Javascript-how to implement video filters of live apps and special effects similar to faceu face?

Example: 1. the principle of video Filter Implementation, which vendors provide services on the market (Camera360 and tutusdk have image filter sdks) 2. how does faceu face cute video effects be achieved? Does any vendor provide services or sdks? Example:
1. The implementation principle of video filters, which vendors provide services on the market (Camera360 and tutusdk have image filter sdks)
2. How does faceu face cute video effects be achieved? Does any manufacturer provide services or sdks?

Reply content:

Example:
1. The implementation principle of video filters, which vendors provide services on the market (Camera360 and tutusdk have image filter sdks)
2. How does faceu face cute video effects be achieved? Does any manufacturer provide services or sdks?

I wrote it on Android. I saw a Demo from a foreigner on Git and I will look for it for you ~~
The principle is that the video is actually a filter applied to an image with one frame. The image of each frame is rendered by opengl and then drawn on surfaceView.
The SDK does not seem to be available yet. It uses handwritten RGB color detection.

GPUImage: Git.

1. Based on the returned results of face recognition, the location of key elements such as face, eyes, and mouth, the image is scaled, rotated, and drawn at the specified position of the image. Currently, no sdks are available, which is easy to implement.