#3689: ffprobe identifies caption track as subtitle
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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 |
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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:
https://developer.apple.com/library/mac/documentation/QuickTime/qtff/QTFFChap3/qtff3.html#//apple_ref/doc/uid/TP40000939-CH205-SW87
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:
https://cpcweb.zendesk.com/entries/25142571-Closed-Captions-vs-Subtitles
If you need sample media, or additional details, please ask.
Thank you,
Jerry Scoggins
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Ticket URL: <https://trac.ffmpeg.org/ticket/3689>
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