[FFmpeg-trac] #11459(undetermined:new): Corruption of 608 captions data on transcode

[FFmpeg]

#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>
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