#9167: Color changed when an image converting to video
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Reporter: kvsico | Owner: (none)
Type: defect | Status: reopened
Priority: normal | Component:
| undetermined
Version: unspecified | Resolution:
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Changes (by mirh):
* cc: mirh (added)
* status: closed => reopened
* resolution: invalid =>
Comment:
What's this hardon for seeing ffplay issues everywhere?
Yes there's possibly some issue with rounding in conversions (plenty of
issues open for that already), and the simple portable media player that
the project ships sucks a little, but that wasn't OP's main baffling
problem.
As said in comment:5, non-color-managed PNGs assume a BT.601 color matrix.
Ffmpeg is more or less rightly "transparent" to the matter, and will just
happily re-use it.
Problem is that whenever video players see something "untagged", if the
image resolution is higher than ~PAL/NTSC dimensions they will infer
that's some kind of BT.709 authored content and will use those curves.
Arguably ffmpeg should add the color space metadata it assumes to be using
to all its encoded media.
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Ticket URL: <https://trac.ffmpeg.org/ticket/9167#comment:31>
FFmpeg <https://ffmpeg.org>
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