Really odd problem - Noise Reduction

wcoxe1 wrote on 9/20/2002, 7:23 PM

I have been editing on this machine for weeks without a dropped frame or a stutter. But today I tried to knock a little A/C noise out of my sound track and the strangest thing happened.

At first I thought that the track was simply stuttering from missing a frame here and there. But such was not the case.

I LOOKed at the time line, at the moving bar crossing the timeline, and it was jumping. Backwards and forwards, as much as 3 and possibly 4 frames backwards. This was a measureable distance, since I expanded the line so that it was about 8 frames wide, and it was jumping back about half the width of the timeline.

The matter was even odder when I started investigating. When I stopped the playback, backed up a few frames before the stuttering began and started again, it did NOT stutter. However, within about 10 seconds, further down the line, it began stuttering again, jumping forward and backward.

Every time I replayed a bad section, it was fine, but another section popped up after I let it play for a while.

These are the ONLY problems I have had like this since I first got my machine set up properly quite a while ago. Nothing has been changed to my knowledge, and all other operations seem OK on other projects which do not use Noise Reduction.

Any ideas?

Comments

Spot|DSE wrote on 9/21/2002, 10:31 PM

are you using Noise Redux as a plug in/realtime, or have you applied it as a destructive file? If it's running as a plug, then it could cause this chop, because the processor is being hit too hard.

wcoxe1 wrote on 9/21/2002, 11:23 PM

Thanks for answering.

It is a plug in, which is what the instructions posted in the knowledge base tells the user to do.

The next question is, is this something that will smooth out with rendering, or stay unreliable?

Spot|DSE wrote on 9/22/2002, 10:49 AM

It will smooth out at render, but you'd be best off doing this as a take, by opening the clip in Forge, and then saving the audio the way that Forge will save it, and replacing the clip in Vegas. Forge will replace the clip in Vegas automatically. Do this by right clicking the audio you want to run the filter on. Select Open Copy in Forge.
Edit the clip in Forge. DON'T SELECT SAVE.
When you close the clip, it will ask if you want to save the clip/edits. Select YES.
Forge will close, and when Vegas becomes the focused app, you'll note the audio clip is called "XXXtake2.wav. This is the replaced clip. It didn't change the original audio that is part of the avi, it merely replaced it. The original audio is still there if you want/need it back. Doing the noise reduction this way will remove the hit on your processor.
Noise Reduction IS a plug in. But there are intelligent ways to use plugs and unintelligent ways to use plugs. Running a Noise reduction plugin as a real time plug simply isn't very efficient, whether it's a SOFO noise redux, a WAVES noise redux, Dart, or General Dynamics. Work smarter, not harder.

wcoxe1 wrote on 9/22/2002, 4:44 PM

Thanks for the info. I had very little instruction, and had a very hard time getting it to work at all until after a few months I convinced SF that their instructions for using Noise Reduction was completely (a year) out of date for VV3.

They re-wrote the entry in the knowledge base, but didn't mention anything about what you suggested. It sounds like a very smart way to proceed. Indeed, work smart, with a little help from our friends.

How about contributing your suggestion to the knowledge base? It NEEDs more on NR, obviously.

Thanks