[FFmpeg-devel] Query regarding codec parsers

[Gautam Ramakrishnan]

On Sun, Mar 29, 2020 at 8:34 PM Carl Eugen Hoyos <ceffmpeg at gmail.com> wrote:
>
> Am So., 29. März 2020 um 16:45 Uhr schrieb Gautam Ramakrishnan
> <gautamramk at gmail.com>:
>
> > > > What exactly does a parser do and how is it different from a decoder?
> > > > I am unable to understand the exact use case of a parser.
> > >
> > > Try the following:
> > > $ cat 1.jpg 2.jpg | ffmpeg -i -f null -
> > > (Is expected to decode two frames as can be seen in the console output,
> > > also works for example with png)
> > >
> > > $ cat 1.j2k 2.j2k | ffmpeg -i - -f null -
> > > Will only decode one frame because there is no parser to split the
> > > input.
> > >
> > So does it basically try to find the SOC marker and EOC markers and
> > split the streams into frames?
>
> Basically, yes.
> Look at existing parsers in libavcodec/*parser* (or git grep AVCodecParser),
> especially the jpeg parser.
>
> Carl Eugen
> _______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel at ffmpeg.org
> https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
>
> To unsubscribe, visit link above, or email
> ffmpeg-devel-request at ffmpeg.org with subject "unsubscribe".

Hi,,

Would working on a parser be a good idea now?

-- 
-------------
Gautam |