[FFmpeg-devel] [PATCH] avformat: Support merging side data before the muxer

[wm4]

On Sun, 21 Sep 2014 21:37:14 +0200
Michael Niedermayer <michaelni at gmx.at> wrote:

> On Sun, Sep 21, 2014 at 09:23:18PM +0200, Nicolas George wrote:
> > Le jour de la Récompense, an CCXXII, Michael Niedermayer a écrit :
> > > This allows applications which interface through AVIOContext or URLProtocol
> > > to access side data.
> > > 
> > > Based-on patch by: Thomas Volkert <silvo at gmx.net>
> > > Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> > 
> > Can you point to the discussion about this patch and/or explain the actual
> > use case?
> 
> user applications and libs which interface to FFmpeg or libavformat
> through a URLProtocol or AVIOContext receive the AVPacket.data but
> not AVPacket.side_data but the side data is often essential
> 
> With this patch, such applications can set the flag and would
> receive the complete data stream. The alternative would be for such
> libs to be redesigned to interface to FFmpeg or libavformat
> differently
> 
> 
> [...]
> 

So it's some kind of in-application serialization? I still don't
follow. Why? Over what format? Shouldn't nut be able to handle all
these potentially ffmpeg-specific things?