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Audio Out of Sync After Rendering
I have a 10 minute video file that I recorded using my AverTV HD DVR. It’s an MPEG-2 1280×720 60 FPS.
When I play the raw file or the file in the Vegas Preview the audio is perfectly in sync.
When I go to render the file as a WMV or MP4 or even MPEG-2, the audio progressively goes out of sync to a point where it is 1-2 seconds off after 8-9 minutes.
I’ve never had this problem before, any help would be appreciated.
Raw file: https://i338.photobucket.com/albums/n401/xNickSwift/rawfile.png
Project properties: https://i338.photobucket.com/albums/n401/xNickSwift/projectproperties.png
Render settings: https://i338.photobucket.com/albums/n401/xNickSwift/render.png
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14 Replies
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Oh yeah, I’m running Vegas 9.0e 64 bit.
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Oh yeah, I’m running Vegas
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I don’t know anything about this card, but the reviews on Amazon are a really mixed bag
It certainly sounds like the problems encountered by recording audio at 44kHz rather than 48kHz. You get ‘audio drift’ a few minutes in… check the specs. If it’s recording at 44 you may be unable to fix it.
Alf
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I think I have an option to change how the audio is recorded.
https://i338.photobucket.com/albums/n401/xNickSwift/settings.png
Would changing these make it work?
I have a temporary fix. I used Any Video Converter to convert the MPEG to WMV. This made the audio fall about 1/2 ahead. Then when I rendered, Vegas made the audio fall back into place. This just makes an extra step, that I would prefer to avoid.
I also tried recording using VHCapture with a DivX 6.9.2 (4 logical cpu) codec, but when I import to vegas, only the audio appears. Anyone know how I would get the audio to appear in Vegas?
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I would try recording at 30fps and not 60fps since I assume you are recording from TV and TV is 30fps. There have been lots of audio sync problems with 60fps footage. 60fps recording should only be used for special slow motion effects.
~jr
http://www.johnrofrano.com
http://www.vasst.com -
I’m actually recording from the Xbox 360, which I think does 60 FPS. Whenever I record or render in 30 FPS I get a lot of motion blur.
I think the recorded footage is 60 FPS, should I render at 60.000 FPS or 59.940 FPS?
Would changing the audio around in recording/rendering do anything?
I got K-lite codec pack, and it made the video track appear in vegas, but the frames were all blurry. There were a few clear spots, but otherwise it was just awful.
I’ve tried recording using Huffyuv in VH Capture, but it uses something like 150 GB/hour, and I only have a 640 GB drive.
I haven’t yet tried rendering the file from huffy to see if it has out of sync audio.
I think I have three options right now.
1. Continue to record with AVerMedia center, and play around with the recording/rendering settings.
2. Use Fraps to record from AVermedia center. (This makes massive files too, and it splits them up.)
3. Use Huffy/MJPEG in VH Capture.
My setup works like this:
Xbox > HDMI Splitter cable > One direct to computer monitor / One direct to capture cardMy monitor is connected through DVI to my computer. My monitor has an audio out, so I was think I could capture video with AVer, but ignore the audio, run a cable from my monitor to my PC and use a sound program like Audacity to record the audio, then work at it myself to line them both up.
What I really want to know is where the problem is.
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Your TV is incapable of showing you anything faster than 29.970fps so even if the XBox is pumping out 60fps or 1000fps, your TV is only showing you 29.970. There is no reason to record faster than 29.970 so this is what I suggest you try.
Also the K-Lite codec pak will cause problems with Vegas can produce poor output quality. I would uninstall it and just install the codecs you need from the manufacturers that make them.
~jr
http://www.johnrofrano.com
http://www.vasst.com -
My monitor is 60 Hz, so I’m pretty sure it can do 60 FPS. Theres a significant difference between 30 and 60 FPS.
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I’ve determined it’s not the audio, its the video.
The audio track from the raw file and the audio track from the rendered file line up perfectly. It’s the video that’s out of sync after the render.
Any ideas what’s making this happen?
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