#3302: Cannot draw opaque text on transparent frame
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Reporter: Krieger | Owner:
Type: defect | Status: open
Priority: normal | Component: avfilter
Version: git-master | Resolution:
Keywords: drawtext | Blocked By:
Blocking: | Reproduced by developer: 1
Analyzed by developer: 0 |
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Comment (by andrey.utkin):
Replying to [comment:5 andrey.utkin]:
> Thanks for this hardcore workaround, but it is not flawless because when
you overlay the resulting text over light color, you have "dirt" at the
edge of letters because of hinting. See
>
> {{{
> ffmpeg -f lavfi -i [email protected],format=yuva444p -vf
"drawtext=fontfile=/usr/share/fonts/corefonts/cour.ttf:x=100:y=100:fontsize=40:text=Hello:[email protected],colorchannelmixer=rr=0:rg=0:rb=0:ra=0:gr=0:gg=0:gb=0:ga=0:br=0:bg=0:bb=0:ba=0:ar=2.0:ag=2.0:ab=2.0:aa=0,drawtext=fontfile=/usr/share/fonts/corefonts/cour.ttf:text=Hello:fontcolor=yellow:fontsize=40:x=100:y=100"
-vframes 1 -f image2 /tmp/out.png
> }}}
{{{ ft_load_flags=monochrome+no_hinting+render }}} seems to fix this.
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Ticket URL: <https://trac.ffmpeg.org/ticket/3302#comment:6>
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