Audio Drift 44.1K & 48K

pgfitzgerald wrote on 4/13/2003, 5:57 PM
I've got video and audio from a camcorder (16bit 48k) and audio from a mixer (16bit 44.1k) that I'm trying to sync. Everything is great at the beginning, but after about an hour things are off just enough to sound really weird. It's probably only a few milliseconds.

I tried converting the 44.1k audio to 48k, but that didn't solve the problem. Does anyone have any tips, techniques, or procedures for a situation like this? Or am I just screwed? :-)

Thanks,

Paul G. Fitzgerald

Comments

shawnm wrote on 4/13/2003, 7:35 PM
Hey Paul,

This shouldn't be a show stopper. If you can find a section in the video where there are a few milliseconds of silence (right before the sync problems start), select your clip (audio and video), press "U" (to ungroup audio and video), select your audio clip by left clicking it, then press "S" to split the clip. After that, select the audio clip to the *right* of your edit point, "grab" the beginning of that clip and trim it a few milliseconds. From there you should be able to adjust your audio until it comes back into sync. If this isn't clear, let me know and I can post a screen grab of the procedure for you.

Thanks,

Shawn
pgfitzgerald wrote on 4/13/2003, 8:53 PM
That worked just fine... I was just hoping there was a "better" way of doing it.

Thanks,

Paul G. Fitzgerald
SonyDennis wrote on 4/13/2003, 10:05 PM
You could Ctrl+drag the end of the offending clip to the right length, and then bring up the Event Properties on it and set "Time stretch / pitch shift" to "change length and pitch".

Some people might argue for "change length, preserve pitch" mode, but if it's not the right length, the pitch is also off by definition because the device's clock was off.

///d@