<div class="gmail_quote">On Sun, Dec 26, 2010 at 12:23 PM, <span dir="ltr"><<a href="mailto:pnetherwood@email.com">pnetherwood@email.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi<br>
<br>
Since upgrading to 0.24 my Acer R3600 Revo's have been stuttering on playback. It was all fine 0.23. It noticed in the logs it was mentioning failing to do a preview which always seemed to occur at the same time as the buffer underruns. Below is a snippet from my log:<br>
<br>
2010-12-25 20:10:48.104 AO: Opening audio device 'hdmi:CARD=NVidia,DEV=0' ch 2(2) sr 48000 sf signed 16 bit reenc 0<br>
2010-12-25 20:10:48.107 AudioPlayer: Enabling Audio<br>
2010-12-25 20:10:49.555 VDPAU: Created 2 output surfaces.<br>
2010-12-25 20:10:49.555 VDPAU: Version 1<br>
2010-12-25 20:10:49.555 VDPAU: Information NVIDIA VDPAU Driver Shared Library 256.44 Thu Jul 29 01:59:12 PDT 2010<br>
2010-12-25 20:10:49.555 VDPAU: Created VDPAU render device 1280x720<br>
2010-12-25 20:10:49.737 Player(0): Forcing decode extra audio option on (Video method requires it).<br>
2010-12-25 20:10:49.978 Player(0): Video timing method: USleep with busy wait<br>
2010-12-25 20:10:49.979 TV: Changing from None to WatchingPreRecorded<br>
2010-12-25 20:10:50.056 VDPAU: Added 2 output surfaces (total 4, max 4)<br>
2010-12-25 20:10:50.183 ALSA, Error: WriteAudio: buffer underrun<br>
2010-12-25 20:36:07.118 ALSA, Error: WriteAudio: buffer underrun<br>
2010-12-25 20:36:07.914 ALSA, Error: WriteAudio: buffer underrun<br>
2010-12-25 20:36:08.517 ALSA, Error: WriteAudio: buffer underrun<br>
2010-12-25 20:36:09.644 PlaybackBox: Ignoring PREVIEW_SUCCESS, item no longer on screen.<br>
2010-12-25 20:36:12.526 ALSA, Error: WriteAudio: buffer underrun<br>
<br>
Anyone know why its trying to do a preview in the middle of a playback? I did notice an old setting in my settings table relating to previews called "PlaybackPreview" which I set from 1 to 0 with no effect. Probably a relic from 0.21 when previews worked but with no effect.<br>
<br>
I also seem to get the problem when it appears to be waiting for video buffers:<br>
<br>
2010-12-25 21:10:05.245 ALSA, Error: WriteAudio: buffer underrun<br>
2010-12-25 21:10:05.427 Player(0): Waited 100ms for video buffers AAAAAAdAAAADLLAAA<br>
2010-12-25 21:10:05.438 Player(0): Waited 100ms for video buffers AAAAAAdAAAADLLAAA<br>
2010-12-25 21:10:05.444 Player(0): Waited 100ms for video buffers AAAAAAdAAAADLLAAA<br>
2010-12-25 21:10:05.454 Player(0): Waited 100ms for video buffers AAAAAAdAAAADLLAAA<br>
2010-12-25 21:10:05.558 Player(0): Waited 100ms for video buffers AAAAAAdAAAADLLAAA<br>
2010-12-25 21:10:05.564 Player(0): Waited 100ms for video buffers AAAAAAdAAAADLLAAA<br>
2010-12-25 21:10:05.580 Player(0): Waited 100ms for video buffers AAAAAAdAAAADLLAAA<br>
2010-12-25 21:10:05.684 Player(0): Waited 100ms for video buffers AAAAAAdAAAADLLAAA<br>
2010-12-25 21:10:05.700 Player(0): Waited 100ms for video buffers AAAAAAdAAAADLLAAA<br>
<br>
Unfortunately -v audio didn't add any extra infor at teh time of the buffer underruns.<br>
I'm not sure if these are related or two separate problems. My ALSA device is: hdmi:CARD=NVidia,DEV=0. I have also tried using ALSA:default and changing the buffer size my .asoundrc file which didn't help much. I have also tried increasing by VDPAU buffer size to 32 in the filter settings with no effect. I'm using version fixes/0.24 [f3ddc58]. My alsa version is 1.0.22.1<br>
<br>
Any thoughts?<br>
<br>
Paul<br></blockquote></div><br>I was able to get rid of the "WriteAudio: buffer underrun" problem by enabling "Extra audio buffering" under "Utilities/Setup --> Setup --> TV Settings --> Playback". (It only happened while watching 720p HD, not 1080p, which was interesting.)<br>
<br>--Dave<br>