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我在这里使用 OSX QTKit 示例代码:http: //bit.ly/mAaHGI
我想在屏幕和保存的文件上裁剪视频,以模拟不同的纵横比。做这个的最好方式是什么?
它比仅仅调用一个裁剪方法要复杂一些,但是 Core Video 允许你操纵视频流。您可以在此处找到核心视频编程指南:
http://developer.apple.com/library/mac/#documentation/GraphicsImaging/Conceptual/CoreVideo/CVProg_Intro/CVProg_Intro.html