[FFmpeg-devel] [PATCH] Add alphaextract, alphamerge filters
steven at strobe.cc
Wed Jul 11 07:41:06 CEST 2012
I need to transmit a bunch of frames with a real-valued alpha channel
(not just a static mask) over a relatively slow link, and since the
recipient is on Windows, I'd like the relative simplicity of having
FFmpeg be the only tool that he needs to recover the content. A bit of
searching seems to indicate I'm not the first to want this, so I wrote
up a simple pair of filters to make this possible. From the patch
"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."
Happy to address any review comments.
-------------- next part --------------
A non-text attachment was scrubbed...
Size: 17362 bytes
Desc: not available
More information about the ffmpeg-devel