one-dreamer/Cropping-Video-like-Vine — pull request #1 by maximveksler (2014-04-24 08:48:17+00:00)
Title: More generic solution to clipping square use case

Apple will always encode the preferred transform on the clipVideoTrack to display it correctly for device in landscape right position. This can be exploited to simply the transformation matrix implementation.

Just a suggestion :)