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

Bob Kirnum bkirnum at gmail.com
Wed May 17 15:34:34 EEST 2017

Sorry, I am just coming up to speed with this.  I am not the originator of
this implementation, I cleaned it up and now handling this submission

I am told we tested with VLC and QT.  However, QT only supports AMR-NB.
WMP does not support AMR at all.

On Wed, May 17, 2017 at 8:27 AM, 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?
> We generally require a proper specification to ensure we mux files that
> work.
> - Hendrik
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