Video Sampler Modifier
Updated: 21 Aug 2025
Samples a video to generates a modifier value.
Video Sampler Modifier
Method #
This node outputs a modifier value based on the RGBA values of pixels from a video input. You can either sample a single spot, or sample an area with the Sample Rectangular Area Parameter.
The response of the modifier can be tuned to a single band of colour using the weighting attributes.
The output is a numeric value that can be further processed with other modifiers, or directly connected to a parameter in another node, using the operation method selected.
Parameters
These properties control the core behaviours of the node.
Parameter Details Sample Location U
Point along the U axis that is sampled. When a rectangular area is being sampled, this will define the lower bounds of the rectangle.
Sample Location U1
When a rectangular area is being sampled, this will define the upper bounds of the rectangle along the U axis.
Sample Location V
Point along the V axis that is sampled. When a rectangular area is being sampled, this will define the lower bounds of the rectangle.
Sample Location V1
When a rectangular area is being sampled, this will define the upper bounds of the rectangle along the V axis.
Smoothing
Adjust the amount of smoothing to applied to the output value.
Scale
Adjust the scale/range of the modifier.
Operation
The operation to be performed on the targeted parameter.
- Add : Adds to the parameter value.
- Subtract : Subtracts from the parameter value.
- Multiply : Multiplies the parameter value.
- Replace : Replaces the parameter value.
Red Weight
Determines the proportion of the output that will be determined by the red channel of the sampled pixel/region.
Green Weight
Determines the proportion of the output that will be determined by the green channel of the sampled pixel/region.
Blue Weight
Determines the proportion of the output that will be determined by the blue channel of the sampled pixel/region.
Alpha Weight
Determines the proportion of the output that will be determined by the alpha channel of the sampled pixel/region.
Latency Mode
How the video is sampled with respect to performance.
- Performance : The video is sampled with some latency, to avoid stalling the GPU and giving higher performance.
- Low Latency (Slower) : The video value is sampled immediately, stalling the GPU but giving the lowest possible latency.
Location In Pixels
The sample location describes the location in pixels, not a percentage along width and length.
Inputs
These properties control the core behaviours of the node.
| Parameter | Details |
|---|---|
| Sample Location U | Point along the U axis that is sampled. When a rectangular area is being sampled, this will define the lower bounds of the rectangle. |
| Sample Location U1 | When a rectangular area is being sampled, this will define the upper bounds of the rectangle along the U axis. |
| Sample Location V | Point along the V axis that is sampled. When a rectangular area is being sampled, this will define the lower bounds of the rectangle. |
| Sample Location V1 | When a rectangular area is being sampled, this will define the upper bounds of the rectangle along the V axis. |
| Smoothing | Adjust the amount of smoothing to applied to the output value. |
| Scale | Adjust the scale/range of the modifier. |
| Operation |
The operation to be performed on the targeted parameter.
|
| Red Weight | Determines the proportion of the output that will be determined by the red channel of the sampled pixel/region. |
| Green Weight | Determines the proportion of the output that will be determined by the green channel of the sampled pixel/region. |
| Blue Weight | Determines the proportion of the output that will be determined by the blue channel of the sampled pixel/region. |
| Alpha Weight | Determines the proportion of the output that will be determined by the alpha channel of the sampled pixel/region. |
| Latency Mode |
How the video is sampled with respect to performance.
|
| Location In Pixels | The sample location describes the location in pixels, not a percentage along width and length. |
| Name | Description | Typical Input |
|---|---|---|
| Video Node | The video node from which values will be generated. | Video Loader |