Copy
Copy channels from A into the B stream.
| Node | Copy |
|---|---|
| Menu | Channel › Copy |
| Names in each format | |
| .oink comp (JSON) | "type": "OC_N_copy" |
| .nk script | Copy (how .nk import works) |
| Python | nuke.createNode("Copy") |
| Assistant (MCP) | create_node(type="Copy") |
| Tab search | copy |
Inputs and outputs
| Port | Name | Type |
|---|---|---|
| input 0 | B | image |
| input 1 | A | image |
| input 2 | mask | image |
| output 0 | Image | image |
Knobs
Panel tab Copy, in panel order.
| Knob | Label | Type | Default | Range / values | .nk knob | Description |
|---|---|---|---|---|---|---|
from0 | Copy channel | text | rgba.alpha | from0 | ||
to0 | to | text | rgba.alpha | to0 | ||
from1 | Copy channel | text | none | from1 | ||
to1 | to | text | none | to1 | ||
from2 | Copy channel | text | none | from2 | ||
to2 | to | text | none | to2 | ||
from3 | Copy channel | text | none | from3 | ||
to3 | to | text | none | to3 | ||
channels | Layer Copy | menu | none | rgba, rgb, alpha, all, none | channels | Channels copied from A to B where A has them |
bbox | Set BBox to | menu | union | union, B side, A side | bbox | |
metadata_from | metadata from | menu | B | B, A, All | metainput | |
range_from | range from | menu | B | B, A, All | rangeinput | |
mask_channel | mask | menu | none | none, rgba.alpha, rgba.red, rgba.green, rgba.blue | Mask channel, e.g. rgba.alpha (none = no mask; a linked mask input then uses rgba.alpha) | |
invert_mask | invert | bool | false | invert_mask | ||
unpremult | (un)premult by | menu | none | none, rgba.alpha | unpremult | |
invert_unpremult | invert | bool | false | invert_unpremult | ||
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 | .nk 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 |
Knob names in .nk scripts
| .nk knob | Knob here |
|---|---|
metainput | metadata_from |
rangeinput | range_from |
Other .nk knobs use the same name here. See .nk import.
Examples
Open these from Help › Examples…, or from the ? menu in this node's Properties panel.
- Copy an alpha between streams (
examples/channel/copy_alpha.oink): Copy takes rgba.alpha from its A input (the CandleGlass render) and writes it into the B stream (the Desk photo), then Premult multiplies the colour by that alpha. The same pattern moves any channel between streams.