MaskTools2/Mt invert

Revision as of 16:54, 23 November 2013

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Description

Inverts the values of the pixels. This function is equivalent to mt_lut("255 x -"), but faster.

Syntax and Parameters

mt_invert(clip, int "Y", int "U", int"V", string "chroma", int "offX", int "offY", int "w" int "h")

Y int = 3

U int = 1

V int = 1

These three values describe the actual processing mode that is to be used on each plane / channel. Here is how the modes are coded :

• x = -255...0 : all the pixels of the plane will be set to -x.
• x = 1 : the plane will not be processed. That means the content of the plane after the filter is pure garbage.
• x = 2 : the plane of the first input clip will be copied.
• x = 3 : the plane will be processed with the processing the filter is designed to do.
• x = 4 (when applicable) : the plane of the second input clip will be copied.
• x = 5 (when applicable) : the plane of the third input clip will be copied.

chroma string = ""

When defined, the value contained in this string will overwrite the u & v processing modes.

This is a nice addition proposed by mg262 that makes the filter more user friendly. Allowed values for chroma are:

• "process" : set u = v = 3.
• "copy" or "copy first" : set u = v = 2.
• "copy second" : set u = v = 4.
• "copy third" : set u = v = 5.
• "xxx", where xxx is a number : set u = v = -xxx.

offX int = 0

offY int = 0

"offx" and offy are the top left coordinates of the box where the actual processing shall occur. Everything outside that box will be garbage.

w int = -1

h int = -1

w and h are the width and height of the processed box. -1 means that the box extends to the lower right corner of the video. That also means that default settings are meant to process the whole picture.

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