ComfyUI Node: FLAVR VFI

FLAVR VFI:

FLAVR VFI is a node designed for video frame interpolation, which is the process of generating intermediate frames between existing ones to create smoother motion in videos. This node leverages the FLAVR (Flow-Agnostic Video Representations) model, which is known for its ability to handle complex motion and produce high-quality interpolated frames. The primary benefit of using FLAVR VFI is its capability to enhance the visual fluidity of videos, making it ideal for applications such as slow-motion effects, frame rate conversion, and video enhancement. The node is particularly useful for AI artists looking to improve the visual appeal of their video content without needing deep technical expertise in video processing.

FLAVR VFI Input Parameters:

frames

This parameter represents the input video frames that you want to interpolate. The frames should be provided in a sequence, and the quality of these frames will directly impact the quality of the interpolated output. There is no specific minimum or maximum value for the number of frames, but providing high-resolution frames will yield better results.

multiplier

The multiplier parameter determines the factor by which the frame rate will be increased. Currently, FLAVR only supports a 2x interpolation, meaning it can double the frame rate of the input video. If a different value is set, a warning will be issued, and the process will continue with the multiplier set to 2. The default value is 2.

optional_interpolation_states

This parameter allows you to provide any optional states that might be used during the interpolation process. These states can influence the behavior of the interpolation algorithm, but they are not mandatory for basic operation. If not provided, the node will use default states.

FLAVR VFI Output Parameters:

output_frames

This parameter contains the interpolated frames generated by the FLAVR VFI node. These frames are the result of the interpolation process and will have a higher frame rate compared to the input frames. The output frames can be used directly in video editing software or further processed for additional effects.

FLAVR VFI Usage Tips:

• Ensure that the input frames are of high quality to achieve the best interpolation results.
• Always set the multiplier to 2, as this is the only supported value for FLAVR VFI.
• Use the optional_interpolation_states parameter to fine-tune the interpolation process if you have specific requirements or advanced knowledge of the model.

FLAVR VFI Common Errors and Solutions:

"Currently, FLAVR only supports 2x interpolation. The process will continue but please set multiplier=2 afterward"

• Explanation: This warning indicates that the multiplier parameter was set to a value other than 2, which is not supported by the FLAVR model.
• Solution: Set the multiplier parameter to 2 to avoid this warning and ensure proper operation of the node.

"AssertionError: Batch size must be 4 for ST-MFNet"

• Explanation: This error occurs when the batch size of the input frames does not match the required batch size of 4 for the ST-MFNet model used within FLAVR.
• Solution: Ensure that the input frames are provided in batches of 4 to comply with the model's requirements.