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

[Hendrik Leppkes]

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?
We generally require a proper specification to ensure we mux files that work.

- Hendrik