[mythtv-commits] Ticket #12837: livetv: looped image playback after channel/program change

[MythTV]

#12837: livetv: looped image playback after channel/program change
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 Reporter:  warpme@…                 |          Owner:  jyavenard
     Type:  Bug Report - General     |         Status:  new
 Priority:  minor                    |      Milestone:  unknown
Component:  MythTV - Video Playback  |        Version:  Master Head
 Severity:  medium                   |     Resolution:
 Keywords:                           |  Ticket locked:  0
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Comment (by warpme@…):

 Peter,
 I lost faith will anybody look at this ticket so I deleted file. Sorry for
 that!
 File is here [http://warped.homenet.org/looped-playback.zip]

 The whole issue is interesting as it has kind of historical memory.
 I need to enter TV channel from particular set of liveTV channels if I
 want to trigger issue in future.


 Namely: walking on any 1080i H264 channels - no problems.


 To trigger issue I need:


 1.Enter any SD H264 channel from exact multiplex1


 2.Enter HD H264 channel from exact multiplex2


 3.Enter HD H264 channel from exact multiplex3


 Only such combination triggers issue.


 Key seems to entering any SD H264 channel from exact multiplex1.
 Without this steep I can walk on all 60+ HD channels no problem.

 Issue is only on Nvidia with Nvidia closed drivers. All works OK on Intel
 VAAPI and ATI Mesa VDPAU.
 On Nvidia it seems to not dependent on Nvidia BLOB version (tested legacy
 & current versions) nor HW (tested ION, ION2 and GT610M).


 I believe it is result how MythTV uses VDPAU on Nvidia drivers as I
 remember situation when gigem was updating scheduler on master. In that
 time there was short time window with bug about how LiveTV channel change
 works within the same mplex (mythtv was changing channels within the same
 mplex like between different mplexes). With this bug looped issue
 disappeared. This suggest me that issue is somehow timing related...


 Maybe we should made tests with mod where LiveTV channel change resets
 VDPAU on every channel change?

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Ticket URL: <https://code.mythtv.org/trac/ticket/12837#comment:4>
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