iOS应用程序的快速屏幕录制 [英] Fast Screen Recording of iOS App
问题描述
我是OpenGL ES的新手. 我正在尝试编写代码来录制iOS应用程序(尤其是游戏)的屏幕.
I'm new to OpenGL ES. I'm trying to write code for screen recording of iOS apps, especially games.
我正在使用此答案中的代码描述的渲染到纹理"方法来捕获屏幕并编写cocos2d游戏的视频.
我所做的一个修改是，当我调用CVOpenGLESTextureCacheCreate时，我正在使用
[EAGLContext currentContext]
代替
I'm using the 'render to texture' method described with code in this answer to capture screen and write the video for a cocos2d game.
One modification I made was that, when I call CVOpenGLESTextureCacheCreate then I'm using
[EAGLContext currentContext]
instead of
[[GPUImageOpenGLESContext sharedImageProcessingOpenGLESContext] context]
它确实录制了视频，但是有两个问题
It does record the video but there are two issues
(1)-开始记录时，屏幕上的新图形将停止.我也希望该应用程序继续在屏幕上绘图.由于我是OpenGL ES的新手，所以我对帧缓冲区对象等没有深刻的了解，因此很难弄清楚如何在屏幕上同时绘制和捕获屏幕.在这方面，我将感谢一个代码示例.
(1)- When it starts recording then new drawing on the screen stops. I want the app to keep on drawing on the screen too. As I'm new to OpenGL ES, I don't have deep understanding of frame buffer objects etc., so I have a hard time figuring out how to simultaneously draw on screen and capture the screen as well. I'll appreciate a code example in this regard.
(2)-录制的视频上下颠倒.如何获得正确的方向?
(2)- The recorded video is flipped upside down. How can I get it in correct direction?
以前，我也考虑过glReadPixels方法，但这存在性能缺陷.
Previously I considered glReadPixels method too, but that has performance drawbacks.
更新:也想到了一些想法.根据我的一点理解，
Update: a couple of ideas also came to mind. According to my little understanding,
我可以简单地将纹理绘制回屏幕，但不知道如何.
I could simply draw my texture back to screen, but don't know how.
OR
我可以有一个辅助FBO，并且可以在其上附加纹理，即
I could have a secondary FBO and I could attach the texture to it, i.e.
glGenFramebuffersOES(1, &textureFrameBuffer);
glBindFramebufferOES(GL_FRAMEBUFFER_OES, textureFrameBuffer);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, CVOpenGLESTextureGetName(renderTexture), 0);
//Then I restore the screen FBO.
glBindFramebufferOES(GL_FRAMEBUFFER_OES, 1);
但是，如果我这样做了，那么如何将屏幕图形复制到我的辅助FBO中?
But if I do that, then how do I copy the screen-drawing to my secondary FBO?
推荐答案
有现成的解决方案，因此，如果您不想重新发明轮子，可以尝试Everyplay(
There are readymade solutions for this, so if you're not looking to re-invent the wheel, you can try out Everyplay (https://everyplay.com/about).
在OpenGL级别记录屏幕的文档可以在以下位置找到: https://developers.everyplay.com/doc/Everyplay-integration-to-iOS-game
The documentation for recording the screen from the OpenGL level can be found here: https://developers.everyplay.com/doc/Everyplay-integration-to-iOS-game
免责声明:我为制作Everyplay的公司工作
Disclaimer: I work for the company that makes Everyplay
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