Video Waveform Monitor

kdenlive2304_effects-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