Cannot get audio/video to sync in VirtualDub capture?
I am struggling to get audio and video to sync when capturing VHS-C tapes on my rig using VirtualDub. On a 30 minute capture I have only 1 dropped frame, but the audio is about 1 to 2 seconds ahead of the video. I have followed many of the steps from this link:
http://www.digitalfaq.com/guides/vid...ped-frames.htm My capture drive is on a separate hard drive from operating system. I have antivirus turned off and Internet is not connected. When capturing the system is at about 20% of the CPU. My signal path is Panasonic AG-1970 -> AVT-8710 time base corrector -> Hauppauge USB-Live2 (both audio and video connected to the USB-Live2) It seemed to sync before I added the AVT-8710. On Virtualdub, I use Overlay and have turned off Audio Preview and Video Preview. I start the capture using F6. CPU: AMD Athlon 64 X2 3800+ 2.01 GHz Motherboard: MSI MS-7207G Memory: 3.5 GB PC3200 (200 Mhz) Graphics: NVIDIA GeForce 8400 GS 512 Mbytes Sound: M-Audio Audiophile 2496 Windows XP Home SP3 32 bit I do have a ATI All-In-Wonder 2006 256MB PCI Express Video Card coming soon. Maybe that will help. Anything else I can tweak? |
you could record the audio first then do a playback on another computer output you ill have to sync it up manually though might take a few tries to sync it up
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I'd advise johncan to find the setting for "adjust audio to sync with video" or "adjust video to sync with audio", or something like that. Look under "Capture" --> "timing" at the "Capture Timing Settings" window and tell us what audio settings are checked. |
The age of a system has nothing to do with audio/video sync. I was having zero sync issues in the 1990s. It's always been an issue of codecs, hardware, or drivers, or combination thereof.
M-Audio hardware is not known to be the best for maintaining constant sync. So that's one potential issue I see right away. Yes, M-Audio makes all sorts of nice high-end audio products, but the application is for audio only. When you add video to the mix, things change. I've noticed a trend lately, where more than 50% of the time, when a person has issues, they're using a MSI board. I used to think that board fine, but I'm now wondering about that. Is that one of the all-black AVT-8710 units, which is known to have flawed chipsets? I doubt it's causing audio issues, but in theory it could cause delay issues. Have you done a process of elimination, and tried with that TBC for the moment, to troubleshoot sync problems? SP3 can be part of the problem as well. Sync issues and dropped frames are a known problem of SP3. If used, you must disabled a lot of "security" junk that MS added to that SP. That was MS attempting to Vista-ize XP, and it screwed some things up in the process. That's why SP2 is always suggested. |
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X Drop frames X Insert null frames _ Null frame burst rate Resync Mode _ Do not resync between audio & video _ Sync video to audio X Sync audio to video _ Correct video timing _ Automatically disable resync when integrated audio/video capture Auto latency determination X Automatic Number of audio block: 30 _ Fixed Direct Show X Use audio timestamps _ Disable timestamps _ Force audio clock _ Ignore video timestamps Quote:
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Thanks for all the advice. I will keep learning, reading, and tweaking. |
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