[mythtv-commits] Ticket #13016: Missing Teletext Subtitles in Recordings

[MythTV]

#13016: Missing Teletext Subtitles in Recordings
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     Reporter:  angela.schmid@…      |      Owner:  stichnot
         Type:  Bug Report -         |     Status:  new
  General                            |
     Priority:  minor                |  Milestone:  unknown
    Component:  MythTV - Captions    |    Version:  0.28.1
     Severity:  medium               |   Keywords:  teletext subtitles
Ticket locked:  0                    |  captions
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 I notice a lot of missing CC text from Teletext Subtitles in DVB-C
 recordings independent of the recorded channel.

 VLC, ccextractor, FFmpeg 3.2.4 show all CC text correct.
 MythTV player and mythccextractor miss almost every second/third CC text.
 In a recording Myth found only 732 of 1651 total.

 Inspecting the ccextractor generated srt file doesn’t show any timing
 problems, which could be misinterpreted by MythTV.

 I tried VBI debugging, but no CC text was logged.

 Also no “subtl timecode” from libs/libmythtv/avformatdecoder.cpp
 AvFormatDecoder::ProcessSubtitlePacket although proper debugging options
 were set.

 Appreciate any pointers where to add some debugging to help.

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Ticket URL: <https://code.mythtv.org/trac/ticket/13016>
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