IPhone: effects for recorded video?

Question

I have a program that allows the user to record video. I have to provide options such as Black & White, Crystal, etc., Like how the iPhone “Viddy” application does to set more effects for the recorded video. How can I achieve this programmatically?

I beg you, please.

Thanks!

Answer 1

Here is one way:

• Start capturing video frames with AVCaptureSession + AVCaptureVideoDataOutput
• Convert frames to OpenGL textures for display
• Record GLSL shaders for each desired effect and apply to textures from step 2
• Reading textures + effects and writing to a movie file
• Optimize until performance is adequate.
• goto 5

5 is probably the most important step. You will need to configure and configure the algorithm, video quality, texture size, frame rate, shaders, etc.

Enjoy it!