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-   -   How to remove VCR noise from bottom of screen? (http://www.digitalfaq.com/archives/capture/3108-how-remove-vcr.html)

Icarus3000 03-28-2003 11:56 AM

How to remove VCR noise from bottom of screen?
 
I am capturing old VHS-C home movies through an Analog-DV converter, and encoding to KVCD.

At the bottom of the screen on the capture there is ~ 20 lines of distortion.

I was wondering what is the most efficient way of cropping out the bottom 20 lines? I know I can do:

letterbox()

but if I do that at the beginning of my script, I end up filtering black lines for no reason, and if I do it at the end of my script, I end up filtering lines that I will later be removing!

What about cropbottom()? Is that better to use in this case? And if so, where in my script should I include this command.

Many thanks,
Icarus

Bytecode 03-28-2003 12:11 PM

Crop(0,0,0,-20)

Crop(LEFT,TOP,RIGHT,BOTTOM)

And I would do it first thing after loading my movie. There is no point doing any processing on a piece of the film that won't be encoded. ;p


Hope this helps.

-BC

Icarus3000 03-28-2003 12:52 PM

Thanks Bytecode!

Will try that when I get home tonight.

el_mero_zooter 03-28-2003 12:56 PM

I3000,

if i understand you correctly all you want to do is remove the (scan) lines, white noise from the bottom. Usually it's all the extra crapazoids that you'd get from vhs captures.
If so, I usually clean up about 7 or 8 lines depending on the type of capture and how dirty it appears.

I use the following comment in my vhs avs scripts

Cropbottom(7)


{6, or 7 or 8 depending on how many lines the capture needs}



Zooter

Valky 04-01-2003 12:29 AM

and also many captureprograms like VirtualVCR and Virtualdub can do this while you capture, so you might save some extra frames if there otherwise could have been some dropped frames during bad signal.


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