[mythtv-users] ac3 passthrough results in accelerated video

scram69 scram69 at gmail.com
Wed Jun 4 03:35:48 UTC 2008

On Mon, Jun 2, 2008 at 9:04 PM, scram69 <scram69 at gmail.com> wrote:
> On Thu, May 29, 2008 at 8:18 PM, John P Poet <jppoet at gmail.com> wrote:
>> You can post a (possibly) useful log if you run mythfrontend with audio logging:
>> mythfrontend -v audio,libav,playback -l somelogfile
> Well, after 3 days of logging, I was finally able to capture
> back-to-back occurrences of accelerated and normal playback of the
> same recording.  The log file is attached.
> The accelerated playback session begins at the top of the file and
> ends at 21:29:24.  The normal playback session begins immediately
> afterward at 21:29:25.  The most obvious difference between the two is
> the appearance of a slew of " NVP: Video is x.xxxx frames behind audio
> (too slow), dropping frame to catch up." messages once playback begins
> in the first case.  However, there's a lot of stuff in the verbose
> logs - unfortunately, anything i saw in the first case that looked
> like it might be some sort of problem or error message was repeated in
> the second case.  But hopefully, the trained eye can spot some key
> difference...
> Interestingly, this recording was Saturday Night Live, which
> apparently is only 2-channel audio.  However, I've seen the
> accelerated behavior occur on many 5.1 shows as well.
One more try with a trimmed down version of the log to get past the
list's 40K limit..

"The Linux of transportation."
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