把视频背景替换成图片:
http://www.leawo.cn/space-3815757-do-thread-id-71840.html
视频加动态水印:
http://www.leawo.cn/space-3815757-do-thread-id-71861.html
视频加标记:
http://www.leawo.cn/space-3815757-do-thread-id-71890.html