i too have freezing similar to how you describe. i've not worked it out to a specific cause yet, but i will be keeping an eye on this thread to see how it progresses.<div><br></div><div>im thinking it's something todo with CPU, HDD or possibly the gpu decoding. the 2 times i've noticed it, has been at what i'd expect higher bit-rate scenes to be; major change in screen content one of which was a HD channel. it's fairly rare on my system though. infact the other night i watched tv perfectly for 3hours on various channels (HD included) and it was fine. on a previous install, i seem to recall having TOP running when a pause occured; top was still responding and no weird utilization either..</div>
<div><br></div><div><br></div><div><br><div class="gmail_quote">On 24 March 2011 15:36, Nasa <span dir="ltr"><<a href="mailto:nasa01@comcast.net">nasa01@comcast.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Mike,<br>
<br>
I have seen these *pauses* as well -- and you do a good job describing<br>
it. The only execpetion I have is that the pauses can be longer than<br>
2 seconds(in some cases, much). I haven't taken the time to troubleshoot<br>
this and thus haven't put in a bug report.<br>
<br>
Thanks for hitting the list with this, it maybe more prevelant than<br>
just me :}<br>
<font color="#888888"><br>
Nasa<br>
</font><div><div></div><div class="h5"><br>
----- "Michael Drons" <<a href="mailto:mdrons@yahoo.com">mdrons@yahoo.com</a>> wrote:<br>
<br>
> I see the same issue on my FE device. I can't answer the issue either<br>
> when asked. I usually blam it on the video source switching from 480p<br>
> to 720p (ie a commercial). But I know it does it other times. <br>
><br>
> I see the same ALSA errors.<br>
><br>
> I have not spent the time trying to determine the issue. If you get<br>
> anywhere or need additional data, please let me know as I am willing<br>
> to provide debug/logs.<br>
><br>
> My FE/BE is trunk. <br>
><br>
> Mike<br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
> From: Kenneth Emerson <<a href="mailto:kenneth.emerson@gmail.com">kenneth.emerson@gmail.com</a>><br>
> To: Discussion about mythtv <<a href="mailto:mythtv-users@mythtv.org">mythtv-users@mythtv.org</a>><br>
> Sent: Thu, March 24, 2011 11:03:28 AM<br>
> Subject: [mythtv-users] Playback problem -- random short pauses<br>
><br>
> I have been following several of the threads on this list (and the<br>
> commit list) that have talked about "stuttering" during playback. I<br>
> don't believe that these issues are describing what I am seeing on my<br>
> system. My symptoms seem to have started happening about two months<br>
> ago but I cannot pinpoint the time to some specific change in either<br>
> my FE/BE combination or the version of mythTV. I keep both my OS<br>
> (Ubuntu 10.04 32 bit) and mythTV (24-fixes currently<br>
> v0.24-227-gccd73be) up to date. My version of NVIDIA driver is<br>
> 260.19.21. My system is based on an Intel Q6600 quad core 2.4GHz cpu.<br>
> The video being watched is primarily either 720p or 1080i material.<br>
> I don't believe I have ever seen the problem on 480 material, but<br>
> that data set may be too small to matter.<br>
><br>
><br>
> The specific problem I see during playback is a random, short pause<br>
> with either missing frames or missing audio; hard to tell which. The<br>
> pause is very short (less than 2 seconds) but long enough to miss 1-3<br>
> words of the dialog. The video is not damaged since I can back up and<br>
> replay the same segment without any interruption. These pauses are<br>
> random and occur anywhere from none in an hour-long show to four or<br>
> five times in that period. It is not related to the scheduler<br>
> starting/stopping other recordings as I check my watch every time one<br>
> occurs. I do see a slight stutter, occasionally, when I know there<br>
> are other recordings stopping/starting and that is a different and<br>
> less annoying symptom. I also limit the number of simultaneous jobs<br>
> to two and I hold off commflagging until after the recordings have<br>
> finished. There appears to be nothing of interest in the frontend<br>
> log. I occasionally see "ALSA, Error: WriteAudio: buffer underrun"<br>
> messages, but these do not seem to correlate to the pauses.<br>
><br>
><br>
> I am looking for any ideas on how to proceed to troubleshoot this<br>
> problem. The WAF is not plummeting, but I do get the occasional,<br>
> exasperated question "Why does it do that?" which, unfortunately, I<br>
> cannot answer but desperately want to be able to.<br>
><br>
><br>
> -- Ken E.<br>
><br>
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