[FFmpeg-trac] #2431(avcodec:new): Detect if subtitle streams do not contain valid utf-8 (was: ffmpeg subtitle encoding of special characters does not working correctly)

FFmpeg trac at avcodec.org
Fri Apr 5 08:53:14 CEST 2013

#2431: Detect if subtitle streams do not contain valid utf-8
             Reporter:  Nick         |                    Owner:
                 Type:  enhancement  |                   Status:  new
             Priority:  wish         |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  sub srt      |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
Changes (by cehoyos):

 * priority:  normal => wish
 * type:  defect => enhancement
 * component:  undetermined => avcodec


 I still see several problems with your approach, so while it is not sure
 to get accepted, I guess you could try implementing something:
 * Invalid utf-8 files are rare, so not all cases would be covered
 * FFmpeg can only scan the first bytes of the subtitle stream to guess the
 encoding, this works for the file you uploaded, but not in the general
 * What about utf-8 encoded subtitles that contain an error (ie a 0xC0 or
 0xC1), they would suddenly be broken and users would report a regression.

 Since you know the encoding of your subtitle file, I suggest using

Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2431#comment:11>
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