[FFmpeg-devel] Support for decoding animated WebP images

Bjorn Roche bjorn at giphy.com
Thu Oct 26 22:33:36 EEST 2017

On Thu, Oct 26, 2017 at 11:21 AM, Carl Eugen Hoyos <ceffmpeg at gmail.com>

> 2017-10-26 17:16 GMT+02:00 Bjorn Roche <bjorn at giphy.com>:
> > Hey there,
> >
> > Has anyone been working on this ticket: https://trac.ffmpeg.org/
> ticket/4907
> Given that the ticket has seen no activity for two years, this
> isn't very likely.
> To make sure, feel free to add yourself as owner.
> > "Support decoding animated WebP images"
> >
> > I'd be interested in working on it, especially if it's not an enormous
> > project. Any guidance or hints, however vague, would be helpful. e.g., is
> > this a problem with the codec or the muxer? Is something wrong with the
> > underlying library? Which files should I look at first? Any idea/guess
> > about what the problem might be?
> Our webp decoder does not understand the ANIM and ANMF chunks.

Thanks, that's very helpful. On quick inspection of the spec it looks
similar to some things in GIF that I'm intimately familiar with. I'll need
to read a bit more, before I commit, but I think I can tackle this.



Bjorn Roche

Sr. Video Pipeline Engineer

bjorn at giphy.com

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