[FFmpeg-devel] Prores 4444 (alpha) support

Al Crate al at dneg.com
Mon Nov 5 14:54:55 CET 2012

On 04/11/12 16:40, Carl Eugen Hoyos wrote:
> Al Crate <al <at> dneg.com> writes:
>> Yeah that'd be handy, though getting the color
>> model added to avutil would need to happen first,
> This works now with current git head, you
> can use the libopenjpeg decoder and encoder
> to test.
>> though just to confuse matters i think 4444
>> can use RGB as well as YUV
> Do you have such a sample?
> Carl Eugen
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Cool, that'll be handy, though there doesn't appear to be much 
information about the alpha channel compression scheme out there.

It's lossless and up to 16bit, I'm guessing it's probably independent of 
the other channels bit depth.

Nope no samples to hand, I'm just going on what the white papers says.

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