[mythtv-commits] Ticket #13330: vappi2 - Temporary loss of audio when using skip

MythTV noreply at mythtv.org
Tue Oct 9 14:28:36 UTC 2018

#13330: vappi2 - Temporary loss of audio when using skip
     Reporter:  Mike Bibbings          |      Owner:  JYA
         Type:  Bug Report - General   |     Status:  new
     Priority:  minor                  |  Milestone:  needs_triage
    Component:  MythTV - Audio Output  |    Version:  Master Head
     Severity:  medium                 |   Keywords:
Ticket locked:  0                      |
 mythfrontend recorded program playback

 When using skip keys (left/right arrow on keyboard) audio stops for a
 period, video continues.
 The problem is mainly on skip back, although I have seen it on skip
 The audio period stop seems to coincide with the value for the appropriate
 skip , after which audio resumes.

 Primary deinterlacer default of Advanced (2x, HW-VA), if I use Advanced
 (HW-VA) no issue.

 Attached is an example mythfrontend log file (-v playback,libav,audio
 --loglevel debug)

 Source recorded program from dvb-t2 (UK Freeview) H.264 also happens on
 dvb-t (UK Freeview)

 Observed the issue on 4 different platforms all running Xubuntu 18.04 LTS
 with current mythtv master.

 Note: The mythbuntu ppa 30 does not have this issue as it does not have
 vaapi2, no builds for 23 weeks as of writing.

 Acer Revo RL80/Revo RL80, BIOS P11-A2L 11/20/2012
 Intel(R) Celeron(R) CPU 887 @ 1.50GHz (family: 0x6, model: 0x2a, stepping:
 External Screen Resolution 1920x1080 50Hz over hdmi

 Intel(R) Celeron(R) CPU N3450 @ 1.10GHz (family: 0x6, model: 0x5c,
 stepping: 0x9)
 External Screen Resolution 1920x1080 50Hz over hdmi

 STRIX B250F GAMING, BIOS 1205 05/11/2018
 Intel(R) Pentium(R) CPU G4400 @ 3.30GHz (family: 0x6, model: 0x5e,
 stepping: 0x3)
 External Resolution 1920x1080 50Hz over hdmi

 Acer Aspire V3-571/VA50_HC_CR, BIOS V2.15 03/11/2013
 Intel(R) Core(TM) i7-3632QM CPU @ 2.20GHz (family: 0x6, model: 0x3a,
 stepping: 0x9)
 Internal Screen Resolution 1366x768 60Hz (laptop builtin display)

Ticket URL: <https://code.mythtv.org/trac/ticket/13330>
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