On 17.04.24 19:30, James Zern via ffmpeg-devel wrote:
On Thu, Mar 28, 2024 at 7:10 AM Thilo Borgmann via ffmpeg-devel
<ffmpeg-devel@ffmpeg.org> wrote:
From: Josef Zlomek <jo...@pex.com>
Fixes: 4907
Adds support for decoding of animated WebP.
The WebP decoder adds the animation related features according to the specs:
https://developers.google.com/speed/webp/docs/riff_container#animation
The frames of the animation may be smaller than the image canvas.
Therefore, the frame is decoded to a temporary frame,
then it is blended into the canvas, the canvas is copied to the output frame,
and finally the frame is disposed from the canvas.
The output to AV_PIX_FMT_YUVA420P/AV_PIX_FMT_YUV420P is still supported.
The background color is specified only as BGRA in the WebP file
so it is converted to YUVA if YUV formats are output.
Signed-off-by: Josef Zlomek <jo...@pex.com>
---
Changelog | 1 +
libavcodec/codec_desc.c | 3 +-
libavcodec/version.h | 2 +-
libavcodec/webp.c | 710 ++++++++++++++++++++++++++++++++++++----
4 files changed, 653 insertions(+), 63 deletions(-)
I'm late trying to test these. I think these need to be rebased.
version.h is easy enough to skip. I didn't look at the conflict in
webp.c.
error: patch failed: libavcodec/version.h:30
error: libavcodec/version.h: patch does not apply
error: patch failed: libavcodec/webp.c:35
error: libavcodec/webp.c: patch does not apply
Patch failed at 0004 libavcodec/webp: add support for animated WebP
just posted v12 which applies to master again, also tagged it WIP.
Thanks for having a look,
Thilo
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