On Wed, June 13, 2012 3:14 am, Eric Shubert wrote: > On 06/08/2012 08:07 PM, Eric Shubert wrote: >> On 06/08/2012 05:19 PM, Eric Shubert wrote: >>> I have a bit of a problem with 0.25. >>> >>> I have a BE and 2 FEs which were running 0.24. I upgraded the BE >>> (mythbuntu) and one FE (Lucid w/ mythbuntu repos) to 0.25 and they're >>> running fine. >>> >>> The other FE I (re)built from scratch on Precise. That FE works fine >>> for >>> live TV (using BE), but recorded programs have a problem. When playing >>> recorded programs, the audio lags the video by a couple seconds. This >>> happens on all recordings that were made with 0.24. Since upgrading >>> everything to 0.25, I have 3 programs recorded so far. Two play ok on >>> the problem host, but one plays out of sync like the 0.24 recordings. >>> It's the 2nd of the 3 recordings that plays out of sync. >>> >>> All hosts are up to date with the latest packages from the mythbuntu >>> repos. >>> >>> Anyone have any ideas where to look for a resolution? I'll be glad to >>> post any information which may be helpful. >>> >>> TIA. >> >> I've tried changing various settings, largely to no avail. Something has >> changed since yesterday though (updated pulseaudio-client package >> perhaps?) which has improve things slightly. >> >> I notice now that all 1080i recordings are playing normally. I know for >> certain that this was not the case yesterday. I also notice that all >> recordings which play with the audio sync problem (audio lags 1-2 >> seconds, and the amount of lag appears to vary between recordings) are >> show 720p for resolution. On recordings that show nothing for >> resolution, some have the lag and some don't. >> >> So the scenario now appears to be unlrelated to which version made the >> recordings. The differentiating factor appears to go along with the >> broadcast resolution. IOW, when a program is broadcast in 1080i, the >> audio is X and it works, while with 720p broadcasts, the audio is Y >> which has the problem playing back. >> >> I'll try to get some more recordings to see if I can narrow things down >> a bit more. I haven't see this with any live TV programs, but that's not >> to say it can't happen. >> >> Any ideas are appreciated. >> > > For posterity. I tried a different tact, which was to install mythbuntu > first, then enable ubuntu desktop from the mythbuntu control center. > Audio sync is now flawless. > > I think the problem was related to pulse audio. With the new setup, I > configured with the alsa hdmi device instead of pulse. I did try > changing the former ubunutu/myth installation to the same hdmi device, > but I got no audio at all with that. I'm guessing that some of the other > audio adjustments I made trying to fix the problem caused it to not > work. I didn't see any point in chasing down that path further since I > have a working system now. > > P.S. FWIW, I'm running this frontend from an 8G USB drive. Booting is a > little slower than the HDD, and updates take a bit longer (not that > updates on the HDD were very fast). Normal/typical operation is > otherwise very nice though. $10 for 2 8G drives (one live, one backup) > vs $60 or more for a 2.5" HDD. I've opted for the former, and am very > happy with my decision. There are some tweaks I can make to reduce i/o > to the USB drive, but it's working nicely even w/out doing that yet. >
Take a look at http://code.mythtv.org/trac/ticket/10797 There is a thread on MythTV Users around a similar audio sync problem. Steve -------------------------------------------- Steven Ellis - Technical Director OpenMedia Limited - The Home of myPVR email - ste...@openmedia.co.nz website - http://www.openmedia.co.nz -- Ubuntu-mythtv mailing list Ubuntu-mythtv@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-mythtv
