[FFmpeg-trac] #4054(avformat:new): libavformat: subtitles: provide a mechanism to guess subtitle character encoding

[FFmpeg]

#4054: libavformat: subtitles: provide a mechanism to guess subtitle character
encoding
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             Reporter:  11rcombs     |                    Owner:
                 Type:  enhancement  |                   Status:  new
             Priority:  wish         |                Component:  avformat
              Version:  git-master   |               Resolution:
             Keywords:  subtitles    |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Changes (by gjdfgh):

 * cc: nfxjfg@… (added)


Comment:

 Some things to note:

 - no subtitle charset detector is good/sufficient, and you will always
 have the situation in which you have multiple guesses, and you want the
 user to select which guess, etc.
 - I think it's wrong to add detection directly to (or below) the subtitle
 demuxers - instead, maybe there should be a function to guess subtitle
 codec from a list of packets (you could provide a convenience function
 which does that using the libavformat internal packet queue)
 - the actual subtitle conversion should be somewhere else too, and maybe
 work on the packets (or you could set it as sub charset option in
 libavcodec, forgot the option name)


 Also, this should probably be discussed on the mailing list. The bug
 tracker sucks for this purpose.

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Ticket URL: <https://trac.ffmpeg.org/ticket/4054#comment:1>
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