Cleaning 'noise' from recorded video

dcomo wrote on 4/27/2003, 10:19 PM

I was given a SVHS tape that contained a commercial that I needed
to convert to MPEG-2 format. When I ran it though my workstation,
I found that I had a small line of digital noise at the bottom of
the video. (This also appeared in the original format.)

Is there a way to crop this out and then stretch the video, or any
scrubbing utilities that will clean this?

Thanks in advance!! :-)

Comments

BillyBoy wrote on 4/27/2003, 10:24 PM

Open in Vegas, click on pan/crop button at right edge at end of video, click on corner handle in the FX workspace, while holding down left mouse drag in towards center and you'll see video zoom in. Click on first keyframe when you're happy with result. Play all the way through to be sure it gets it all.

mikkie wrote on 4/28/2003, 8:48 AM

One thing you might try, sometimes get better results by having the encoder do the enlarging. Do the cropping, but set your project to the reduced frame size rather then resizing to orig.

Depends on the encoder and the source, but when or while the encoder is figuring out what parts of the frame to save and compressing it, it deals with the unaltered source image, so you have zero chance of anything being introduced in the way of artifacts etc. Any time you enlarge an image, there is no way to do it with 100% accuracy as the software has to guess which pixels at which color to add.

The encoded and compressed video isn't a pixel for pixel representation of the original in any case, being somewhat akin to instructions for the player on how to display the picture properly. You're not analyzing the video twice, once to enlarge and once to compress. And when/where calculations are done to add pixels, there are relatively fewer of them as mpg2 is lossy, tosses some of the original data out.

might want to give it a try...
mike

dcomo wrote on 4/29/2003, 9:50 PM

Thanks for the advice. I'll try the suggestions!