Video skips forward about half a second. Most commonly, the only thing I'll notice when watching a video is that a small chunk of it was skipped over and wasn't played at all. There's no stuttering or stalling at this time; it's an immediate skip-forward, and if I go back in playback position the part I missed plays fine (so it's not a problem with the videos themselves).
.. but at least one time I was able to catch that the sound immediately skipped ahead this amount and the video quickly sped up to catch up.
The main difference from other problems I've experienced or read about is that rather than stalling or pausing briefly, the video seems to inexplicably skip forward. It will be playing fine and then suddenly I'll miss a brief chunk of someone's sentence.
I've uploaded a simulated example of the problem above. (Notice the "that" in Porky's expression is missing.) You can check the attachment if you prefer. I have only one usable real recording of the problem, but it does a poor job at showcasing it and it's hard to tell based on the time it occurred (there was no talking).
Randomly. I've been unable to link it with anything. It happens with Windows Media Player, jetAudio, and Media Player Classic - in other words, all of the players I've tried - so I'm pretty confident it's not the fault of any particular player.
I've used Windows XP's "Performance" administrative tool to log a ton of information about what's going on with my computer every second (surprisingly this doesn't appear to use up much CPU at all, but it uses up a lot of disk space). When I look in the log for the time a skip occurred, as of yet I've been unable to find anything consistent but I'm still trying. What's for sure is that when this happens, there is no significant processor or disk usage logged at the time.
I wrote a basic program in C# (.NET) which uses a Windows Media Player object (that was the simplest option) and a timer in order to log the skips. After trying to fix the problem, I usually leave this program running all night as a test, and I record my sound card's output ("What U Hear") in order to verify that a skip-forward occurred where it was detected. But all this does is let me know if the problem still exists. It hasn't helped me to solve it as of yet.
Using this in conjunction with the performance logs, I thought, could help me figure out what causes the problem. At first I thought I was getting somewhere with consistent and significant "page fault"s every time a skip-forward was logged, but these page faults were CAUSED by the skip information being logged to file by the program! So basically all the information I got from that has been questionable so far. I haven't run the test overnight since I removed the log-to-file bit (it just fills up a textbox with the info instead).
(update) Once again, I can't seem to gather any useful information from the performance logs except for one thing that seems consistent across every instance of the problem and that I didn't notice before: the % User Time for the video playback tester spikes up to about 36% usage from about 24% on average. That doesn't appear to be enough to cause the problem, but as the samples are taken every second I suppose it could be a big spike that took place in less than a second on one of the cores. But anyway, I don't know.
How I need help:
What I'm hoping is that I can get some information on why a problem like this might be caused, and how I can further diagnose it and, hopefully, solve it. If there's any other information you need, please tell me and I'll be sure to get it for you.
Some things I've tried:
- I just recently built this system. The problem has persisted through repartitioning and reformatting and reinstallations, but I won't rule out that it could be caused by a piece of software I've installed..
- I've tried various player options that I can't think of right now.
- So far I've been unable to reproduce the problem with my Realtek onboard "HD audio," but I would much prefer to use the Audigy. Also, this sound card was in my previous computer (ASUS A7N8X Deluxe, Athlon XP 3000, 1.5GB RAM) and I never had this problem even though I watched a lot of videos. I've tried installing older sound drivers, but that didn't solve the problem... I've checked to make sure the sound card was seated correctly and tried moving it to another PCI slot but that didn't help. By the way, I'm not positive it's the Audigy's fault. The card performs beautifully other than this issue which may/may not be related to it.
- I've tried checking available system temperatures and they all seem within normal range. I haven't seen the CPU get over 50C, but the video card approaches 60C during normal use and 90C during intense use (video games), the latter of which doesn't apply to the skip-forward issue.
- I've tried copying videos over to drive D: from drive L: before playing but there was no difference.
- (as described above) Created a test program to log occurrences of the skip-ahead and checked performance logs for the time the skip occurred. So far fruitless and no significant disk usage or CPU usage has been linked to the problem yet.
(new) - I removed nVidia's IDE driver in favor of the standard Windows driver. This may or may not be related, but I had a record number of skips logged when testing after doing this.
3/15/2007 12:20:54 PM: 00:55: 381ms * 3/15/2007 12:36:09 PM: 16:10: 399ms * 3/15/2007 12:37:55 PM: 17:57: 389ms * 3/15/2007 12:54:49 PM: 34:51: 392ms * 3/15/2007 1:11:43 PM: 08:45: 395ms * 3/15/2007 1:14:09 PM: 11:12: 384ms * 3/15/2007 1:24:00 PM: 21:03: 390ms * 3/15/2007 1:31:09 PM: 28:12: 415ms * 3/15/2007 1:31:30 PM: 28:34: 391ms * 3/15/2007 1:40:45 PM: 37:49: 414ms * 3/15/2007 1:55:36 PM: 09:40: 376ms * 3/15/2007 1:59:44 PM: 13:49: 406ms *Unfortunately, for some reason the Performance monitor wasn't logging so I can't see any information about what was going on at the time. It was probably pointless to even post the skip times and amounts. There's nothing useful in the Event Viewer either.
But by comparison, the usual number of skips logged in a 6-hour period is two or three. This obviously is far more than that, and they happened close together. They stopped happening completely after 2:00 PM, though. Hmm. Once again, virtually useless information.
Motherboard: Asus P5N-E SLI
CPU: Intel Core 2 Duo E6600
RAM: 2 x [1GB DDR2 667MHz]
Video card: ATI Radeon X800 XT
Sound card: Creative Sound Blaster Audigy 2 ZS
OS: Windows XP Professional SP2; all latest updates
1 - Western Digital WD1600AAJS (SATA 3 Gb/s, 160GB; Main system drive with 3069MB pagefile; C: for Windows and F: for (large) programs and documents)
2 - Seagate Barracuda 7200.10 ST3320620AS (SATA 3 Gb/s, 320GB; Data drive, also has a pagefile of 4096MB; D:)
3 - Western Digital WD5000KS (SATA 3 Gb/s, 500GB; Data drive; L:)
Though it seems that this problem is limited to the Audigy, that may not be the case, and even so it works fine in every other way and this problem seems pretty obscure. Is there any way I can be sure or any way I can fix it or diagnose it? That's what I'd like to know. Thanks.
I would upload minute-long segments of the performance logs of the glitches but I'd have to compress them for them to fit in the 500KB space. That much is okay and I was able to accomplish it but geekstogo won't allow the 7-zip format to be uploaded.
- Siree Bob
Edited by Siree Bob, 15 March 2007 - 05:31 PM.