[FFmpeg-devel] [RFC 00/13] flvdec/flvenc: add support for enhanced rtmp codecs and multitrack/multichannel

[Steven Liu]

Timo Rothenpieler <timo at rothenpieler.org> 于2024年5月21日周二 17:03写道：
>
> This is based on the preliminary spec for enhanced rtmp v2:
> https://veovera.org/docs/enhanced/enhanced-rtmp-v2
>
> The spec is not final, and can still undergo breaking changes, hence this set is purely for comments and review, and not ready to be merged until the final v2 spec is published.
>
> There are no samples out in the wild yet, so testing interoperability with other software has not happened yet either.
> Specially the two other multitrack modes, where multiple tracks are in the same packet, have not been tested at all, since no software can write such files.
Yes, there have reconnect function in v2
And i cannot sure there maybe have some problem in multitrack mode,
different codecs type, change amount the tracks, maybe need more
process, need check GOP、 keyframes 、VFR mode, because they will get
different timestamps.
>
> The set can also be found on GitHub, where ignoring whitespaces makes specially the last patch a lot more readable:
> https://github.com/BtbN/FFmpeg/tree/enhanced-flv
>
>
> Dennis Sädtler via ffmpeg-devel (2):
>   avformat/flvenc: Implement support for multi-track video
>   avformat/flvdec: Add support for demuxing multi-track FLV
>
> Timo Rothenpieler (11):
>   avformat/flvenc: add enhanced audio codecs
>   avformat/flvenc: remove !size check for audio packets
>   avformat/flvdec: add enhanced audio codecs
>   avformat/flvenc: refactor fourcc writing
>   avformat/flvenc: write enhanced rtmp multichannel info for audio with
>     more than two channels
>   avformat/flvdec: parse enhanced rtmp multichannel info
>   avformat/flvenc: add support for writing multi track audio
>   avformat/flvdec: add support for reading multi track audio
>   avformat/rtmpproto: add more enhanced rtmp codecs
>   avformat/flvdec: stop shadowing local variables
>   avformat/flvdec: support all multi-track modes
>
>  libavformat/flv.h       |  21 ++
>  libavformat/flvdec.c    | 654 +++++++++++++++++++++++++++-------------
>  libavformat/flvenc.c    | 443 +++++++++++++++++++++------
>  libavformat/rtmpproto.c |  11 +-
>  4 files changed, 819 insertions(+), 310 deletions(-)
>
> --
> 2.43.2
>
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Thanks
Steven