[FFmpeg-devel] Prores 4444 (alpha) support

Al Crate al at dneg.com
Tue Oct 23 10:38:17 CEST 2012

Yeah that'd be handy, though getting the color model added to avutil 
would need to happen first, though just to confuse matters i think 4444 
can use RGB as well as YUV

On 22/10/12 18:36, Maxim wrote:
> Am 22.10.2012 18:20, schrieb Edward Richards:
>> I don't think anyone knows what the alpha compression scheme is.
> The compression scheme for ProRes' alpha is basically the same as for
> the other three components, i.e. run-length coding + variable-length
> codewords. I'm currently preparing a description on how it works, so
> someone else could reimplement it...
>> Also it is a patent violation in the US and possibly other places so use accordingly.
> Fortunately, software patents are void in Europe:-)
> Best regards
> Maxim Poliakovski
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