#define SCANTIME(fromwhere, min, sec, frame) sscanf(fromwhere,"%d%*c%2d%*c%2d",&min,&sec,&frame);
#define MSEC(min, sec, frame) (min*60+sec)*1000+frame*1000/75 //75 frames per second
#define PTIME(where, min, sec, frame)  sprintf(where,"%3d:%02d:%02d",min,sec,frame)