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

Michael Niedermayer michaelni at gmx.at
Tue Jul 17 17:27:56 CEST 2012

On Tue, Jul 17, 2012 at 02:02:27PM +0200, Nicolas George wrote:
> > 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?

not me, iam fine with the code if you are fine with it


Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

I have never wished to cater to the crowd; for what I know they do not
approve, and what they approve I do not know. -- Epicurus
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