[mythtv-users] HD-PVR audio sync issues
Jim at Morton.hrcoxmail.com
Mon Jan 17 21:55:46 UTC 2011
On 1/17/2011 4:20 PM, mythtv at blandford.net wrote:
> I recently made the transition from cable to dish network.
> I am running Fedora 14 with mythtv from rpmfusion 0.24-2.fc14.x86_64
> My backend has two HD-PVRs connecting to dishnetwork vip 211k
> receivers using SPDIF.
> I am having bad audio sync issues. I see it in two cases.
> 1) When changing channels the audio is off by about 2 seconds. This
> can some times be fixed by changing to a different channel and back,
> but not always.
> 2) Watching a show for 30 minutes will result in 2-3 second audio lag
> by the end of the show. Exiting and coming back into the channel
> fixes the issue.
> I see lots of posts from people who are using the HD-PVR, so I am
> guessing I am missing some simple setup peice.
> Any suggestions on how to eliminate the audio lag issues?
I have a similar setup since August 2010 except audio is over the
composite cables. My BE was set to run 2 jobs and begin commercial
detection when it began recording. I was have progressive audio drift
throughout some shows and by the end of the show it was off by as much
as 5 seconds. Often the recording would just quit about 46 minutes into
an hour show.
Setting the BE to 1 job at a time and to wait until the recording is
complete before beginning commercial detection is what fixed it. At the
time I did not believe that was going to make a difference but after a
couple of months of no recurrence I am a believer.
Your description of the problem is slightly different so I'm not sure
you have the same issue I did but just to test I suggest you try
reducing the job load and see if that makes a difference.
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