想给录制的视频加一个片头，看SCRecord看起来没看懂。。求大神指导
http://wenku.baidu.com/link?url=csinNFY-Bb4ljIfGWpmos6PRJWe2AOB_EhmWUozca61YRl00MG9haS7eCB2Viqf6-eFygQHKXfKpzxijF3gzXgpmT_QLANyChioalRt3eJm