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authorGyan Doshi <gyandoshi@gmail.com>2017-12-11 22:35:18 +0530
committerLou Logan <lou@lrcd.com>2017-12-14 13:44:45 -0900
commit1c76134fe37ac20695627e3f5ce1f2bbf1245fcc (patch)
tree3db7109fea202a62e3d53231db89ce904070af86 /libavdevice/alsa.h
parent980af9a88cfd743d71fad67e7dd905231ea0a4f7 (diff)
downloadffmpeg-1c76134fe37ac20695627e3f5ce1f2bbf1245fcc.tar.gz
avfilter/drawbox+drawgrid - add option to prevent overwriting of source pixels
If the user-supplied color in drawbox and drawgrid filters is non-opaque, the box & grid painting overwrites the input's pixels (including alpha). Users typically expect the alpha of the specified color to only act as a key for compositing on top of the main input. Added option allows users to select between replacement and composition. Tested and documented.
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