}
if seek_info.pos < self.movi_pos { return Err(DemuxerError::SeekError); }
let skip_size = (seek_info.pos - self.movi_pos) as usize;
}
if seek_info.pos < self.movi_pos { return Err(DemuxerError::SeekError); }
let skip_size = (seek_info.pos - self.movi_pos) as usize;