FCPX 2 camera shoot, audio 1/2 frame out of sync

We’re having trouble syncing audiop between two Panasonic HD cameras. We are both set to 1080i 30 fps but when we try to sync the video, we find that the audio from one camera is 1/2 a frame out of sync with the other camera. If it was a full frame, the fix would be pretty easy but we’re stumped by the 1/2 frame. So two questions:
1. Why is the audio 1/2 a frame out of sync?
2. Any suggestions for ways to fix this?

The first thing you need to check is the frequency of the audio. In FCPX, it should be 48KHz. How far off the sync is will be determined by the length of the clips.
If your audio is NOT 48K, you can try selecting the clip, detaching the audio (if it's not already separate from the video), select the audio and select Conform Speed from the speed from the Retime menu. Or you can manually retime the audio to match the video by setting markers on the video and audio separately, then Retime the audio with snapping turned on - it will snap immediately to your "sync points."

Similar Messages

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    Hello,
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    I'm capturing through a Canon Optura 50 Mini DV and editing with FCP 6.0.1. I have checked that the audio mode is set to 16 bit on the camera, and the capture settings have the audio rate for 48 KHz.
    This same problem occurred when I was capturing another event last week.
    PLEASE advise. It won't get aligned even if I take the hours and hours to move the audio left and right frame by frame.

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    Because the internal has more than enough to do running Mac OS X and the applications. It is constantly writing files. While DV video is at the lower end of the scale, it is still asking a lot of the drive's read and write head.
    I always used external drives, but we had many problems with delays and processing problems.
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    Welcome to Apple Discussions, m
    See if any of the suggestions offered here reduce your sync quality problem enough:
      http://discussions.apple.com/thread.jspa?messageID=7089133&#7089133
    If, after making certain that your Mac is running well, has plenty of free space on the correct drive, etc., your sync is still not close enough, you can manually re-sync any parts that are unacceptable to you using either QT Pro or iMovie.
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    I use the same simple process with either QT Pro or iMovie, so you can use whichever you find easiest. Whichever you use, keep the original AV clip safe and *_work on a copy_* in case something goes wrong.
    If you do not already know how, here is my process, but you can adjust for your workflow:
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    (2) Add the audio track copy to the AV file.
    (3) Silence the original audio and work on audio copy.
    (4) Insert small blank audio clips (or split and slide if using iMovie) if needed to make the audio later.
    (5) Cut small bits out of quiet parts (or split and shorten in iMovie) if needed to make audio sooner.
    (6) Repeat until satisfied and delete any tracks no longer needed.
    (7) Save the adjusted AV file.
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    At the very least, you should be using FireWire external drives. USB is no good for video as it delivers data in packets, not the sustained stream that video needs. The drives must also be formatted as Mac OS Extended. Windows FAT 16 of FAT 32 formatted drives have file size limits of 2 and 4 GB respectively. Anything larger is segemented and can cause problems on a Mac.

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    Message was edited by: stebianchi
    Message was edited by: stebianchi

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    Message was edited by: Lloyd Dexter

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    Welcome to Apple Discussions, m
    See if any of the suggestions offered here reduce your sync quality problem enough:
      http://discussions.apple.com/thread.jspa?messageID=7089133&#7089133
    If, after making certain that your Mac is running well, has plenty of free space on the correct drive, etc., your sync is still not close enough, you can manually re-sync any parts that are unacceptable to you using either QT Pro or iMovie.
    If you check carefully, you will see that not even pro video is always perfectly synced. It is a lot of work to get things "nearly perfect," but, with a bit of practice, it doesn't take long to get things "close enough" for me.
    I use the same simple process with either QT Pro or iMovie, so you can use whichever you find easiest. Whichever you use, keep the original AV clip safe and *_work on a copy_* in case something goes wrong.
    If you do not already know how, here is my process, but you can adjust for your workflow:
    (1) Copy of the audio track.
    (2) Add the audio track copy to the AV file.
    (3) Silence the original audio and work on audio copy.
    (4) Insert small blank audio clips (or split and slide if using iMovie) if needed to make the audio later.
    (5) Cut small bits out of quiet parts (or split and shorten in iMovie) if needed to make audio sooner.
    (6) Repeat until satisfied and delete any tracks no longer needed.
    (7) Save the adjusted AV file.
    (8) Enjoy!
    EZ Jim
    G5 DP 1.8GHz w/Mac OS X (10.5.7) PowerBook 1.67GHz (10.4.11)   iBookSE 366MHz (10.3.9)  External iSight

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