IOS Detect video orientation

/* Detect movie  orientation */
+ (UIInterfaceOrientation)detectOrientationMovie:(AVAsset *)asset {
    AVAssetTrack *videoTrack = [[asset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
    CGSize size = [videoTrack naturalSize];
    CGAffineTransform txf = [videoTrack preferredTransform];
   
    if (size.width == txf.tx && size.height == txf.ty) {
       
        return UIInterfaceOrientationLandscapeRight;
    } else if (txf.tx == 0 && txf.ty == 0){
       
        return UIInterfaceOrientationLandscapeLeft;
    }else if (txf.tx == 0 && txf.ty == size.width){
       
        return UIInterfaceOrientationPortraitUpsideDown;
    }else {
      
        return UIInterfaceOrientationPortrait;
    }
    return UIInterfaceOrientationPortrait;
}

/* Detect movie  orientation */
+ (UIInterfaceOrientation)detectOrientationMovieWithPath:(NSString*) path {
    NSURL*    video_inputFileUrl = [NSURL fileURLWithPath:path];
    AVURLAsset* videoAsset = [[[AVURLAsset alloc]initWithURL:video_inputFileUrl options:nil] autorelease];
    AVAssetTrack *videoTrack = [[videoAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
    CGSize size = [videoTrack naturalSize];
    CGAffineTransform txf = [videoTrack preferredTransform];
   
    if (size.width == txf.tx && size.height == txf.ty) {
        return UIInterfaceOrientationLandscapeRight;
    } else if (txf.tx == 0 && txf.ty == 0){
        return UIInterfaceOrientationLandscapeLeft;
    }else if (txf.tx == 0 && txf.ty == size.width){
        return UIInterfaceOrientationPortraitUpsideDown;
    }else {
        return UIInterfaceOrientationPortrait;
    }
    return UIInterfaceOrientationPortrait;
}

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