[FFmpeg-trac] #3689(ffprobe:new): ffprobe identifies caption track as subtitle

FFmpeg trac at avcodec.org
Fri May 30 17:23:02 CEST 2014

#3689: ffprobe identifies caption track as subtitle
             Reporter:               |                     Type:  defect
  JerryScoggins                      |                 Priority:  normal
               Status:  new          |                  Version:
            Component:  ffprobe      |  unspecified
             Keywords:  caption      |               Blocked By:
  subtitle                           |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
 When I run the latest ffprobe on a QuickTime movie that contains a track
 of type 'clcp' the output from ffprobe says it's a subtitle track, which
 is incorrect.  In QuickTime, Closed Captioning tracks have the type
 'clcp', and Subtitle tracks have a type of 'sbtl' as documented in two
 sections of this page:

 The terms Closed Captioning and Subtitles are often used interchangeable,
 probably due to the way they're presented to the user but they are
 actually quite different in most every other aspect.

 For a good explanation of the differences between closed captioning and
 subtitle's, I would suggest Jason's overview at this URL:

 If you need sample media, or additional details, please ask.

 Thank you,
 Jerry Scoggins

Ticket URL: <https://trac.ffmpeg.org/ticket/3689>
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