Preparing Images for Improved Image-to-Video Generation with LTX Video in ComfyUI

When working with LTX Video’s image-to-video generation, creators often face two key challenges. First, captions for input images can be inconsistent or unclear, leading to mismatched results. Second, the generated videos often appear static, lacking the fluidity expected in dynamic sequences. This article introduces a ComfyUI workflow designed to address these issues. It helps refine image captions for better alignment with video goals and enhances image preparation to generate more natural and engaging motion.

Installation

• Drag the full size of the image to canvas
  
• Click on Manager

  

• Click on Install Missing Custom Nodes

  

• Click on Install to install any missing custom nodes

  

• Click on Restart to restart ComfyUI. If it’s not working after restart, you can quit ComfyUI and start it up again.

  

Usage

• Drag the original image to the Load Image box.
• Specify width and height. 512×768 works best with portrait images while 768×512 works beat with landscape images.

  

• Specify crf in the Video Combine node. Recommended value is 20 to 30. You have to experiment with this value. Typically, a larger value results in greater movement in the generated video.

  

• Pick the caption_method. Recommened methods is detailed. You can also specify prefix_caption and suffix_caption. You can specify movement and camera action here. These will be added to the caption.

  

• Finally, click on Queue to generate the image and caption.

Example

This is a video generated using crf 25.