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Audio faster than Video
I have a large Photo-Jpeg File (16 GB). When I view it with Quicktime A/V Sync is perfect. I used it in FCP and when I played my sequence in the canvas A/V Sync was perfect too. But when I got it on DVD, the audio gradually gets faster and faster until its off by over a minute at the end of the clip. My audio transitions are all in the correct place though, even on the DVD. When I view the clip in the viewer by double-clicking on the file in the browser the audio slippes too. Since the Audio is faster than the picture, FCP cuts the clips lenght short to match the sound. I’ve got the original file in 32000 khz, sequence and project as well. I’ve tried mixing down the sound, that didn’t help either.
Does anybody have an idea how his can happen?
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5 Replies
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I would export from Quicktime Pro, just the audio, and convert it to 16 bit 48kHz aif. Use that new file audio in your FCP timeline. This should fix the sync issue. If it dosen’t, we will need more information about your system, software used and configuation.
Hope this helps-
Matthew
Dual 500 G4
OSX 10.3.5
Ram 1.38
FCP 4.5/AE 6.5/DVDSP3 -
The problem is, that I’ve already finished the project. So I’d have to cut the exported audio in parts and match it with the picture in the timeline. The project being 1:36 hrs long, you can imagine how long THAT’s gonna take me. Any other ideas? Thank you very much for the help though!
My system:
G4 733 Mhz
640 MB RAM
250 GB Firewire
Benq 1620 DVD DL RW
Final Cut Pro 4.5 HD -
P.S. I’m running Tiger
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I didn’t realize you had edited the video too. I’m also assuming your time line is DV 720X480. Not sure if this would work but here goes. Export the audio like I said, then, import the audio and original jpeg video into a new FCP project, new time line, put your jpeg video and your new 48 khz audio together, export a reference movie (not self-contained) out of FCP and in the other project (make a copy first) replace the original (reconnect online) file with the updated reference file. I think this might work, never tried it this way. Since the files are the same length, your edit points should all line up. I replace backgrounds for different looks, for different shows all the time. Just make sure the files are exactly the same length.
Hope this helps-
Matthew
Dual 500 G4
OSX 10.3.5
Ram 1.38
FCP 4.5/AE 6.5/DVDSP3 -
Before I read your post I tried out exporting the project using Quicktime, not Compressor. The audio and video are in sync in the Quicktime file so I guess it’s a Compressor problem. Sorry, but I don’t have time to try out your solution, thank you very much for the help though!
Claas
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