#11461: Corruption of 608 captions data on extraction
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Reporter: Zach | Type: defect
Status: new | Priority: critical
Component: ffmpeg | Version: git-master
Keywords: Captions | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Summary of the bug:
How to reproduce:
{{{
Extract:
ffmpeg.exe -f lavfi -i "movie=Ep.12_Origional_CaptionMaker.mp4"[out+subcc]
-map 0:1 -c:s copy Ep.12_ffmpeg.scc
Import captions into Premiere or view data with notepad++ and compare to
Ep.12_CaptionMaker.scc
ffmpeg-2025-02-06-git-6da82b4485-full_build
built on 2025-02-06
}}}
FFmpeg outputs an scc file with different formatting than what Premiere or
CaptionMaker produce. The resulting file shows corrupted data when
imported into premiere even though
https://drive.google.com/drive/folders/13lBxT4alNCJm60mXO5AKuTvCRxDWkyOe?usp=sharing
Here are the first 10 lines of the scc from Caption Maker which are
similar in format to what Premiere outputs.
{{{
Scenarist_SCC V1.0
00:00:01:14 9420 9470 9723 d3ef 20c2 ec75 e520 cdef 756e f461 e96e
2054 e5ec e576 e973 e9ef 6e80 942c 8080 8080 942f
00:00:02:11 9420 9452 9723 e973 20ec efe3 61f4 e564 20e9 6e20 5761
ecec 6180 94f2 9723 5761 ecec 612c 2057 6173 68e9 6e67 f4ef 6eae 942c 8080
8080 942f
00:00:06:00 9420 9470 97a1 57e5 a7f2 e520 68e5 6164 942c e564 20f4
ef20 64ef 2073 ef6d e520 e6e9 ec6d e96e 6780 942c 8080 8080 942f
00:00:08:02 9420 94f2 97a2 e6ef f220 6120 68ef 6de5 f4ef f76e 2073
68ef f7ae 942c 8080 8080 942f
}}}
FFMPEG outputs almost every frame with only one 4 digit chunk per frame.
{{{
Scenarist_SCC V1.0
00:00:01:16 9420
00:00:01:17 94ae
00:00:01:18 9470
00:00:01:19 9723
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/11461>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
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