[FFmpeg-trac] #549(avfilter:closed): Video filter overlay does not preserve alpha
FFmpeg
trac at avcodec.org
Tue Nov 27 10:50:07 CET 2012
#549: Video filter overlay does not preserve alpha
-------------------------------------+-------------------------------------
Reporter: ehsmeng | Owner:
Type: defect | Status: closed
Priority: normal | Component: avfilter
Version: git-master | Resolution: fixed
Keywords: overlay | Blocked By:
alpha png | Reproduced by developer: 1
Blocking: |
Analyzed by developer: 1 |
-------------------------------------+-------------------------------------
Changes (by saste):
* status: open => closed
* resolution: => fixed
Comment:
Should be fixed in:
{{{
commit 13c62525362595cc914161aaa192953dd9077233
Author: Mark Himsley <mark at mdsh.com>
Date: Sun Nov 25 15:24:29 2012 +0000
lavfi/overlay: enable yuva420p as overlay background
Same calculation as for RGBA etc to create unpremultiplied output.
Useful for creating an intermediate "Mix/Effects bank", in vision
mixer
(switcher) terminology.
Example command:
ffmpeg -i input.mov -vf
"[in]scale=iw:ih:interl=1,format=yuv420p[bg];movie=BBC_blocks_watermark.png,scale=iw:ih:interl=1,format=yuva420p[dog];movie=Kickabout_strap.mov,sc
-b:v 3M -an output.mov
Fix trac ticket #549.
Signed-off-by: Stefano Sabatini <stefasab at gmail.com>
}}}
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/549#comment:2>
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