[mythtv] [mythtv-commits] Ticket #5552: AC3 passthrough causes accelerated playback on OSX 0.21 frontend
Michael T. Dean
mtdean at thirdcontact.com
Fri Jul 18 04:37:29 UTC 2008
On 07/17/2008 12:45 AM, MythTV wrote:
> #5552: AC3 passthrough causes accelerated playback on OSX 0.21 frontend
> When AC3 passthrough is selected on the OSX frontend, occasionally the
> video an audio begin playing at an accelerated rate. This usually happens
> when the show is not bookmarked - i.e. playback starts from the beginning
> of the file. It never happens if AC3 passthrough is un-checked.
> I've attached a log file. 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.
Are you sure the broadcaster isn't switching to 32kHz AC-3 at that
location and your sound card is continuing to read data at 48kHz? Most
all computer-based sound cards work only with 48kHz AC-3.
More information about the mythtv-dev