[FFmpeg-trac] #7018(undetermined:closed): cc_dec decoder very slow at extracting CEA-708 closed captions from mpeg2ts file

[FFmpeg]

#7018: cc_dec decoder very slow at extracting CEA-708 closed captions from mpeg2ts
file
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             Reporter:  devesh       |                    Owner:
                 Type:  defect       |                   Status:  closed
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:
                                     |  needs_more_info
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by tmm1):

 This is because the closed caption data is embedded inside the mpeg2 video
 frames, and ffmpeg is decoding the entire video frame in order to extract
 the caption data. There is a cbs_userdata patchset on the ffmpeg-devel
 mailing list which could be used to extract a53cc packets without the
 overhead of video decoding.

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Ticket URL: <https://trac.ffmpeg.org/ticket/7018#comment:2>
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