Expression

Understanding expressions requires some programming skills. NodeVideo uses MiniScript as the built-in programming language, You can refer to its Quick Reference or User's Manual to learn.

Of course, it doesn’t matter if you don’t know how to program. Please refer to the Expression Examples and copy codes for your needs.

Global Variables

Name	Explanation	Type
time	The current time of this layer	Number
name	The name of this parameter	String
value	The current value of this paramater	Number, [,], [,,]
frameDuration	One frame time, equivalent to 1/FPS	Number
speed	The speed of change of the current parameter	Number
velocity	The velocity of change of the current parameter	Number, [,], [,,]
numKeys	The number of keyframes the current parameter contains	Number
numLayers	The number of layers the current group contains	Number
index	The index of this layer under the parent group	Number

View Variables

All the above variables can be viewed through the expression: "print variable".

Global Objects

thisLayer

Name	Explanation	Type
name	The name of this layer	String
index	The index of this layer	Number
startTime	The current time of this layer	Number
is3D	Is this layer in 3D mode	Number
position	Position	2D[,], 3D[,,]
scale	Scale	2D[,], 3D[,,]
pivot	Pivot	2D[,], 3D[,,]
rotation	Rotation	2D[Number], 3D[,,]
opacity	Opacity	Number
parent	Parent group	Same as thisLayer

Built-in Functions

Name	Explanation	Parameters
wiggle	Wiggle effect Same as Wiggle Editor	-frequency -amplitude -octaves(default 1) -amp_mult(default 0.5) -time(default is current time)
smooth	Sample the current parameter and take the average	-width(default 0.1) -samples(default 5) -time(default is current time)
posterizeTime	Set the update frequency of the expression	-updatesPerSecond
key	Get keyframes	-index
nearestKey	Get the keyframe closest to the current time	-time(default is current time)
seedRandom	Set random number seed	-seed -timeless(default is false)
random	Get a random number	-min -max
noise	Get a smooth noise	-number
loopIn	Cycle forward from the first keyframe	-type --“cycle” --“pingpong” --“continue” -numKeyframes
loopOut	Cycle backward from the last keyframe	-type --“cycle” --“pingpong” --“continue” -numKeyframes
loopInDuration	Same as LoopIn, but can set loop duration	-type(same as LoopIn) -duration
loopOutDuration	Same as LoopOut, but can set loop duration	-type(same as LoopOut) -duration
timeToTimecode	Convert time to timecode [00:00:00:00]	-time(default is current time) -timecodeBase(default 30) -isDuration(default false)
timeToFrames	Convert time to frames	-time(default is current time) -fps(default project fps) -isDuration(default false)
framesToTime	Convert frames to time	-frames -fps(default project fps)
velocityAtTime	The velocity of change of the current parameter	-time(default is current time)
speedAtTime	The speed of change of the current parameter	-time(default is current time)
valueAtTime	The value of the current parameter	-time(default is current time)
linear	Linear interpolation	-t[0-1] -value1 -value2
ease	Smooth interpolation, tangent at both ends is 0	-t[0-1] -value1 -value2
easeIn	Smooth interpolation, tangent at start is 0	-t[0-1] -value1 -value2
easeOut	Smooth interpolation, tangent at end is 0	-t[0-1] -value1 -value2
rgbToHsl	Convert RGB to HSL	-rgbaArray
hslToRgb	Convert HSL to RGB	-hslaArray
toFixed	Returns the value as a string, specifying the number of decimal places	-number -places(default 2)）
layer	Returns specify layer	-index -isRelative(default true)

Math Functions

-	-	-
abs(x)	acos(x)	asin(x)
atan(y,x)	ceil(x)	cos(r)
sin(r)	floor(x)	log(x,b)
round(x,d)	pi	sign(x)
sqrt(x)	tan(r)	exp(f)
pow(f,p)	clamp(v,min,max)	length(v)
normalize(v)