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Audio drifts out of sync during playback in timeline
I have read quite a few posts but haven’t found one that addresses my problem exactly. I am running FCP 4.5 I have not updated to Quicktime 7 yet so I am running Quictime Pro 6.5.2 I am on a G5 Dual 2.5MHz with 6.5 gigs of memory. I have lots of firewire drives attached to the system and the files I am working with are on those drives. This is the problem. I’m putting together a little montage and pulling in both video and still photos as well as music. I am working at 16bit 48K. All the video has come in via DVD’s The DVD’s were made by recording them on a Pioneer DVR-7000 recorder. They were then made into movies with a program called “Cinematize”. These are the video files I am working with. I have an Aurora Igniter X installed on this MAC for playback.
Problem is: the audio is drfiting away from the video as I play back my material. When these DVD’s are played they are perfect. When the Quicktime movies are played, they are perfect. It’s only after i put them in the timeline that the problem occurs. I’m not talking about anything except literally playing a 30 to 40 second cut from a longer (as much as 55 minutes) movie file. The audio sometimes plays fine and always begins in sync. It drifts as the file plays. If i stop the file for a moment and start it again it is in perfect syn from that point and then begins to drift again. I haven’t even tried to output it yet, this is all playback.
I have checked the settings and they all seem to say 48K and are 16 bit.Any ideas? Help! Thanks.
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2 Replies
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You might try this.
Couldn’t hurt:There is a function in FCP that is often overlooked… and it can help with many audio and video “skipping”, “sticking” and “missing” problems.
You should “Mixdown” the Audio for playback before you dub out of FCP, or during the edit, if you have audio/video stuttering, drop-outs or freezes.
NOTE: Mixdown has even been demonstrated to help with slipping, skipping problems (or “missing” audio clips) for files being EXPORTED as QT (or similar) files out of FCP.
First, SELECT ALL of your audio tracks (highlight them) on the timeline, then:
Sequence Menu > Render Only > Mixdown.
You should see a dialog box telling you its rendering.
It might seem to make little sense that “Mixing down” even simple audio tracks will “fix” complex video “freezes” or random audio dropouts to tape or export, but it CAN.
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Also… you’re playing from 7200 rpm drives…. LONG FILES (15- 20 minutes or more )chained on muliple drives will lose playback synce (not real sync..only in playback) when you work this way. When you stop the playback, it starts in sync again.
It’s just too much much work to play all that at exactly the same time with those setups.
As mentioned… AUDIO MIXDOWN will render the mulple tracks (if there are any) into a contanstant file that will playback smoother because it isn’t searching through multiple drives and chains to load the files.
Mike
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