int get_audio_for_video(int vstream, int astream, int64_t &channel_mask);
static void get_info(char *path,char *text,int len);
int open_file(int rd,int wr);
int get_audio_for_video(int vstream, int astream, int64_t &channel_mask);
static void get_info(char *path,char *text,int len);
int open_file(int rd,int wr);