#10041: Problem with exposure filter
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Reporter: Michael Koch | Owner: (none)
Type: defect | Status: closed
Priority: normal | Component: avfilter
Version: git-master | Resolution: invalid
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Comment (by Michael Koch):
Replying to [comment:6 Elon Musk]:
> The invert of pixels bug have been fixed.
The subtraction of s->black (now in line 70) doesn't make any sense in my
opinion.
And it would be better if the unit of "exposure" is photographic EV
values, I mean exposure=1 should be a factor of 2 and exposure=-1 should
be a factor of 0.5.
I suggest to replace lines 70-73 by
s->scale = exp(s->exposure * log(2.0))
It's always positive.
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Ticket URL: <https://trac.ffmpeg.org/ticket/10041#comment:7>
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