[FFmpeg-trac] #6021(avcodec:new): tx3g / mov_text subtitles are not encoded correctly in some specific cases

[FFmpeg]

#6021: tx3g / mov_text subtitles are not encoded correctly in some specific cases
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             Reporter:  erikbs         |                    Owner:
                 Type:  defect         |                   Status:  new
             Priority:  normal         |                Component:  avcodec
              Version:  git-master     |               Resolution:
             Keywords:  utf8 mov_text  |               Blocked By:
             Blocking:                 |  Reproduced by developer:  0
Analyzed by developer:  0              |
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Comment (by CoRoNe):

 I only saw your posts just now, because I didn't get email-notification.
 [[BR]]
 > ''It is also possible that the patch was not applied correctly (the one
 I posted above is in a format that is slightly different from the one in
 which files are supposed to be submitted to Patchwork).''
 Last time I didn't actually apply your patch the official way. I just
 manually edited movtextenc.c. I've also done this now, because of line-
 numbers in your patch not being up-to-date anymore.
 [[BR]]
 > ''Feel free to upload a sample video that is affected by the problem.''
 See http://rwijnsma.home.xs4all.nl/files/test/
 [[BR]]
 > ''Thus other relevant questions are: ...''
 Everything is just plain text. The subtitles vanish randomly.

 I've successfully compiled FFMpeg with your changes, but after creating
 another test-video (//'VPWON_1269922(FFMpeg-mux_t32)patch.mp4'//) my TV
 didn't display subtitles at all anymore.
 No problem with MPC-HC on my pc.

 commandline used:
 {{{
 ffmpeg.exe -i "full-episode" -i "VPWON_1269922.srt" -t 32 -c copy -c:s
 mov_text
 -metadata:s:s language=dut "VPWON_1269922(FFMpeg-mux_t32)patch.mp4"
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/6021#comment:13>
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