how to record screen video as like Talking Tomcat

问题:

hey i m trying the record the gameplay of my game so that i can upload its video to youtube from device itself...m trying to do same thing as Talking tomcat app for iphone..recording the video then playing it ,etc...

i m using glReadPixels() for reading framebuffer data and then writing it to video with the help of AVAssetWriter in AVFoundation framwork. But reading the data on each drawing decreases the FPS from around 30-35 to 2-3 only while using glReadPixels.

i think Talking tomcat is also made with the help of Opengl ES it also has the video recording facility but it doesnot slows down while reading each frame any idea.... ?

回答1:

In case someone want to implement the same..i figured out myself. First of all to my surprise i found that talking tomcat is not a 3D game app...it uses frame animations for all movements. and if some one wants to capture the that kind of view then they can use following code---

UIGraphicsBeginImageContext(self.view.bounds.size); //self.view.window.frame.size
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil);

and then use AVAssetWriter for creating the video from that frames. ofcourse you can find code for that in some other post.. For me its not useful as i have to capture 3D part.. Cheers

回答2:

The question isn't new, but I thought I'd pitch in:

We provide an SDK called "Everyplay" that allows you to do exactly what you're looking for. It's free to use, and is lightweight.

We provide out-of-the-box integrations for Unity3D, cocos2d (1.x, 2.x), cocos2d-x, and you can of course integrate to a custom OpenGL-based game engine.

The documentation is available at https://developers.everyplay.com/doc

The documentation contains an example app key to use when developing, but you can of course sign up for your own client key at https://developers.everyplay.com/