How to apply black and white effect to a color video in iOS

Question

In my application I have a color video which I want to make as black and white video. Is there any framework that supports this in iOS? If so, how to implement that effect o

Answer 1

See the opensource Framework named: GPUImage https://github.com/BradLarson/GPUImage/
The filter name GPUImageGrayscaleFilter is what you want
This framework included the sample code, so you can learn how to use GPUImageGrayscaleFilter in your apps easily