Video waveform monitor.
The waveform monitor plots color component intensity. By default luminance only. Each column of the waveform corresponds to a column of pixels in the source video.
It accepts the following options:
- mode, m
-
Can be either
row
, orcolumn
. Default iscolumn
. In row mode, the graph on the left side represents color component value 0 and the right side represents value = 255. In column mode, the top side represents color component value = 0 and bottom side represents value = 255. - intensity, i
-
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, r
-
Set mirroring mode.
0
means unmirrored,1
means mirrored. In mirrored mode, higher values will be represented on the left side forrow
mode and at the top forcolumn
mode. Default is1
(mirrored). - display, d
-
Set display mode. It accepts the following values:
- overlay
-
Presents information identical to that in the
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.
- parade
-
Display separate graph for the color components side by side in
row
mode or one below the other incolumn
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 the three waveforms.
Default is
parade
. - components, c
-
Set which color components to display. Default is 1, which means only luminance or red color component if input is in RGB colorspace. If is set for example to 7 it will display all 3 (if) available color components.
- envelope, e
-
- none
-
No envelope, this is default.
- 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, f
-
- lowpass
-
No filtering, this is default.
- flat
-
Luma and chroma combined together.
- aflat
-
Similar as above, but shows difference between blue and red chroma.
- chroma
-
Displays only chroma.
- achroma
-
Similar as above, but shows difference between blue and red chroma.
- color
-
Displays actual color value on waveform.