#10542: format=gray adds blanks into grayscale
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Reporter: jason43243 | Type: defect
Status: new | Priority: important
Component: | Version:
undetermined | unspecified
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Summary of the bug:
There are gaps in the histogram and I assume the image will be slightly
brighter.
How to reproduce:
{{{
ffmpeg -i input.mp4 -filter_complex "split [s1][s2]; [s1]
format=gray,histogram [so1]; [s2] extractplanes=y,histogram [so2];
[so1][so2] vstack" histogram.mp4
}}}
The format=gray version is common in google searches and gives wrong
results.
extractplanes=y seems better anyway, but format=gray should work the same.
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Ticket URL: <https://trac.ffmpeg.org/ticket/10542>
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