Audio falls out of sync in Final Cut Pro X

[T. Payton]

Bummer. So what if you open the .mov in QuickTime Player. Is it still out of sync?

——
T. Payton
OneCreative, Albuquerque

[Bill Sandifer]

Just did so to make sure. I’ve repeated all this so often I begin to doubt what I remember. The original media I just opened in QT is in sync. I may give it another go rendering in FCPX tomorrow to see what happens. What’s more maddening is most of what I see on YouTube is also out of sync. I found a Google discussion group where a workaround was issued to try to correct that. Seems if it’s not one thing, it’s another. Thanks for the response. I remember when a quick tug on the film guide in my CP-16 ensured the correct frame count between shutter and audio record head was all it took. Analog video from my trusty Betacam never failed. It’s a brave new world, and I’m a tired old fart.

[Bill Sandifer]

Decided to take a chance and buy FCPX. Trial was .1; this is .3. Let it update, imported files done under .1, and rerendered a 4-minute performance. If not right on, it was within a frame or two. Wouldn’t upload to Vimeo (said file was too big at 375mb?), so I put it through Compressor, ending with audio/video out of sync by more than two seconds. Tried it without Compressor, and it’s still about two seconds off, consistently from beginning to end. While the trial gave me no dialog boxes, .3 suggested I upgrade my video card, but performs identically to .1 otherwise. I’m no computer architect, but I’m fairly sure a marginal video card wouldn’t wreck the sync, particularly since I got one correct sync the first time. I’m beginning to think I’m jinxed. I sure would appreciate it if someone could help me sort this out. I began looking at a PC today and had to give myself a dopeslap.

[Bill Sandifer]

My sync problem appears to have broadened. I loaded an .mov file from my Nikon P7000 last night. Played fine, all in sync. I trimmed it, no editing, saved it from QT 10.0 as an H.264, 5 mbits files, HD720p, and no editing. It’s badly out of sync. (time-snip) All right, this may help somebody who’s a Mac architect tell me what to do. I just played the original, unaltered file on QT, and it’s way out of sync now. Tried VLC, the same.This is beginning to sound more like a computer problem. Does anyone have any suggestions short of buying a new iMac? This is what I have, and it has never appeared to struggle with either iMovie or FCPX.

Model Name: iMac
Model Identifier: iMac5,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2.33 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 4 MB
Memory: 3 GB
Bus Speed: 667 MHz
Boot ROM Version: IM51.0090.B09
SMC Version (system): 1.9f4
Serial Number (system): QP6490J4VUW
Hardware UUID: 00000000-0000-1000-8000-0017F2C48233

[Bill Sandifer]

For those who’ve been kind enough to try to help with audio/video sync problems, I just had an eye-opening experience. I got my wife to check out a Vimeo clip I uploaded last night … and it’s perfectly in sync playing back on her PC. It’s wildly out of sync on my iMac. Is it possible a marginal video card can wreak such havoc? If anyone is having a similar problem and wants to check out the clip for sync playing on your machine, try https://vimeo.com/37158320 Thanks, Bill

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[Geoff Dills]

Plays fine on my iPad.

Best,
Geoff

[T. Payton]

I would give Apple a call if you haven’t already, this sounds like something up their ally.

——
T. Payton
OneCreative, Albuquerque

[Alex Schmitt]

Long time lurker, first time poster, but wanted to contribute;

Although this thread is quite old, i just had the same problem, audio was out of sync when playing back from the beginning of the time line, but was fine if you started playback further into the time line

A fix that has worked for me, is to trim the first 5 seconds of the audio clip going out of sync, i’m guessing you could pop in the first 5 seconds afterwards using the same clip (blade tool @ 5 seconds didn’t work)

Hope this helps 😉