The VAE Encode node can be used to encode pixel space images into latent space images, using the provided VAE.

Denoising strength control how much ComfyUI should follow the base image.

DEnoise with strength 1.00 will generate completely new image !

If the image or video resolution is too high, you will need to reduce it. This id because at high resolution, the processing time will be very high and you will get strange result!

In this video, we will use "Upscale Image By" node.

Scale_by ratio is for given inputs determines how much the image size is increased during restoration.

Click on below link for video tutorials:

https://www.youtube.com/@CgTopTips/videos