[mythtv-commits] Ticket #11304: Judder and incorrect playback timer when FPS changes

[MythTV]

#11304: Judder and incorrect playback timer when FPS changes
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 Reporter:  Brian <knappster_1@…>  |           Type:  Bug Report - General
   Status:  new                    |       Priority:  minor
Milestone:  unknown                |      Component:  MythTV - General
  Version:  0.25.2                 |       Severity:  medium
 Keywords:                         |  Ticket locked:  0
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 I recently added an HDHomerun Prime and found that when I watch some
 content on cable channels in HD, I get judder and the recording lengths
 are incorrect (until the recording completes at which point it seems to
 self-correct).  It seems to happen on 1080i recordings when the FPS
 changes (show is 24 fps, some commercials are 30 fps).  To fix the judder,
 I have to exit the recording and start playing from the bookmark again.
 It seems to play smoothly until the next commercial.  It also happens on
 live TV.

 Example:[[BR]]
 (1) 8:00 pm - Burn Notice begins recording on USA HD (1080i 2 hour
 recording)[[BR]]
 (2) 9:00 pm - I begin watching from the beginning of the recording.  Total
 length of recording reports approx. 50 minutes (should be 60 mins)[[BR]]
 (3) First commercial break - Skip forward past commercials, now there is
 judder in playback[[BR]]
 (4) Exit to "Watch Recordings Menu" - Play from Bookmark[[BR]]
 (5) Playback is fine until next commercial break[[BR]]
 (6) Repeat steps (4) & (5) with every commercial break until finished
 watching[[BR]]
 (7) When the end of the recording is reached, it is at 1:41 of 2:01.

 I then went back to Live TV and watched part of a rebroadcast and turned
 on the Playback Data on the frontend.  I noticed that when the show was
 playing the FPS was 24 (jumped around between 23-25).  When the
 commercials came up, some were the same, others were 29.9 FPS.

 FWIW, this seems to be related to an incredibly old ticket #1941, which
 was closed due to being a duplicate of ticket #799, which seemed slightly
 different and has since been fixed/closed.

 I am using LinHES R7.4 (arch linux, Mythtv 0.25-2).  I would be happy to
 provide more information if it can help.  I have not seen this issue on
 the local channels, which I have watched in HD for the last 2 years with
 the original HDHomerun.  I have only just recently gotten the HDHomerun
 prime so I don't know if the issue was there with previous versions of
 myth, too.

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Ticket URL: <http://code.mythtv.org/trac/ticket/11304>
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