[FFmpeg-devel] movenc.c extradata handling for "aivx" video streams

Vincent Olivier vincent at up4.com
Thu Mar 13 01:54:12 CET 2014

I will check and (only if it works) will submit a patch.


On Mar 12, 2014, at 8:22 PM, Michael Niedermayer <michaelni at gmx.at> wrote:

> On Wed, Mar 12, 2014 at 10:00:23AM -0400, Vincent Olivier wrote:
>> Hi,
>> MKTAG('a', 'i', 'v', 'x') was recently added to isom.c for FCPX-remuxed XAVC 4:2:2 10bit (originally MXF-wrapped). It is correctly linked to AV_CODEC_ID_H264. But it requires a “passthrough” handling of the extradata (because it actually is not AVCC, but Annex-B, as per probing extensively with ffprobe). What would be the best way to patch this: to provide an AVOption to force extradata passthrough for the MOV muxer in “movenc.c” or to write the provided extra data as-is when the codec tag is set to “aivx”? Or is there even a way to do so programmatically without patching?
> checking for the aivx tag seems the most user friendly
> assuming this would end up making things just work out of the box
> [...]
> -- 
> Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
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