How to get correct Orientation for videos from PhotoLibrary iOS

ios, mpmovieplayercontroller, objective-c, uiinterfaceorientation, video

Solution

Only way which solved this issue for me is to capture thumbnail image from the video using method:

- (void)requestThumbnailImagesAtTimes:(NSArray *)playbackTimes timeOption:(MPMovieTimeOption)option

and then adding check on the thumbnail image like :

if (singleFrameImage.size.height > singleFrameImage.size.width) {
    // potrait video
} else {
    // landscape video
}

This solution is tested on videos captured from iPhone camera and also on a set (8-10) of videos randomly downloaded from internet.

Problem

I am trying to implement Instagram video cropping feature. For that i need to get correct orientation of the video with which i will layout my `MPMoviePlayerController` view in correct aspect ratio and user will then be able to pan the video and shown square video will be cropped on action. I am having problem with getting correct orientation of the video. I am using following code ``` AVURLAsset *asset = [AVURLAsset URLAssetWithURL:fileUrl options:nil]; NSArray *tracks = [asset tracksWithMediaType:AVMediaTypeVideo]; AVAssetTrack *track = [tracks objectAtIndex:0]; UIInterfaceOrientation orientation =[self orientationForTrack:track]; // method to get orientation - (UIInterfaceOrientation)orientationForTrack:(AVAssetTrack *)videoTrack { 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 UIInterfaceOrientationUnknown; } ``` Problem which i am having is that some times the videos which are actually in portrait, above piece of code is classifying it as landscape and vice versa. I only need to know two states of video's orientation (Landscape or Portrait). I want exact same orientation value which `MPMoviePlayerController` is interpreting. My application only supports Portrait orientation. Any help would be highly appreciated. PS: Above code is working fine for videos which are captured from iphone camera, videos which are downloaded or shared through the whatsapp are causing the problem.

Original source