裁剪视频画面大小:
http://www.leawo.cn/space-3815757-do-thread-id-71224.html
想象对话框 视频加对话框:
http://www.leawo.cn/space-3815757-do-thread-id-71236.html
如何在小视频上加文字:
http://www.leawo.cn/space-3815757-do-thread-id-71249.html