ComfyUI Node: Load V-Kps Path From Video

Load V-Kps Path From Video:

The Load_Kps_Path_From_Video node is designed to extract keypoint sequences (KPS) from a video file, which are essential for various AI-driven animation and facial analysis tasks. This node processes each frame of the video to detect facial keypoints, ensuring that only one face is present per frame. It then saves these keypoints in a specified format, making them ready for further processing or analysis. This functionality is particularly useful for AI artists who need to work with precise facial movements and expressions derived from video content, enabling more accurate and dynamic animations.

Load V-Kps Path From Video Input Parameters:

vexpress_model_path

This parameter specifies the path to the V-Express model directory, which contains the necessary models for facial keypoint detection. The correct model path ensures that the node can accurately detect and process facial keypoints. There is no specific minimum or maximum value, but it must be a valid directory path containing the required models.

video_path

This parameter indicates the path to the video file from which the keypoints will be extracted. The video file should be in a supported format such as mp4, webm, mkv, or avi. The video path must be valid and accessible for the node to function correctly.

image_size

This parameter defines the size to which each video frame will be resized before processing. It ensures that the frames are of a consistent size, which is crucial for accurate keypoint detection. The value should be an integer representing the width and height of the frame (e.g., 512 for a 512x512 frame). The default value is typically set to 512.

Load V-Kps Path From Video Output Parameters:

VKPS_PATH

This output parameter provides the path to the saved keypoint sequence file. The file contains the extracted keypoints from the video, stored in a format that can be easily loaded and used for further processing. This path is essential for accessing the keypoint data for subsequent tasks.

Load V-Kps Path From Video Usage Tips:

• Ensure that the video file contains only one face per frame to avoid errors during keypoint extraction.
• Use a consistent and appropriate image size to maintain the accuracy of keypoint detection across different videos.
• Verify that the V-Express model path is correctly set and contains all necessary models for the node to function properly.

Load V-Kps Path From Video Common Errors and Solutions:

ValueError: <kps_path> not exists! Please check the input!

• Explanation: This error occurs when the specified keypoint sequence file path does not exist after processing.
• Solution: Ensure that the video file is correctly specified and accessible, and that the V-Express model path is correctly set.

AssertionError: There are <n> faces in the <frame_idx>-th frame. Only one face is supported.

• Explanation: This error indicates that more than one face was detected in a frame, which the node does not support.
• Solution: Use a video with only one face per frame or preprocess the video to ensure only one face is present in each frame.

FileNotFoundError: <video_path> does not exist

• Explanation: This error occurs when the specified video file path is invalid or the file is not accessible.
• Solution: Verify that the video file path is correct and that the file is accessible from the specified location.