[FFmpeg-devel] [PATCH 1/3] avformat/dvdvideodec: add CLUT utilities and subtitle palette support

[Anton Khirnov]

Quoting Marth64 (2024-03-06 16:36:32)
> Good morning,
> 
> DVD subtitle palettes, which are natively YUV, are currently carried as
> a hex string in their respective subtitle streams and have
> no concept of colorspace tagging (even predating dvd demuxer). The
> convention is to convert
> them to RGB prior to storage. Common players will only render
> the palettes properly if they are stored as RGB. Even ffmpeg itself
> expects this, and already does -in libavformat- the YUV-RGB conversions,
> specifically in mov.c and movenc.c.
> 
> The point of this patch is to provide a consolidation of the code
> that deals with creating the extradata as well as the RGB conversion.
> That can then (1) enable usable palette support for DVD demuxer if it is
> merged
> and (2) start the process of consolidating the related conversions in
> MOV muxer/demuxer and eventually find a way to properly tag
> the colorspace.

Is there any reason ever to export YUV palette? Should this even be an
option?

-- 
Anton Khirnov