[FFmpeg-trac] #1778(undetermined:open): EIA-608 / EIA-708 Closed Captions disappear when transcoding/reencoding

FFmpeg trac at avcodec.org
Tue Oct 2 21:33:54 CEST 2012


#1778: EIA-608 / EIA-708 Closed Captions disappear when transcoding/reencoding
-------------------------------------+-------------------------------------
             Reporter:  mikecheat04  |                    Owner:
                 Type:  enhancement  |                   Status:  open
             Priority:  wish         |                Component:
              Version:  git-master   |  undetermined
             Keywords:  cc           |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
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Comment (by reimar):

 The situation is not quite as simple.
 The problem in this specific case is that it does not have CC data in a
 separate stream but embedded in the video frame data.
 FFmpeg currently has no way of handling this mess where one stream (video)
 contains another one (subtitles/CC).
 CC in e.g. wtv, mxf and even mov as in ticket #846 is actually supported
 in so far as extracting it is possible, we just can't decode it into plain
 text or such and we can't mux it either.

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1778#comment:4>
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