HSV Keying

HSV Keying

Status:

Maintained

Keyframes:

Yes

Source library:

avfilter

Source filter:

hsvkey

Available:

On Master only:

No

Known bugs:

No

Description

This effect/filter turns a certain HSV range into transparency.

This filter measures color difference between set HSV color in options and ones measured in video stream. Depending on options, output colors can be changed to transparent by adding alpha channel.

Parameters

Parameter	Value	Description
Hue	Degrees	Set the hue value which will be used in color difference calculation. Allowed range is from -360.000 to 360.000. Default value is 0.000.
Saturation	Float	Set the saturation value which will be used in color difference calculation. Allowed range is from -1.000 to 1.000. Default value is 0.000.
Value	Float	Set the value which will be used in color difference calculation. Allowed range is from -1.000 to 1.000. Default value is 0.000.
Similarity	Percentage	Set similarity percentage with the key color. Allowed range is from 0.000% to 100.000%. Default value is 0.010. 0.001 matches only the exact key color, while 1.000 matches everything.
Blend	Percentage	Blend percentage. Allowed range is from 0.0% to 100.0%. Default value is 0.0%. 0.0% makes pixels either fully transparent or not transparent at all. Lower values result in more transparency, with a higher transparency the more similar the pixel’s color is to the key color.