Added include of stdint.h for uint8_t on linux and two functions

Just adding some minor stuff now that I've forked your great plugin. I needed to know how many frames are left when the video was ending (I'm using it with getVideoInfo().decodingDone). The include is for uint8_t because it would not be defined on GNU/Linux. If you don't want these functions, just add the include and deny this one :)