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

[Stefano Sabatini]

On date Thursday 2016-05-19 18:50:17 +0200, Stefano Sabatini encoded:
> On date Thursday 2016-05-19 18:45:22 +0200, Stefano Sabatini encoded:
> > This format is useful to inject custom user data into streams.
> > ---
> >  doc/demuxers.texi           |  40 +++++++++
> >  doc/muxers.texi             |  31 +++++++
> >  libavformat/Makefile        |   2 +
> >  libavformat/allformats.c    |   1 +
> >  libavformat/fftextdatadec.c | 212 ++++++++++++++++++++++++++++++++++++++++++++
> >  libavformat/fftextdataenc.c | 103 +++++++++++++++++++++
> >  6 files changed, 389 insertions(+)
> >  create mode 100644 libavformat/fftextdatadec.c
> >  create mode 100644 libavformat/fftextdataenc.c
> 
> Short explanation: I needed some way to inject serialized data packets
> through stream-copy, so I implemented this format. The other patches
> are related (since I needed to inject timed ID3 data).
> 
> I'm fine with extending it with other options, or to use an
> alternative solution (if exists).

Please tell if you consider this format acceptable.

One obvious limitation is that it can't store codec properties (nor
the codec name, nor more than one stream). One possibility would be to
dump the serialization of AVCodecContext/AVCodecParameters, even if
these would require a serious limitation on the format (since that
means it would require to use it only as intermediary format, for
muxing and demuxing using the same version of FFmpeg, which is fine in
my use case).
-- 
FFmpeg = Fabulous and Furious Multimedia Philosofic Excellent Gadget