let stream = strres.unwrap();
let keyframe = (self.frame_pos[self.cur_frame] & 1) != 0;
let ts = NATimeInfo::new(Some(self.cur_frame as u64), None, None, self.tb_num, self.tb_den);
let stream = strres.unwrap();
let keyframe = (self.frame_pos[self.cur_frame] & 1) != 0;
let ts = NATimeInfo::new(Some(self.cur_frame as u64), None, None, self.tb_num, self.tb_den);