비디오파일 duration 가져오기

- (NSString *)getVideoFileDuration:(NSString *)fileName {

    NSString *videoFilePath = [[self localVideoStorageDir] stringByAppendingPathComponent:fileName];

    NSURL *url = [NSURL fileURLWithPath:videoFilePath];

    AVURLAsset *sourceAsset = [AVURLAsset URLAssetWithURL:url options:nil];

    CMTime duration = sourceAsset.duration;

    NSInteger seconds = (int)CMTimeGetSeconds(duration);

    

    NSDate* date = [NSDate dateWithTimeIntervalSince1970:seconds];

    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];

    [dateFormatter setTimeZone:[NSTimeZone timeZoneWithName:@"UTC"]];

    if (seconds >= 360) {

        [dateFormatter setDateFormat:@"HH:mm:ss"];

    } else{

        [dateFormatter setDateFormat:@"mm:ss"];

    }

    NSString* result = [dateFormatter stringFromDate:date];

    return result;

}