#11455: Degradation in Closed Captions decoding
-------------------------------------+-------------------------------------
Reporter: ValeryKot | Type: defect
Status: new | Priority: normal
Component: | Version: git-
undetermined | master
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Summary of the bug: in some cases, FFmpeg fails to extract Closed Captions
(A/53 Part 4 format). This is a degradation: same file can be processed
correctly with FFmpeg 4.0, but also with VLC.
How to reproduce:
{{{
% ffmpeg.EXE" -f lavfi -report -i "movie=CC720p60_10sec.mp4[out+subcc]"
-map 0:1 output_10sec.srt
ffmpeg version N-118422-g1fbe9deee3-20250204
built on 2025-02-04 17:56
}}}
Relevant error is:
{{{
[Closed Captions Decoder @ 000002f8b063dec0] Data ignored due to columns
exceeding screen width.
}}}
I will (try to) attach original file, and reports and output by latest
master and by 4.0
--
Ticket URL: <https://trac.ffmpeg.org/ticket/11455>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
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