[FFmpeg-devel] [PATCH v2] lavf/mov: Audio and AV_CODEC_ID_NONE

Ganesh Ajjanagadde gajjanag at mit.edu
Tue Jan 5 07:05:45 CET 2016

On Mon, Jan 4, 2016 at 9:45 PM, Mats Peterson
<matsp888-at-yahoo.com at ffmpeg.org> wrote:
> Simplified the patch somewhat. Description follows:
> In many older QuickTime files, the audio format, or "fourcc", is
> 0x00000000 (AV_CODEC_ID_NONE). The QuickTime File Format Specification
> states the following regarding this situation:
> "This format descriptor should not be used, but may be found in some
> files. Samples are assumed to be stored in either 'raw ' or 'twos'
> format, depending on the sample size field in the sound description."
> MPlayer handles this logic by itself, but FFmpeg/FFplay currently does
> not.
> Mats
> --
> Mats Peterson
> http://matsp888.no-ip.org/~mats/
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One tip for you that is very helpful for reviewers: suffix [PATCH] by
a version, like [PATCHv2], [PATCHv3], etc. It helps them in keeping
track of the proposal. Thanks.

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