[FFmpeg-trac] #9158(avformat:new): DVD language metadata

[FFmpeg]

#9158: DVD language metadata
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             Reporter:  sceedy       |                    Owner:
                 Type:  enhancement  |                   Status:  new
             Priority:  wish         |                Component:  avformat
              Version:  git-master   |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Changes (by Cigaes):

 * version:  unspecified => git-master
 * component:  undetermined => avformat


Comment:

 The language metadata is not present in the VOB files, it is therefore
 impossible to extract it. As you can see in your code, it comes from the
 IFO file.

 It could be possible to have an option to the MPEG2-PS demuxer to let it
 read the IFO file. I have other priorities right now, but it should not
 take that much effort for somebody else motivated. I can give advice.

 Your code cannot be used as it is because it breaks too many style and
 structure requirements for FFmpeg, but the `ParseIFO()` function can serve
 as base for the option I was speaking of. Can you be a little more precise
 in your statement about its license: it looks like you are giving it away
 to the Public Domain, or as close as can be under your legislation, but we
 need you to say it more clearly to be able to use the code.

 Note: better not use a Zip file for two small text files; without the Zip
 file, Trac would be able to let us browse them online.

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Ticket URL: <https://trac.ffmpeg.org/ticket/9158#comment:1>
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