Files
ffmpeg/libavfilter
Gyan Doshi 1c76134fe3 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.
2017-12-14 13:44:45 -09:00
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