Background Plate Subtract
Updated: 2 Oct 2025
Removes the background from a video using a background plate.
Background Plate Subtract
Method #
This node removes the background from a video by first supplying the node with a background image without the subject in it, it then keeps track of anything that moves in front and attempts to remove the background.
Parameters
These properties control the core behaviours of the node.
Parameter Details Active
Enables or disables the effect. Disabling the effect means it will no longer compute, so disabling a node when not in use can improve performance.
Blend Amount
Changes the opacity of the new effect over the original image.
Blend Mode
Choose how the image blends with the scene. See Blend Modes for details.
Blend Mode (Alpha)
Change how the generated effect blends with the parent image alpha.
Affected Channels
Toggle which of the RGBA channels are affected by the effect.
Capture Background Plate
Capture the background plate
Difference Threshold
Difference between the 2 images
Difference Scale
Difference Scale
Output Mask
Show generated mask
Show Background Plate
Show the used backround plane
The properties control the time at which the node is active. See Timeline for editing time segments.
Parameter Details Duration
Control the duration of the node’s time segment.
- Composition Duration : Use the length of the composition for the node’s time segment duration.
- Custom : Set a custom duration for the node’s time segment.
Node Time
The custom start and end time for the node.
Duration (Timecode)
The length of the node’s time segment (in time).
Duration (Frames)
The length of the node’s time segment (in frames).
Time Segment Enabled
Set whether the node’s time segment is enabled or not in the Timeline.
Inputs
These properties control the core behaviours of the node.
| Parameter | Details |
|---|---|
| Active | Enables or disables the effect. Disabling the effect means it will no longer compute, so disabling a node when not in use can improve performance. |
| Blend Amount | Changes the opacity of the new effect over the original image. |
| Blend Mode | Choose how the image blends with the scene. See Blend Modes for details. |
| Blend Mode (Alpha) | Change how the generated effect blends with the parent image alpha. |
| Affected Channels | Toggle which of the RGBA channels are affected by the effect. |
| Capture Background Plate | Capture the background plate |
| Difference Threshold | Difference between the 2 images |
| Difference Scale | Difference Scale |
| Output Mask | Show generated mask |
| Show Background Plate | Show the used backround plane |
The properties control the time at which the node is active. See Timeline for editing time segments.
| Parameter | Details |
|---|---|
| Duration |
Control the duration of the node’s time segment.
|
| Node Time | The custom start and end time for the node. |
| Duration (Timecode) | The length of the node’s time segment (in time). |
| Duration (Frames) | The length of the node’s time segment (in frames). |
| Time Segment Enabled | Set whether the node’s time segment is enabled or not in the Timeline. |
| Name | Description | Typical Input |
|---|---|---|
| Background Plate | Image of background without subject in it. | Video Loader |