[FFmpeg-devel] [PATCH v3 1/3] avcodec/pngenc: avoid writing cICP when inappropriate

[Leo Izen]

On 2/2/23 10:09, Leo Izen wrote:
> We parse the fallback cHRM on decode and correctly determine that we
> have BT.709 primaries, but unknown TRC. This causes us to write cICP
> where we shouldn't. Primaries without transfer can be handled entirely
> by cHRM, so we should only write cICP if we actually know the transfer
> function.
> 
> Additionally, we should avoid writing cICP if there's an ICC profile
> because the spec says decoders must prioritize cICP over the ICC
> profile.
> 

Andreas has an issue with one of the other patches, but as this first 
one is just a fix I'll apply it soon if there's no objections.

- Leo Izen (thebombzen)