Video Waveform Monitor¶

Description

This effect/filter plots color component intensity. By default luminance only. Each column of the waveform corresponds to a column of pixels in the source video.

Parameters

Parameter	Value	Description
Mode	Selection	Select the orientation of the waveform
Intensity	Float	Set intensity. Smaller values are useful to find out how many values of the same luminance are distributed across input rows/columns. Default value is 0.04. Allowed range is [0, 1].
Mirror	Switch	Set mirroring mode. In mirrored mode, higher values will be represented on the left side for row mode and at the top for column mode. Default is Off.
Display	Selection	Set display mode
Components	Integer	Set which color components to display. Numerical values represent different planes (see below).
Envelope	Selection	Set envelope
Filter	Selection	Set the filter to apply
Graticule	Selection	Select which graticule to display
Graticule Opacity	Float	Set graticule opacity
Flags	Selection	Set graticule flags
Scale	Selection	Set scale used for displaying graticule
Background Opacity	Float	Set background opacity

The following selections are available:

Mode

Row	Graph on the left side represents color component value 0 and the right side represents value = 255
Column	Top side represents color component value = 0 and bottom side represents value = 255.

Display

Value	Description
overlay	Presents information identical to parade, except that the graphs representing color components are superimposed directly over one another. This display mode makes it easier to spot relative differences or similarities in overlapping areas of the color components that are supposed to be identical, such as neutral whites, grays, or blacks.
stack (default)	Display separate graph for the color components side by side in row mode or one below the other in column mode.
parade	Display separate graph for the color components side by side in column mode or one below the other in row mode. Using this display mode makes it easy to spot color casts in the highlights and shadows of an image, by comparing the contours of the top and the bottom graphs of each waveform. Since whites, grays, and blacks are characterized by exactly equal amounts of red, green, and blue, neutral areas of the picture should display three waveforms of roughly equal width/height. If not, the correction is easy to perform by making level adjustments to the three waveforms.

Components

Value	Description
1 (default)	Y (luma or luminance)
2	U (blue minus luma)
3	YU
4	V (red minus luma)
5	YV
6	UV
7	YUV

Envelope

Value	Description
none (default)	No envelope
instant	Instant envelope, minimum and maximum values presented in graph will be easily visible even with small step value.
peak	Hold minimum and maximum values presented in graph across time. This way you can still spot out of range values without constantly looking at waveforms.
peak+instant	Peak and instant envelope combined together

Filter

Value	Description
lowpass (default)	No filtering
flat	Luma and chroma combined together
aflat	Similar as above, but shows difference between blue and red chroma.
xflat	Similar as above, but use different colors.
yflat	Similar as above, but again with different colors.
chroma	Displays only chroma
color	Displays actual color value on waveform
acolor	Similar as above, but with luma showing frequency of chroma values.

Graticule

Value	Description
none (default)	Do not display graticule
green	Display green graticule showing legal broadcast ranges
orange	Display orange graticule showing legal broadcast ranges
invert	Display invert graticule showing legal broadcast ranges

Flags

Value	Description
numbers (default)	Draw numbers above lines
dots	Draw dots instead of lines

Scale

Value	Description
digital (default)
millivolts
ire