This is to avoid exposing a decoder for which we don't support any output format. This happens on platform using vendor formats or not yet supported tiles formats. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1439>
Implement a MPEG2 V4L2 decoder element based on the previous h264 implementation. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1013>