-
Sound sync issues FCP / iMac
Hello,
I have shot a short film with about 15 hours of rushes. I was using the 5D with independent sound, synced afterwards with Pluraleyes.
The problem is that there is definitely a lag between the audio and the image on the original .mov files when played out through FCP on my computer. On my FSI Grade 1 monitor, they are closer together-maybe 1 or 2 frames out, sometimes. (There is a recently noted lag with the 5D and it’s audio tracks – in camera, may be due to a recent camera firmware issue) Connection to the monitor is HD-SDI through Matrox MXO.The problem is that I find my FSI monitor does not have very good / loud enough sound. I would like to be able to use my computer occasionally, especially for simple operations like syncing. I also fear that even through the FSI monitor, this lag is actually being generated by the Mac itself, but can’t be sure. I certainly don’t want to be correcting an issue that isn’t there in reality.
Does anyone know why this happening on my iMac with FCP? Is it merely an issue of not having enough processing power? Is their some settings which need to be changed? Really I have no other apps open, with everything dedicated to FCP when I am using it. What’s going on that I would have up to as much as 9 frames of lag when viewed solely on the computer?
-
4 Replies
-
This has come up many times with the FSI monitors. There is a FSI forum here too.
But try the settings on the monitor to fast or normal or something for the audio signal. There is also an “offset” audio setting in FCP.
Running Imac computer audio out will be different then audio and video out an I/O card to proper monitoring of both.
Chris Tompkins
Video Atlanta LLC -
The easiest answer to this would be to export a segment of your synced audio as a self-contained QT movie and see if the audio is synced correctly. If it is, then you’ll just have to have faith while you’re editing. If not, THEN you can hunt down the problem.
—
Exploring the pitfalls of the 5D workflow. The many, many pitfalls… -
There is a 1/8″ jack on the back of the FSI monitor. Run this to an amp and use it to monitor with. That audio jack is set to adjust for any delay.
Lee
SAMDOG Digital Post
Calgary, Alberta
Mac Pro 2.66 12-core 16gb ram • FSI LM1760W Monitor • Matrox MX02 • Caldigit HD One 8tb Raid • Euphonix MC Transport • Final Cut Studio 3 • Premiere Pro CS5 -
Yeah, that’s funny because I just plugged a headphone set in earlier today, and the sound is a whole other universe than what’s coming from those speakers…
Reply to this Discussion! Login or Sign Up