#11459: Corruption of 608 captions data on transcode
-------------------------------------+-------------------------------------
Reporter: Zach | Type: defect
Status: new | Priority: critical
Component: | Version: git-
undetermined | master
Keywords: CLosed- | Blocked By:
caption |
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Summary of the bug:
How to reproduce:
{{{
% ffmpeg.exe -y -i AIM-2301.mp4 -pix_fmt yuv420p -c:v libx264 -flags
+ilme+ildct -x264opts tff=1 -vf fps=29.97,scale=1920x1080 -b:v 25000k
-codec:a aac -ar 48000 -threads 0 AIM-2301_x264_24tohd.mp4
ffmpeg-2025-02-06-git-6da82b4485-full_build
built on 2025-02-06
}}}
This transcode command produces a file with corrupted captions text. The
source file is a 23.976fps progressive and target format is 1080i5994. I
also see problems with other conversions such as progressive to interlaced
at the same frame rate or 30 to 29.97 conversions but the errors are less
pronounced and occur less often. Passing captions is a legal requirement
for many that use ffmpeg.
https://drive.google.com/file/d/1U3DYkvmIbFECjdihFbDIcnRVgQxs1tbM/view?usp=drive_link
--
Ticket URL: <https://trac.ffmpeg.org/ticket/11459>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
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