This regression was introduced by https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1102 and has been present since 1.18 * Stream Type 0x06 is defined in the base mpeg-ts specification as Private PES Packets. Determining the content should be solely based on descriptors found within the PMT. * This was abused in that commit by defining a "bluray-only" stream type for AC4 : `ST_BD_AUDIO_AC4` * This should be entirely handled in the regular private pes handling further down in the code Fixes #1154 Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2175>