how to use virtualDUB 6 replies

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crisissuit3

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17th August 2007

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#1 10 years ago

ok, so i recently downloaded the virtualDUB program to compress my recorded Call of duty 4 files because the sound kept playing ahead of the video. i got it and looked up 2 tutorials and the only thing they did was make my video blurry. any help?




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Modern Warfare

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1st January 2005

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#2 10 years ago

I've used VirtualDub a lot with both Game Cam and Fraps captures. In fact I've used it to sync audio to video but it's much easier to do that when the out of sync is a constant rate off rather than progressively worse. First I think we should try and find out what's causing your out of sync problem during the capture process unless you're dead set on using an already captured clip that has this problem. To sync the audio to video you need to use the Audio>Interleaving (Ctrl+I) feature, which has details on how to use it once you get to it's control panel.

If the sync is progressively worse however, you either need to use interleaving on several small clips, or use the Avisynth plugin for VDub, the latter of which is fairly complex and time consuming as it's a frame by frame process. To help try and solve any out of sync problems before capture, make sure you have the latest drivers for your GPU and sound device (whether onboard or not) and keep your HD defragged and background programs off while capturing. It also helps to have the captured file saved to a secondary HD rather than the primary OS drive if possible, just make sure there's ample space on it. A common cause of out of sync audio though is capturing extremely long clips. If you think that may be the cause, just record shorter clips and splice them together.

You also need adequate hardware to capture uncompressed with Fraps, esp if the game is rather resource intense. There are other things that can factor in too though, like the type of audio device you have. Also make sure you use the latest version of the capture program. I had bad out of sync problems with Fraps using my onboard Realtek AC/97 sound for some time (my sound card won't record software sources). Then suddenly at one point it started recording in sync. I assume it had something to do with a driver update for AC/97 and/or a Fraps update.

When it comes to compression, I don't use anything but Xvid. It's superior image quality and low file size are the main reasons why I stopped using WMV via Windows Movie Maker to compress with. You need to know how to configure Xvid though. There's a fairly good tutorial for it on Doom9, or I can go through the settings step by step and tell you how I set it up. Once configured properly, you can get high quality compressions that will zoom from 640x400 to 1280x800 with barely any noticeable loss in image quality. Getting results that good involves making a couple fairly time consuming twopass compressions though.




crisissuit3

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#3 10 years ago

well, this took awhile to reply. but ok. your info seemed very wide so let me try to narrow what im talking about since i wasnt really specific. the audio has always been dysynced even with the hard drive defragged, i put it on my other hard drive which has enough room to fit 50 games, and the only background program is fraps itself. the desyncing progressivly gets worst, and as for audio device. i honostly dont know.




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Modern Warfare

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#4 10 years ago

Are you using onboard audio? If so do you have the latest driver for it and the latest build version of Fraps? Also, how robust parts wise is your system in general and how long a clip is it? Unless you are insistent on using a capture you already have, I would seriously consider trying to solve the out of sync problem and try and make another one that's in sync.

The only way you're going to be able to sync it without something complex like Avisynth is cutting it up into small 20-30 second clips and syncing each one separately with a different ms value for the offset, then rejoining them, which may or may not have good results. I've done that before on a short 5 minute HL2 video I made. The results were satisfactory, though I can't say I'd want to use that method very often or on long clips.

It's rather tedious work and the more loud audio going on the harder to pull off smoothly. You have to be very careful where you separate the segments. Trying to find quite spots to make the cuts and adding background music as a finishing touch can greatly improve your chance of success.




crisissuit3

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#5 10 years ago

i have the 2.9.4 version of Fraps, my system is composed of a 7600 gtx, 1 gig of ram, and 2.11 GHz. and im not sure on how to check my driver. and cutting clips is a little hard because, it is gradual but it takes about 5 to 10 seconds for the sound to unsync.




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Modern Warfare

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#6 10 years ago

The latest version of Fraps is 2.9.5. Your system spec is not exactly ideal for capture, you may want to consider a capture program that uses compression like Game Cam, which is less resource hungry. You still haven't mentioned what audio device you have. Since you say you don't know how to check your driver, I'll assume it's onboard. If you have no sound card, what is your brand and model of MB?

On the sync, if you mean it takes 5-10 seconds from the start of the video before the sound goes out of sync, just make the first cut after that point. The trick is to cut short segments and look for quiet spots to cut them if you can, like I said previously.




crisissuit3

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#7 10 years ago

ill try and update fraps, to see if that helps. i never had any problems with it before so, ill just try it. where can i find 2.9.5?