ColorBars node


This documentation is for version 1.0 of ColorBars.


Generate an image with SMPTE RP 219:2002 color bars.

The output of this plugin is broadcast-safe of “Output IRE” is unchecked. Be careful that colorbars are defined in a nonlinear colorspace. In order to get linear RGB, this plug-in should be combined with a transformation from the video space to linear.

See also:,_CheckerBoard,_ColorBars,_ColorWheel


Input Description Optional
Source   Yes


Parameter / script name Type Default Function
Extent / extent Choice Default
Extent (size and offset) of the output.
Format: Use a pre-defined image format.
Size: Use a specific extent (size and offset).
Project: Use the project extent (size and offset).
Default: Use the default extent (e.g. the source clip extent, if connected).
Center / recenter Button   Centers the region of definition to the input region of definition. If there is no input, then the region of definition is centered to the project window.
Reformat / reformat Boolean Off Set the output format to the given extent, except if the Bottom Left or Size parameters is animated.
Format / NatronParamFormatChoice Choice HD 1920x1080 The output format
Bottom Left / bottomLeft Double x: 0 y: 0 Coordinates of the bottom left corner of the size rectangle.
Size / size Double w: 1 h: 1 Width and height of the size rectangle.
Interactive Update / interactive Boolean Off If checked, update the parameter values during interaction with the image viewer, else update the values when pen is released.
Frame Range / frameRange Integer min: 1 max: 1 Time domain.
Output Components / outputComponents Choice RGBA Components in the output
Bar Intensity / barIntensity Double 75 Bar Intensity, in IRE unit.
Output IRE / outputIRE Boolean Off When checked, the output is scaled so that 0 is black, the max value is white, and the superblack (under the middle of the magenta bar) has a negative value.