Im a newb at avs scripts,but have been spending a little less than a week,and several hours a day to try and understand,have been getting burned out by all i have been reading,but wont give up.

My question is this,if anyone can please help me, What is the Legalclip command in the beginning and end of the optimal script?

A unneeded bullcrap


Officialy this command is to limit the luma into the range [16-250] because it is the defined range in the IEEE standard that all TV set based on cathodic bulb have to follow. In other words, a luma that is not clipped to 16-250 can lead to a distorted picture on your TV, and would even damage the set !

This is theory.

Now : all new TV set support full luma range since, let say, 5 years ? AND all the encoders that we use (tmpgenc, MCE, CCE) clip the luma to 16-250 themselves by default !
So there is absolutly no need to do that in the script and this is just lack of time.

....and from Sh0dan signature's link:
http://cultact-server.novi.dk/kpo/avisynth/avs_cvs.html

- Added "pc_range=true/false" parameter to overlay.
This will make all RGB<->YUV conversions inside Overlay
assume [0->255] YUV range, and not CCIR 601 [16->235] range.
Default is false.

I finally edited the optimal script page
Removed LegalClip and Limiter() from the scripts.

-kwag

Thanks very much for the response everyone,had been wondering about that statement. I believe im finally starting to understand Aviscripting,slow but sure