Composition Blend Modes

For Kdenlive, some composition types are basically blending modes (see there for a detailed description).

Changing the composition Blend Mode

You can change the Blend Mode by selecting from the Composition Type drop-down list.

The following table below lists the composition types and their blending mode counterpart in Composition Type Cairo Blend:

Composition Type	Example	Blending Mode
Addition / addition_alpha		Add Perform an RGB[A] addition or addition_alpha operation of the pixel sources (frei0r.addition and frei0r.addition_alpha, respectively)
Burn		Color Burn Perform an RGB[A] dodge operation between the pixel sources[1] (frei0r.burn)
Color Only		No equivalent Perform a conversion to color only of the source input 1 using the hue and saturation values of input 2 (frei0r.color_only)
Darken		Darken Perform a darken operation between two sources (minimum value for both sources) (frei0r.darken)
Difference		Difference Perform an RGB[A] difference operation between the pixel sources. (frei0r.difference)
Divide		No equivalent Perform an RGB[A] divide operation between the pixel sources[2] (frei0r.divide)
Dodge		Color Dodge Perform an RGB[A] dodge operation between the pixel sources[3] (frei0r.dodge)
Grain Extract		No equivalent Perform an RGB[A] grain-extract operation between the pixel sources (frei0r.grain_extract)
Grain Merge		No equivalent Perform an RGB[A] grain-merge operation between the pixel sources (frei0r.grain_merge)
Hardlight		Hard light Perform an RGB[A] hardlight operation between the pixel sources (frei0r.hardlight)
Hue		HSL hue Perform a conversion to hue only of the source input1 using the hue of input2 (frei0r.hue)
Lighten		Lighten Perform a lighten operation between two sources (maximum value of both sources) (frei0r.lighten)
Multiply		Multiply Perform an RGB[A] multiply operation between the pixel sources (frei0r.multiply)
Overlay		Overlay Perform an RGB[A] overlay operation between the pixel sources[4] (frei0r.overlay)
Saturation		HSL saturation Perform a conversion to saturation only of the source input1 using the saturation level of input2 (frei0r.saturation)
Screen		Screen Perform an RGB[A] screen operation between the pixel sources[5] effectively using black as the alpha channel (frei0r.screen)
Softlight		Soft light Perform an RGB[A] softlight operation between the pixel sources (frei0r.softlight)
Subtract		No equivalent Perform an RGB[A] subtract operation of the pixel source input2 from input1 (frei0r.subtract)

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[1]

It uses the generalized algorithm: D = saturation of 255 or depletion of 0, of ((255-A)*256) / (b+1)

[2]

Input 1 is the numerator, input 2 the denominator

[3]

It uses the generalized algorithm: D = saturation of 255 or (A*256)/(256-B)

[4]

It uses using the generalized algorithm: D = A * (B + (2 * B) * (255 - A))

[5]

It uses using the generalized algorithm: D = 255 - (255 - A) * (255 - B)