[mythtv-commits] Ticket #12054: Local commercials confuse CEA-608 caption decoding

[MythTV]

#12054: Local commercials confuse CEA-608 caption decoding
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     Reporter:  faginbagin <mythtv@…>  |      Owner:  stichnot
         Type:  Bug Report - General   |     Status:  new
     Priority:  minor                  |  Milestone:  unknown
    Component:  MythTV - Captions      |    Version:  0.27-fixes
     Severity:  medium                 |   Keywords:
Ticket locked:  0                      |
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 There's something about the way WOW inserts local commercials that
 effectively disables display of CEA-608 captions. When it happens, I can
 get the captions to display by stopping (with set bookmark on exit
 enabled) and resuming playback. I am attaching cc608-disappears.mpg, a one
 minute video clip that demonstrates the problem. To reproduce:
 * Put cc608-disappears.mpg in your video library.
 * Scan for changes
 * Generate filemarkup with: mythcommflag --video cc608-disappears.mpg
 * Play cc608-disappears.mpg.
 * Turn on closed captions. You can see the transition from end of the Gold
 Bond commercial is abrupt and goes to the last second of what I presume is
 a commercial provided by Comedy Central and replaced by WOW. This is
 followed by The Daily Show where you should see roll-up captions lagging a
 couple of seconds behind Jon Stewart introducing Jon Hamm, but none are
 displayed.
 * Back up to about the 17 second point, where The Daily Show resumes from
 the commercial break. Set a bookmark and exit.
 * Play the video from the bookmark.
 * Turn on closed captions. You should now see the roll-up captions.
 * Seek to the beginning of the video and resume playback. No captions are
 displayed.

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Ticket URL: <https://code.mythtv.org/trac/ticket/12054>
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