On 4/8/06, <b class="gmail_sendername">Tony Lill</b> <<a href="mailto:ajlill@ajlc.waterloo.on.ca">ajlill@ajlc.waterloo.on.ca</a>> wrote:<div><span class="gmail_quote"></span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>> 1). I have realtime enabled in Ubuntu. When I launch a recording, "using<br>> realtime prioirty" shows up in the log. When I look at TOP, under the PR<br>> column, I see that Mythfrontend priority is similar to other programs,
<br>> around the 30's. However, there are a few tasks, with 'RT" as priority,<br>> presumably reatltime. Should I expect to see RT for mythfrontend task as<br>> well?<br><br>That depends. Does ps show one "process" or many for mythfrontend? The
<br>frontend runs multiple threads, but only puts one of them in realtime<br>mode for playback. The latest ps on Debian hides the threads. Try<br>intalling htop, that will show them.</blockquote><div><br>That helps. I ran htop, and I see a threads with a priority of -2. Assume that means realtime. Makes sense now. Thank you!
<br></div><div><br></div><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">> 3). I have gotten no where near solving my audio sync issues. I have been
<br>> considering compiling a kernel with Ingo's realtime patch. There have been<br>> two posts on that subject. One saying that MythTv works and another asking<br>> if it is possible. Does anyone have further information on this? So far,
<br>> I have had trouble getting it to compile and I am expecting to have<br>> difficulty getting NVidia to work.<br><br>I have a suspicion that all the changes that have been put into the<br>2.6 kernels to make it work really well for enterprise servers or
<br>desktop have boned it for multimedia. Have you tried running a 2.4<br>kernel? All my recording problems started when I went from 2.4 to<br>2.6. If I wasn't so damned stubborn....</blockquote><div><br>I have built my system on Ubuntu and they are talking about including a real-time kernel in the post Dapper version. Looking forward to that. If I get ambitious, I might take another crack at compiling a vanilla kernel with real-time patches. I haven't been able to do that successfully yet, but I am sure it is possible.
<br></div><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Also are you sure the audio sync problems are in the playback,<br>and not the recording?
</blockquote><div><br>I have no idea where the problem is to be honest. It is pretty consistent that I will see 200mS delay in audio on HDTV programs (more so on 1080i, that 720p). I have posted that issue before but didn't get any replies which caused me to assume either I am too sensitive or others don't have the same problem. Got any ideas on how to troubleshoot a recording issue? I am using Fusion 5 Gold cards which are not very popular so it wouldn't surprise me if that was the problem.
<br><br>Off Topic, but funny-<br>My tardy reply was due to the fact that in my attempts to ensure I had realtime priority, I installed a new version of Pam over the Ubuntu's old version. Well, folks that understand PAM better than me probably know better than do that. Long story short, I bonked my whole system so I spent a day rebuilding it. For anyone that has "been there, done that" to top it all off, I decided to be smart and make detailed journal of the steps to get it working. Didn't realize that OpenOffice used the tmp directory (since I started the document from an email attachment) and I lost all of my great documentation after a reboot. Oh, well. By the way, even with my new system on Ubuntu Dapper and newer version of PAM, I still have audio delay. grumble.
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