Release related issues

Issues and merge requests reported against or relating to a 1.22 version or branch

For issues or MRs that relate to the AAC family of audio codecs

For issues or MRs that relate to the Opus audio codec

For issues or MRs that haven't seen activity for a while and where it's unclear if they are still relevant.

For issues or MRs that relate to the MPEG-2 video codec

For issues or MRs that relate to the VP9 video codec

For issues or MRs that relate to the VP8 video codec

For issues or MRs that relate to the H.264 video codec

For issues or MRs that relate to the H.265 video codec

For issues or MRs that relate to the AV1 video codec

For issues or MRs that relate to the GstDiscoverer API and gst-discoverer-1.0 command line tool

For issues or MRs that relate to the ASF / Windows Media container format

For issues or MRs that relate to the Ogg container format

For issues or MRs that relate to the GstAggregator base class and GstAudioAggregator and GstVideoAggregator subclasses

For issues or MRs that relate to the Matroska container format

For issues or MRs that relate to the MP4 / QuickTime / ISOBMFF container format

For issues or MRs that relate to closed captions

For issues or MRs that relate to the Qt toolkit and the GStreamer QML/Qt plugins

For issues or MRs that relate to media type detection