Nodes
Keyer
Keyer: Nuke's basic keyer.
Keyer: Nuke's basic keyer. Pick an operation (luminance, red / green / blue, saturation, min / max of a channel, greenscreen, bluescreen) and shape the key with the range trapezoid A B C D; the key goes to the output channel (alpha by default). The channels knob names it.
| Node | Keyer |
|---|---|
| Type id | OC_N_keyer |
| Menu | Keyer › Keyer |
| Nuke class | Keyer |
| Code | opencomp_core/nodes/keyer/keyer.py |
Usage
- Values below A are 0, rise from A to B, stay 1 up to C and fall to 0 at D. C = D keeps everything above C at 1.
- greenscreen / bluescreen give 1 on the foreground and 0 on a clean screen; for real screens use ScreenKey or IBK.
Inputs and outputs
| Port | Name | Type |
|---|---|---|
| input 0 | Image | image |
| input 1 | mask | image |
| output 0 | Image | image |
Knobs
Panel tab Keyer, in panel order.
| Knob | Label | Type | Default | Range / values | Nuke knob | Description |
|---|---|---|---|---|---|---|
operation | operation | menu | luminance | luminance (luminance key), red (red keyer), green (green keyer), blue (blue keyer), saturation (saturation key), min_red (min red), min_green (min green), min_blue (min blue), max_red (max red), max_green (max green), max_blue (max blue)... | operation | how the key value is measured from the rgba colour. |
range | range (A B C D) | vector ×4 | 0, 1, 1, 1 | -1 to 2 | range | A B C D of the trapezoid. |
channels | output | text | alpha | output | Layer the op applies to: rgb, rgba, alpha, all, none, <layer> or <layer>.<ch> | |
mask_channel | mask | menu | none | none, rgba.alpha, rgba.red, rgba.green, rgba.blue | Mask channel, e.g. rgba.alpha (none = no mask) | |
inject | inject | bool | false | Copy the mask into mask.a for nodes downstream | ||
invert_mask | invert | bool | false | invert_mask | ||
fringe | fringe | bool | false | Only apply the effect at the edges of the mask | ||
mix | mix | float | 1 | 0 to 1 | mix |
Other knobs (Python, .nk and the assistant; not on the panel)
| Knob | Label | Type | Default | Range / values | Nuke knob | Description |
|---|---|---|---|---|---|---|
gl_color | Viewer Controls Color | float ×3 | 0, 0, 0 | 0 to 1 | ||
postage_stamp_frame | Static Frame | int | 1 | -2147483648 to 2147483647 | ||
lifetimeStart | Lifetime Start | int | 0 | -2147483648 to 2147483647 | ||
lifetimeEnd | Lifetime End | int | 100 | -2147483648 to 2147483647 | ||
useLifetime | Use Lifetime | boolean | false | |||
cached | Cached | boolean | false | |||
bookmark | Bookmark | boolean | false | |||
dope_sheet | Dope Sheet | boolean | false | |||
clone_group | Clone Group | string | ||||
link_source | Link Source | string | ||||
link_overrides | Link Overrides | string | ||||
split_views | Split Views | string | ||||
unpremult | (Un)premult by | enum | none | none, rgba.alpha | ||
invert_unpremult | invert | boolean | false | (Un)premultiply by 1 - alpha |
Nuke equivalent
Imports from and exports to Nuke's Keyer.
Knobs with a different name here:
| Nuke knob | Knob here |
|---|---|
output | channels |
Nuke knobs not in this list import as a knob of the same name, or are kept unchanged for export. See .nk import.