ComfyUI Node: Video Preprocess (YC)

Video Preprocess (YC):

The VideoPreprocess node is designed to enhance and prepare video frames for further processing or analysis. It offers a comprehensive suite of preprocessing techniques that can be applied to video frames to improve their quality and ensure they are in the optimal format for subsequent operations. This node is particularly beneficial for AI artists and developers working with video data, as it simplifies the task of normalizing, resizing, and applying various enhancements to video frames. By utilizing this node, you can ensure that your video frames are consistently formatted and enhanced, which can lead to better results in tasks such as video blending, analysis, or any AI-driven video processing. The node's capabilities include interpolation, edge feathering, smoothing, sharpness adjustment, and anti-aliasing, all of which contribute to producing high-quality video frames ready for further creative or analytical endeavors.

Video Preprocess (YC) Input Parameters:

frames

The frames parameter accepts video frames in the form of images. These frames can be provided as a list of NumPy arrays or PyTorch tensors. The node will standardize these inputs, ensuring they are in a consistent format for processing. This parameter is crucial as it forms the basis of the preprocessing operations, and the quality and format of the input frames directly impact the effectiveness of the preprocessing.

interpolation

The interpolation parameter determines the method used for resizing video frames. Options include bilinear, bicubic, and lanczos, each offering different levels of smoothness and detail preservation. The choice of interpolation affects the quality of the resized frames, with lanczos typically providing the highest quality at the cost of computational complexity. This parameter is essential for ensuring that frames are resized without losing important visual information.

edge_feather

The edge_feather parameter controls the degree of feathering applied to the edges of the video frames. Feathering softens the edges, which can be useful for blending frames seamlessly. The value ranges from 0.0 (no feathering) to higher values for more pronounced effects. This parameter is particularly useful in scenarios where smooth transitions between frames are desired.

smoothing

The smoothing parameter applies a Gaussian blur to the video frames, helping to reduce noise and create a more polished appearance. The value ranges from 0.0 (no smoothing) to higher values for increased blur. Smoothing is beneficial for reducing visual artifacts and enhancing the overall aesthetic of the video frames.

sharpness

The sharpness parameter adjusts the clarity of the video frames. A value of 0.5 represents the default sharpness, with values above 0.5 increasing sharpness and values below reducing it. This parameter is useful for enhancing details in the frames, making them more visually striking.

anti_aliasing

The anti_aliasing parameter is a boolean that determines whether anti-aliasing is applied to the video frames. Anti-aliasing helps to smooth out jagged edges, resulting in a cleaner and more professional appearance. This parameter is particularly important when resizing frames, as it helps to maintain visual quality.

Video Preprocess (YC) Output Parameters:

IMAGE

The output of the VideoPreprocess node is a processed image tensor, which contains the preprocessed video frames. These frames are formatted in the BHWC (Batch, Height, Width, Channels) format and are converted to uint8, making them suitable for further processing or display. The output frames are enhanced and normalized, ensuring they are ready for any subsequent video processing tasks.

Video Preprocess (YC) Usage Tips:

• To achieve the best quality when resizing frames, consider using the lanczos interpolation method, especially if preserving detail is a priority.
• Utilize the edge_feather parameter to create smooth transitions between frames, which is particularly useful in video blending applications.
• Adjust the sharpness parameter to highlight details in your video frames, making them more visually appealing and impactful.

Video Preprocess (YC) Common Errors and Solutions:

Empty frames list

• Explanation: This error occurs when the input frames list is empty, meaning no frames are provided for processing.
• Solution: Ensure that you provide a non-empty list of frames as input to the node. Check your data source to confirm that frames are being correctly loaded and passed to the node.

Invalid interpolation mode

• Explanation: This error arises when an unsupported interpolation mode is specified.
• Solution: Verify that the interpolation mode is one of the supported options: bilinear, bicubic, or lanczos. Correct any typos or unsupported values in the input parameters.