Programmatically access orientation of an iPhone video

Question

I need to access a video returned by the UIImagePickerController and know if it was recorded portrait or landscape. I\'ve seen references to mov_read_tkhd but I\'m not sure if t

Answer 1

On iOS 4 and above, with 3GS/3rd gen iTouch or better, you can use the new AVFoundation libraries.

Something like:

NSURL *url = // url to the video returned by the picker
AVAssetTrack *videoTrack = [[url tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
videoTrack.preferredTransform; // CGAffineTransform that tells you whether the video is rotated from original orientation
videoTrack.naturalSize; // CGSize that tells you the current dimensions of the video