[mythtv-users] Playback problem -- random short pauses
Michael Drons
mdrons at yahoo.com
Thu Mar 24 15:26:12 UTC 2011
I see the same issue on my FE device. I can't answer the issue either when
asked. I usually blam it on the video source switching from 480p to 720p (ie a
commercial). But I know it does it other times.
I see the same ALSA errors.
I have not spent the time trying to determine the issue. If you get anywhere or
need additional data, please let me know as I am willing to provide debug/logs.
My FE/BE is trunk.
Mike
>
>From: Kenneth Emerson <kenneth.emerson at gmail.com>
>To: Discussion about mythtv <mythtv-users at mythtv.org>
>Sent: Thu, March 24, 2011 11:03:28 AM
>Subject: [mythtv-users] Playback problem -- random short pauses
>
>I have been following several of the threads on this list (and the commit list)
>that have talked about "stuttering" during playback. I don't believe that these
>issues are describing what I am seeing on my system. My symptoms seem to have
>started happening about two months ago but I cannot pinpoint the time to some
>specific change in either my FE/BE combination or the version of mythTV. I keep
>both my OS (Ubuntu 10.04 32 bit) and mythTV (24-fixes currently
>v0.24-227-gccd73be) up to date. My version of NVIDIA driver is 260.19.21. My
>system is based on an Intel Q6600 quad core 2.4GHz cpu. The video being watched
>is primarily either 720p or 1080i material. I don't believe I have ever seen
>the problem on 480 material, but that data set may be too small to matter.
>
>
>The specific problem I see during playback is a random, short pause with either
>missing frames or missing audio; hard to tell which. The pause is very short
>(less than 2 seconds) but long enough to miss 1-3 words of the dialog. The
>video is not damaged since I can back up and replay the same segment without any
>interruption. These pauses are random and occur anywhere from none in an
>hour-long show to four or five times in that period. It is not related to the
>scheduler starting/stopping other recordings as I check my watch every time one
>occurs. I do see a slight stutter, occasionally, when I know there are other
>recordings stopping/starting and that is a different and less annoying symptom.
> I also limit the number of simultaneous jobs to two and I hold off commflagging
>until after the recordings have finished. There appears to be nothing of
>interest in the frontend log. I occasionally see "ALSA, Error: WriteAudio:
>buffer underrun" messages, but these do not seem to correlate to the pauses.
>
>
>I am looking for any ideas on how to proceed to troubleshoot this problem. The
>WAF is not plummeting, but I do get the occasional, exasperated question "Why
>does it do that?" which, unfortunately, I cannot answer but desperately want to
>be able to.
>
>
>-- Ken E.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.mythtv.org/pipermail/mythtv-users/attachments/20110324/94fda8bd/attachment.html
More information about the mythtv-users
mailing list