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1 Commits (697edcc12a0ab645f66378cee9549b80a40fe59c)
Author | SHA1 | Message | Date |
---|---|---|---|
Steven Robertson | 82ecae8a70 |
lavfi: add alphaextract and 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. Signed-off-by: Steven Robertson <steven@strobe.cc> Signed-off-by: Stefano Sabatini <stefasab@gmail.com> |
13 years ago |