[FFmpeg-devel] [PATCH] avfilter: Enable in MP4 container both AMR-NB and AMR-WB

[Carl Eugen Hoyos]

2017-05-17 14:27 GMT+02:00 Hendrik Leppkes <h.leppkes at gmail.com>:
> On Wed, May 17, 2017 at 2:05 PM, Bob Kirnum <bkirnum at gmail.com> wrote:
>> Backwards compatibility tested running complete FATE testing.
>>
>> Our media server can record to and play from MP4 containing H.264 and / or
>> AMR-NB / WB.  The codecs are proprietary implementations.  We use
>> libavformat for MP4 containers.  The recorded containers can be played back
>> using third party tools (open source implementations).
>>
>
> So are you saying that there is no official specification for AMR in
> MP4, and these files are only compatible with your proprietary
> software?

It says here (afaict) that such a specification exists:
http://www.mp4ra.org/codecs.html

I thought that demuxing should already be supported and
that muxing may need specific atoms.

Carl Eugen