The patch set is ready now.
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v8: winegstreamer: Implement finalize for media sink.
winestreamer: Implement wg_muxer_finalize.
winegstreamer: Introduce media_sink_write_stream.
winestreamer: Implement wg_muxer_{get,copy,free}_buffer.
winegstreamer: Implement ProcessSample for media sink.
winegstreamer: Implement wg_muxer_push_sample.
winegstreamer: Implement wg_muxer_add_stream.
winegstreamer: Create wg_muxer for media sink.
winegstreamer: Implement seeking query for wg_muxer sink pad.
winegstreamer: Introduce new wg_muxer struct.
winegstreamer: Add MFMPEG4SinkClassFactory.
mf/tests: Use h264 and aac in mp4 media sink tests.
winegstreamer: Add codec data to h264 format.
winegstreamer: Add push_event wrapper.
https://gitlab.winehq.org/wine/wine/-/merge_requests/3303