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Didée · 25th March 2011, 15:34

It's rather obvious. The formula is laid out for black=0, white=255. But in YV12 with TV levels, it's black=16, white=235.

Replacing all "256" with "236 16 -", and all "x" or "y" with "x 16 -" and "y 16 -" respectively, should result in a correct screen formula for 16-235 TV scale.

Code:

236 16 - 236 16 - x 16 - - 236 16 - y 16 - - * 236 16 - / -

In your 2nd script line ... do you really expect mt_lutxy to reckognize the letters "U" and "L"?

25th March 2011, 15:34	#3 \| Link
Didée Registered User Join Date: Apr 2002 Location: Germany Posts: 5,391	It's rather obvious. The formula is laid out for black=0, white=255. But in YV12 with TV levels, it's black=16, white=235. Replacing all "256" with "236 16 -", and all "x" or "y" with "x 16 -" and "y 16 -" respectively, should result in a correct screen formula for 16-235 TV scale. Code: 236 16 - 236 16 - x 16 - - 236 16 - y 16 - - * 236 16 - / - In your 2nd script line ... do you really expect mt_lutxy to reckognize the letters "U" and "L"? __________________ - We´re at the beginning of the end of mankind´s childhood - My little flickr gallery. (Yes indeed, I do have hobbies other than digital video!)