ios 视频编辑,添加文字、图片(CA动画)水印,合成视频 参考link: 1,http://stackoverflow.com/questions/15932041/how-can-i-add-a-watermark-in-a-captured-video-on-ios(添加水印) 2,https://abdulazeem.wordpress.com/2012/04/02/video-manipulation-in-ios-resizingmerging-and-overlapping-videos-in-ios(合成视频) 3,http://www.raywenderlich.com/30200/avfoundation-tutorial-adding-overlays-and-animations-to-videos(添加水印动画) 示例:git@github.com:ludawei/TestIOSLibs.git