[FFmpeg-user] The internal ffmpeg rgb=>yuv pipeline and conversion matrices

Peter Rabbitson rabbit+list at rabbit.us
Mon May 9 15:38:28 CEST 2016

On 05/09/2016 02:10 PM, Andy Furniss wrote:
> yuv444p is not very compatible it may just fail or the player may need
> to convert to 420 anyway.
> In the words of Poynton (IIRC) the only reason to convert rgb to yuv is
> to enable sub-sampling (though I guess it may be better supported than
> if you actually encoded as rgb  with libx264rgb)

In theory I can see that. In practice - neither vimeo nor youtube 
understand libx264rgb at upload time, left alone being able to deliver 
it to the end user.

OTOH while 444p is not widely supported, it is part of the standard for 
11 years... Not sure if that means much in practice though.

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