[FFmpeg-devel] [RFC PATCH 3/3] HACK: avformat: rawenc: allow to output a raw PRFT

[Clément Péron]

Hi Andreas,

On Fri, 22 Sept 2023 at 09:58, Andreas Rheinhardt
<andreas.rheinhardt at outlook.com> wrote:
>
> Clément Péron:
> > Hi Michael, Andreas,
> >
> > On Thu, 21 Sept 2023 at 22:50, Andreas Rheinhardt
> > <andreas.rheinhardt at outlook.com> wrote:
> >>
> >> Michael Niedermayer:
> >>> On Thu, Sep 21, 2023 at 02:17:00PM +0200, Clément Péron wrote:
> >>>> Output the producer reference time to a dirty raw output.
> >>>>
> >>>> Signed-off-by: Clément Péron <peron.clem at gmail.com>
> >>>> ---
> >>>>  libavformat/rawenc.c | 122 +++++++++++++++++++++++++++++++++++++++++++
> >>>>  1 file changed, 122 insertions(+)
> >>>
> >>> this breaks fate-filter-volume and others
> >>> (Segmentation fault)
> >>>
> >>> I can rerun it with debug symbols and provide peoper gdb output
> >>> but i suspect given this has "HACK" in the title you are aware of this
> >
> > The "HACK" tag meaning was not supposed to be: "it's ok if it
> > segfaults", but more to trigger a discussion is it possible to
> > properly support an output timestamp in the raw video demux, and if
> > yes how to do it :)
>
> If you need a timestamp for raw video, then use a proper container and
> not raw video. In fact, this patch basically creates new formats
> different from all the raw formats.

Yes I agree, but I do not want to add too much overhead nor
computation processing or memory copy to my pipeline just to mux and
demux between ffmpeg and my python script.

The idea is to have a very light structure to easily pipe it.

I'm not familiar with audio/video container but it seems to me that
parsing containers are not very light no?

Thanks,
Clement


>
> - Andreas
>
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