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

[FFmpeg]

#5678: DVD Subtitles broken in 3.1
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             Reporter:  FernetMenta  |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:  avformat     |                  Version:
             Keywords:  DVD          |  unspecified
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
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 We were trying to upgrade ffmpeg to 3.1 for new release of Kodi but DVD
 menus stopped working. Subtitle streams (at least those for menus) are not
 recognised as valid subtitle streams anymore. Instead AvFormatContext has
 invalid streams. As a result menu selectors are not visible.

 Version 3.0 does work.

 Should be reproducible with most DVDs. If you need a downsized sample, let
 me know.

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