#9491: ass/subtitle filter incorectly handles colorspaces
-------------------------------------+-------------------------------------
Reporter: | Type: defect
alwinramirus |
Status: new | Priority: normal
Component: avfilter | Version: git-
| master
Keywords: ass | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Summary of the bug:
I am trying to burn in ass subtitles on to a video. The resulting video
differs in color to what media players and subtitle editors display.
The video is in BT.709 limited and the ass subtitles file contains the
header line YCbCr Matrix: TV.709.
What I assume happens:
The ass videofilter incorrectly converts the RGB values to BT.601 instead
of BT.709 resulting in shifted colors.
How to reproduce:
{{{
% ffmpeg -i video.mp4 -vf ass=subtitles.ass out.mp4
ffmpeg version N-104454-gd92fdc7144-20211031 Copyright (c) 2000-2021 the
FFmpeg developers
}}}
I have attached the files used for testing.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/9491>
FFmpeg <https://ffmpeg.org>
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