static void get_parameters(BC_WindowBase *parent_window,Asset *asset,
BC_WindowBase *&format_window,int audio_options,int video_options);
static int check_sig(Asset *asset);
+ int get_best_colormodel(int driver, int vstream);
int get_video_info(int track, int &pid, double &framerate,
int &width, int &height, char *title=0);
int get_audio_for_video(int vstream, int astream, int64_t &channel_mask);