[FFmpeg-devel] [PATCH] Add alphaextract, alphamerge filters

Nicolas George nicolas.george at normalesup.org
Tue Jul 17 14:02:27 CEST 2012

> From b2ebe95c7890c8ba65606d92236f22d8044dc00b Mon Sep 17 00:00:00 2001
> From: Steven Robertson <steven at strobe.cc>
> Date: Tue, 10 Jul 2012 22:14:57 -0700
> Subject: [PATCH] Add alphaextract, alphamerge filters.
> These filters are designed for storing and transmitting video sequences
> with alpha using higher-efficiency codecs such as x264 which don't
> natively support an alpha channel. 'alphaextract' takes an input stream
> with an alpha channel and returns a video containing just the alpha
> component as a grayscale value; 'alphamerge' takes an RGB or YUV stream
> and adds an alpha channel recovered from a second grayscale stream.

It looks ok. I am no specialist of the FATE part, though.

Is there anyone else that want to comment?

Thanks for your work.


  Nicolas George
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