whats causing desync in fraps

Ive been trying to figure this out for a long time now. ive uninstalled the ai suite turbo V and epu like they say and did a clear cmos on my motherboard to return to factory settings. and i still get desync. i have well then enough computer to run the game and fraps. im using fraps 3.4.6.
here is my system:

cpu: phenom ii x4 955
mobo: crosshair v formula
graphics: xfx hd 6870
ram: gskill ripjaws 8 gb @ 1600
i record to another internall hdd and it has 250 gig of free space
the first video starts out synced and slowely desynce to were the video is first then the audio. after the 4 gb clip it starts out desynced so you cant just line them up in some tutorials. i have all of my recording and playback sounds set to 44100 Hz. ive even used vlc player and no go. encoding it doesnt work. my sound card is realtech but switching it to 44100 Hz is suppose to fix that. i am trying to recors epsxe at 720p that shouldn't be no problem. ive uninstalled and reinstalled fraps. no go. differand games dont make a differance. i have frpas set to record at 29.97 fps. sitll no effect. i reinstalled my sound card drivers, no avail. i think that just about sums it up. help me if you can

hi Ben, so it looks like you have tried a lot of these ideas already

Is there anything here you haven't tried yet?

dont worry im a nice guy.

only think that i havnt done yet is reinstall video card drivers

No worries -- I'm here because I enjoy it

Let me know how your audio sync thing goes. Have you tried workaround #2 - VirtualDub? That sounds the most promising to me (never had a sync problem myself).

i did that. When fraps splits its videos up into 4 gb parts the next section starts out desynced so its harder to sync up here is a video about me desync.

http://www.youtube.com/watch?v=IXjuX7jRgXQ theres the video after virtual dub. it still seems off

Oh yeah, right, the segments. Sounds like you would have to join the video of all the segments, then separately join the audio of all the segments, then sync. I realize this isn't an answer, just thinking out loud.

I don't know if you've heard of AviSynth. It's hard to explain, but you write a script like:

AviSource("file1.avi") + AviSource("file2.avi")

...and save it as "test.avs" for example. Now you open test.avs in Media Player, VirtualDub etc as a movie file (Avisynth acts as a frameserver - a virtual video source) -and the movie will consist of file1.avi joined to file2.avi.

Now here's why I mention it: Avisynth performs an unaligned splice, which should - according to the documentation - join the video and audio separately just as I described above. Once you have a master video like that, you can apply any of the workarounds.

In fact, you can add a speed adjustment command very easily to your AviSynth script, saving a step of the process. I will help you with that part (I've got scripts written already), if you can confirm that the joining works the way we need it to.

I apologize if what I just said makes no sense. I may be making this more complicated than it needs to be. Anyway, I just watched the video, and the sound seems to drift about 1 second in 3 minutes: too fast for 29.97/30.00, too slow for 44100/48000. Don't know...

that sounds confusing. i was hoping to find an easier way to fix the problem. i guess my computer just doesnt like fraps.

Do you think it would help if i uninstalled all of the ai suite, and if there anything else that i can tweek to help this situation

Okay, check my edit - I was apologizing for my ramblings!

I'm not sure what AI Suite is - I'm trying to Google it - it's some kind of overclocking tool, I guess? (EDIT - yes, that and more). You shouldn't have to uninstall it, if you can get all clocks back to original specification (maybe not all - start with the front side bus). If your unit came overclocked from the factory, you need to find the original, non-overclocked rate.

i did a clear cmos (which puts my system back to factory clocks) already

OK it seems AI Suite is doing some kind of automatic clock adjustment for power-saving or something. Maybe you do have to uninstall it if you can't disable that "feature".

ill try that

Ben, would you check this for me: is BCLK the same in your CMOS as it is in CPU-Z?



I think this may account for your sync problem (note in the forum posts below, the clock drift is about the same, percentage-wise, as your audio drift)

http://www.overclockers.com/forums/showthread.php?p=6994372

or, more precisely,

http://en.wikipedia.org/wiki/Spread_spectrum#Spread-spectrum_clock_signal_generation

The normal BCLK frequency is 100.0 MHz I believe - but more importantly, it should not be allowed to vary.

I highlighted the Spread Spectrum settings for CPU and PCIe in the above screen shot. Disable them.
(EDIT - I think the important one is PCIe, but not sure)

EPU happens to be on the same page; make sure that's disabled also.

...And keep your fingers crossed!

ok ill try it

YOU ARE A GENIUS. I RECORDED FOR 43 MINUTES AND NO DESYNC. YOU ARE A LIFE SAVER

Another one bites the dust!!

thanks for all of the help

Hi. New member here. I just wanted to make an account to thank raffriff for solving my audio sync problems. The solution that worked for me was disabling "spread spectrum" in the BIOS. Thanks again.