Svensson, Loïc Le Page, Loïc Minier,
|
||
Lucas Stach, Ludvig Rappe, Luka Blaskovic, luke.lin, Luke Yelavich,
|
||
Marcin Kolny, Marc Leeman, Marco Felsch, Marcos Kintschner, Marek
|
||
Olejnik, Mark Nauwelaerts, Markus Ebner, Martin Liska, Martin Theriault,
|
||
Mart Raudsepp, Matej Knopp, Mathieu Duponchelle, Mats Lindestam, Matthew
|
||
Read, Matthew Waters, Matus Gajdos, Maxim Paymushkin, Maxim P.
|
||
Dementiev, Michael Bunk, Michael Gruner, Michael Olbrich, Miguel París
|
||
Díaz, Mikhail Fludkov, Milian Wolff, Millan Castro, Muhammet Ilendemli,
|
||
Nacho García, Nayana Topolsky, Nian Yan, Nicola Murino, Nicolas
|
||
Dufresne, Nicolas Pernas Maradei, Niels De Graef, Nikita Bobkov, Niklas
|
||
Hambüchen, Nirbheek Chauhan, Ognyan Tonchev, okuoku, Oleksandr
|
||
Kvl,Olivier Crête, Ondřej Hruška, Pablo Marcos Oltra, Patricia Muscalu,
|
||
Peter Seiderer, Peter Workman, Philippe Normand, Philippe Renon, Philipp
|
||
Zabel, Pieter Willem Jordaan, Piotr Drąg, Ralf Sippl, Randy Li, Rasmus
|
||
Thomsen, Ratchanan Srirattanamet, Raul Tambre, Ray Tiley, Richard
|
||
Kreckel, Rico Tzschichholz, R Kh, Robert Rosengren, Robert Tiemann,
|
||
Roman Shpuntov, Roman Sivriver, Ruben Gonzalez, Rubén Gonzalez,
|
||
rubenrua, Ryan Huang, Sam Gigliotti, Santiago Carot-Nemesio, Saunier
|
||
Thibault, Scott Kanowitz, Sebastian Dröge, Sebastiano Barrera, Seppo
|
||
Yli-Olli, Sergey Nazaryev, Seungha Yang, Shinya Saito, Silvio
|
||
Lazzeretti, Simon Arnling Bååth, Siwon Kang, sohwan.park, Song Bing,
|
||
Soohyun Lee, Srimanta Panda, Stefano Buora, Stefan Sauer, Stéphane
|
||
Cerveau, Stian Selnes, Sumaid Syed, Swayamjeet, Thiago Santos, Thibault
|
||
Saunier, Thomas Bluemel, Thomas Coldrick, Thor Andreassen, Tim-Philipp
|
||
Müller, Ting-Wei Lan, Tobias Ronge, trilene, Tulio Beloqui, U. Artie
|
||
Eoff, VaL Doroshchuk, Varunkumar Allagadapa, Vedang Patel, Veerabadhran
|
||
G, Víctor Manuel Jáquez Leal, Vivek R, Vivia Nikolaidou, Wangfei, Wang
|
||
Zhanjun, Wim Taymans, Wonchul Lee, Xabier Rodriguez Calvar, Xavier
|
||
Claessens, Xidorn Quan, Xu Guangxin, Yan Wang, Yatin Maan, Yeongjin
|
||
Jeong, yychao, Zebediah Figura, Zeeshan Ali, Zeid Bekli, Zhiyuan Sraf,
|
||
Zoltán Imets,
|
||
|
||
… and many others who have contributed bug reports, translations, sent
|
||
suggestions or helped testing.
|
||
|
||
Stable 1.18 branch
|
||
|
||
After the 1.18.0 release there will be several 1.18.x bug-fix releases
|
||
which will contain bug fixes which have been deemed suitable for a
|
||
stable branch, but no new features or intrusive changes will be added to
|
||
a bug-fix release usually. The 1.18.x bug-fix releases will be made from
|
||
the git 1.18 branch, which will be a stable branch.
|
||
|
||
1.18.0
|
||
|
||
1.18.0 was released on 7 September 2020.
|
||
|
||
Schedule for 1.20
|
||
|
||
Our next major feature release will be 1.20, and 1.19 will be the
|
||
unstable development version leading up to the stable 1.20 release. The
|
||
development of 1.19/1.20 will happen in the git master branch.
|
||
|
||
The plan for the 1.20 development cycle is yet to be confirmed, but it
|
||
is now expected that feature freeze will take place some time in January
|
||
2021, with the first 1.20 stable release around February/March 2021.
|
||
|
||
1.20 will be backwards-compatible to the stable 1.18, 1.16, 1.14, 1.12,
|
||
1.10, 1.8, 1.6, 1.4, 1.2 and 1.0 release series.
|
||
|
||
------------------------------------------------------------------------
|
||
|
||
These release notes have been prepared by Tim-Philipp Müller with
|
||
contributions from Mathieu Duponchelle, Matthew Waters, Nirbheek
|
||
Chauhan, Sebastian Dröge, Thibault Saunier, and Víctor Manuel Jáquez
|
||
Leal.
|
||
|
||
License: CC BY-SA 4.0
|