ComfyUI Node: Light_A_Video_Sampler

Light_A_Video_Sampler:

The Light_A_Video_Sampler is a specialized node designed to enhance video content by applying relighting effects. This node leverages advanced video processing techniques to adjust the lighting conditions of a video, allowing for creative transformations that can enhance the visual appeal or match specific artistic intentions. By utilizing this node, you can seamlessly integrate relighting effects into your video projects, providing a powerful tool for AI artists to experiment with different lighting scenarios without the need for reshooting or complex post-production processes. The node is particularly beneficial for creating consistent lighting across video frames, ensuring a cohesive look and feel throughout the video sequence.

Light_A_Video_Sampler Input Parameters:

model

The model parameter specifies the machine learning model used for processing the video. This model is responsible for interpreting the input video data and applying the desired relighting effects. The choice of model can significantly impact the quality and style of the output video, as different models may have varying capabilities and strengths in handling video data.

images

The images parameter refers to the input video frames that will be processed by the node. These frames serve as the canvas on which the relighting effects will be applied. The quality and resolution of the input images can affect the final output, so it is important to provide high-quality frames for optimal results.

relight_prompt

The relight_prompt parameter allows you to specify the desired lighting conditions or effects you wish to achieve in the video. This prompt guides the node in adjusting the lighting to match the specified conditions, enabling you to create specific moods or atmospheres in your video content.

inpaint_prompt

The inpaint_prompt parameter is used to define areas within the video frames that require inpainting, a process of filling in missing or corrupted parts of the image. This can be useful for correcting imperfections or enhancing specific regions of the video.

n_prompt

The n_prompt parameter is a numerical value that influences the node's processing behavior. It can be used to adjust the intensity or strength of the relighting effects applied to the video, allowing for fine-tuning of the output.

seed

The seed parameter is used to initialize the random number generator, ensuring that the relighting effects are reproducible. By setting a specific seed value, you can achieve consistent results across multiple runs of the node.

num_step

The num_step parameter determines the number of processing steps the node will perform. More steps can lead to more refined and detailed relighting effects, but may also increase the processing time.

strength

The strength parameter controls the intensity of the relighting effects applied to the video. A higher strength value results in more pronounced lighting changes, while a lower value produces subtler effects.

text_guide_scale

The text_guide_scale parameter adjusts the influence of textual prompts on the relighting process. This allows you to balance the impact of text-based guidance with other input parameters, providing greater control over the final output.

width

The width parameter specifies the width of the output video frames. This can be used to resize the video to meet specific requirements or to match the aspect ratio of the input frames.

height

The height parameter specifies the height of the output video frames. Similar to the width parameter, it allows for resizing the video to achieve the desired dimensions.

bg_target

The bg_target parameter defines the target background lighting conditions for the video. This can be used to ensure that the background lighting is consistent with the overall relighting effects applied to the video.

mask_repo

The mask_repo parameter is used to specify a repository of masks that can be applied to the video frames. These masks can be used to selectively apply relighting effects to specific areas of the video, providing greater control over the final output.

Light_A_Video_Sampler Output Parameters:

relight_video

The relight_video parameter is the primary output of the node, representing the video with the applied relighting effects. This output video reflects the changes made based on the input parameters, showcasing the enhanced lighting conditions and any other specified transformations.

Light_A_Video_Sampler Usage Tips:

• Experiment with different relight_prompt values to achieve various lighting effects and moods in your video projects.
• Use the strength parameter to control the intensity of the relighting effects, starting with lower values for subtle changes and increasing as needed for more dramatic transformations.
• Set a specific seed value to ensure consistent results across multiple runs, especially when fine-tuning the relighting effects.

Light_A_Video_Sampler Common Errors and Solutions:

Invalid input shape: <sample.shape>

• Explanation: This error occurs when the input video frames do not match the expected dimensions or format required by the node.
• Solution: Ensure that the input video frames are correctly formatted and match the expected dimensions. Check the documentation for the required input shape and adjust your video frames accordingly.

ValueError: Invalid input shape: <sample.shape>

• Explanation: This error indicates that the input video frames have an unsupported shape, which the node cannot process.
• Solution: Verify the shape of your input video frames and ensure they conform to the expected format. Adjust the dimensions or format of your video frames to resolve this issue.