[mythtv-commits] Ticket #10007: Video lags audio (sync) by ~400ms on hd pvr 1212 h264 recordings (only) after firmware update.

MythTV noreply at mythtv.org
Wed Nov 9 16:04:11 UTC 2011


#10007: Video lags audio (sync) by ~400ms on hd pvr 1212 h264 recordings (only)
after firmware update.
-------------------------------------+----------------------------
 Reporter:  gdelx001@…               |          Owner:  danielk
     Type:  Bug Report - General     |         Status:  infoneeded
 Priority:  minor                    |      Milestone:  unknown
Component:  MythTV - Video Playback  |        Version:  0.24.1
 Severity:  medium                   |     Resolution:
 Keywords:  video lag sync           |  Ticket locked:  0
-------------------------------------+----------------------------

Comment (by gdelx001@…):

 Please instruct (or reference) how to extract the sample.  Keep in mind
 the clear examples (mouth motions not in sync with dialog) may be some
 time into the recording which may not be where the problem is set up.
 Also do you want some sample of pre-firmware-upgrade files that don't have
 the problem?

 Can I please share a link to what samples I get offline?

 Now the delay of audio required I typically see is 3500ms or more!!!  And
 (I don't have the log handy to excerpt) but in one case myth repeatedly
 complains about the inconsistency that it is trying desperately to advance
 the sound further but already 180 video frames have been buffered.
 Evidence at least that myth has been misled to overcompensate in the wrong
 direction (by firing audio play _early_), and kinda knows it.

 Audio recorded is SPDIF.

 STB is Motorola QIP 7100.

-- 
Ticket URL: <http://code.mythtv.org/trac/ticket/10007#comment:4>
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