[FFmpeg-trac] #5678(avformat:new): DVD Subtitles broken in 3.1

[FFmpeg]

#5678: DVD Subtitles broken in 3.1
-------------------------------------+-------------------------------------
             Reporter:  FernetMenta  |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  important    |                Component:  avformat
              Version:  unspecified  |               Resolution:
             Keywords:  dvdsub       |               Blocked By:
  regression                         |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by fritsch):

 I have 6 steps to go - will report back when finished. Current log:

 git bisect start
 # good: [0c9490609d888ba384798777a3daaf012488ad89] avformat: support
 shorten in nistshpere demuxer
 git bisect good 0c9490609d888ba384798777a3daaf012488ad89
 # bad: [8a3221cc67a516dfc1700bdae3566ec52c7ee823] avformat/mov: Check
 sample size
 git bisect bad 8a3221cc67a516dfc1700bdae3566ec52c7ee823
 # bad: [7155bd1c94c285ac53e675c7f66acc28d7fa2a71] avcodec/m101: Ask for
 samples with too small extradata_size
 git bisect bad 7155bd1c94c285ac53e675c7f66acc28d7fa2a71
 # bad: [ee38234c43b6b3280304be7a43dc569cef683c43] Merge commit
 'e481458bc308ee838deaeacac51929514762e7a7'
 git bisect bad ee38234c43b6b3280304be7a43dc569cef683c43
 # bad: [0520d573db71171053a684b1b2fed0598df1641f] Merge commit
 '9765549f551ff40869aee1a6492b6a976c86cfe9'
 git bisect bad 0520d573db71171053a684b1b2fed0598df1641f
 # bad: [197fa698c6cf77b31f3e29a2f685aa52e7404b8b] Merge commit
 '97aec6e75ef36ed0402653519daa8e1fc8ddb555'
 git bisect bad 197fa698c6cf77b31f3e29a2f685aa52e7404b8b

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Ticket URL: <https://trac.ffmpeg.org/ticket/5678#comment:6>
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