[FFmpeg-devel] [PATCH v3] flac: add GIF image support

[leo60228]

That's true, but as far as I can tell FFmpeg assumes that all paletted
images have 256 colors, and thus there isn't a way to get the exact number
of colors in a GIF.
I also doubt that this will cause problems in practice, it's somewhat
strange that this field is even there.
If I'm wrong on any of this, please let me know.

On Sun, Jan 31, 2021 at 3:07 PM Derek Buitenhuis <derek.buitenhuis at gmail.com>
wrote:

> On 29/01/2021 16:12, leo60228 wrote:
> > +    if (st->codecpar->format == AV_PIX_FMT_PAL8)
> > +        avio_wb32(pb, AVPALETTE_COUNT);
> > +    else
> > +        avio_wb32(pb, 0);
>
> Is this correct, though?
>
> GIFs encoded by things that are not libavcodec may have less than
> AVPALETTE_COUNT entries/colors.
>
>
> - Derek
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