[FFmpeg-devel] [PATCH] lavf: add textdata virtual demuxer and demuxer

[Stefano Sabatini]

On date Tuesday 2016-08-23 16:53:28 +0200, Nicolas George encoded:
> Le septidi 7 fructidor, an CCXXIV, Stefano Sabatini a écrit :
> > Bump.
> > 
> > So, basically, what are the features that you want to add?
> > I can list a few:
> > 
> > - have multiple streams (with media type and optionally encoding,
> >   assumes base64 by default) in a dedicated header
> > 
> > - specify codec parameters: this could be done serializing
> >   AVCodecParameters. This is the part which would be less robust.
> > 
> > The important point to keep in mind is that this is meant to be an
> > internal format, so it should be used internally (e.g. to mux data)
> > coming from an external source, and we give no guarantee that the
> > format will be robust to changes in libavformat/libavcodec (e.g. in
> > case AVCodecParameter is extended).
> > 
> > My main objection to the ffprobe format is that it's not easily
> > parseable, but I can reconsider it in case there is a strong request
> > for that.
> 

> Sorry for the delay. Here is the patch; as you can see it is two and a half
> years old. IIRC, it used to work with the output of "ffprobe -show_format
> -show_streams -show_packets -show_data", provided the output was edited to
> put the sections in the required order.
> 

> The benefit from using ffprobe instead of a custom format is to not have yet
> another variant of text format.

Sure.

I rebased the patch, and performed two simple changes in ffprobe (see
attachment), and it's almost working.

I think supporting the show_compact_data mode should simplify the
format in case the format is generated programmatically/through
scripting.
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