Opened 6 years ago
Closed 6 years ago
Last modified 6 years ago
#13330 closed Bug Report - General (fixed)
vaapi2 - Temporary loss of audio when using skip
| Reported by: | Mike Bibbings | Owned by: | Peter Bennett |
|---|---|---|---|
| Priority: | minor | Milestone: | 30.0 |
| Component: | MythTV - Audio Output | Version: | Master Head |
| Severity: | medium | Keywords: | |
| Cc: | Ticket locked: | no |
Description
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 forward. 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: 0x7) External Screen Resolution 1920x1080 50Hz over hdmi
NEWPOWER INTERNATION GROUP LIMITED N34/AB1, BIOS 00.17 11/25/2017 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)
Attachments (1)
Change History (9)
Changed 6 years ago by
| Attachment: | mythfrontend.20181009141416.2956.log.zip added |
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comment:1 Changed 6 years ago by
| Owner: | changed from JYA to Peter Bennett |
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| Status: | new → assigned |
comment:2 Changed 6 years ago by
| Summary: | vappi2 - Temporary loss of audio when using skip → vaapi2 - Temporary loss of audio when using skip |
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comment:3 Changed 6 years ago by
| Milestone: | needs_triage → 30.0 |
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comment:4 Changed 6 years ago by
I can recreate this. It does not seem consistent, sometimes jump back shuts off audio and sometimes it does not.
I have developed a new audio-video sync routine that is simpler than the existing one in MythTV. It is not yet committed. It works for everything except DVB-radio at the moment. Your problem does not happen with this new AVSync. Let me know if you would like a preview patch to compile yourself and test.
comment:6 Changed 6 years ago by
| Resolution: | → Fixed |
|---|---|
| Status: | assigned → closed |
I have pulled out the part of the new video sync that fixes this and committed it.
commit 4651002fc0c96c760bd243f9f5ac4df185cc1eab (HEAD -> master, origin/master) Author: Peter Bennett Date: Thu Oct 11 15:42:17 2018 -0400
Video playback: Fix issue where jump back loses audio
The code that skips audio from before the first frame, sometimes skips audio after a jump back, if some frames are processed out of sequyence. Bypass this check when using frame timing.
Fixes #13330
mythfrontend log