[FFmpeg-devel] [PATCH 1/2] Add experimental muxing support for FLAC in ISO BMFF (MP4).

Matthew Gregan kinetik at flim.org
Tue Nov 22 05:02:49 EET 2016

At 2016-11-21T15:56:23-0300, James Almer wrote:
> Seeing the maintainer hasn't replied, i have pushed it. Seems to adhere to
> the (draft) spec correctly, and is under an experimental strict check.

Thanks for your assistance getting this reviewed and landed, much

> I tried creating some FLAC only files and they play fine on Firefox 51 b1,
> which is the first version with FLAC support. However an h264+flac file
> gave me audio only and no video. Do you know if it's a bug that should be
> reported to Mozilla, or just expected behavior as they only mention support
> for h264+aac and no other specific AV combination?

That's a bug caused by missing functionality in the new Rust demuxer (which
is only used for VP9, FLAC, and Opus in MP4 for now, but the presence of any
of those track types triggers the new demuxer for the entire stream).  It'll
be fixed by https://bugzilla.mozilla.org/show_bug.cgi?id=1317609.

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