[FFmpeg-devel] [PATCH] Add alphaextract, alphamerge filters
stefasab at gmail.com
Fri Jul 20 11:29:18 CEST 2012
On date Thursday 2012-07-19 21:43:31 -0700, Steven Robertson encoded:
> On Thu, Jul 19, 2012 at 12:56 AM, Stefano Sabatini <stefasab at gmail.com> wrote:
> > Also why are you copying the entire line, rather than just the image
> > data?
> So that the filters will work with 16-bit data just by extending the
> pad configuration (which I may look into soon).
Can you elaborate on this (and provide an use case)?
> From af200d4fdfe2997600b6f3924500cdeb34ae6cd2 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.
> Signed-off-by: Steven Robertson <steven at strobe.cc>
> doc/filters.texi | 25 +++++
> libavfilter/Makefile | 2 +
> libavfilter/allfilters.c | 2 +
> libavfilter/vf_alphaextract.c | 117 ++++++++++++++++++++++
> libavfilter/vf_alphamerge.c | 208 +++++++++++++++++++++++++++++++++++++++
> tests/lavfi-regression.sh | 15 ++-
> tests/ref/lavfi/alphaextract_rgb | 1 +
> tests/ref/lavfi/alphaextract_yuv | 1 +
> tests/ref/lavfi/alphamerge_rgb | 1 +
> tests/ref/lavfi/alphamerge_yuv | 1 +
> 10 files changed, 370 insertions(+), 3 deletions(-)
> create mode 100644 libavfilter/vf_alphaextract.c
> create mode 100644 libavfilter/vf_alphamerge.c
> create mode 100644 tests/ref/lavfi/alphaextract_rgb
> create mode 100644 tests/ref/lavfi/alphaextract_yuv
> create mode 100644 tests/ref/lavfi/alphamerge_rgb
> create mode 100644 tests/ref/lavfi/alphamerge_yuv
Patch looks good.
FFmpeg = Funny & Free Mega Ponderous Ermetic Gladiator
More information about the ffmpeg-devel