Overlay to AVAsset Video
<p>I have a video saved in an AVAsset. Is there a simply way for me to add an overlay to the video so that I can have a watermark in the corner of the screen?</p>

<p>I am already adding it to an AVMutableCompositionTrack then creating an AVAssetExportSession. Or is it impossible and do I need to create an instance of AVMutableVideoComposition as well and how do I so?</p>

<p>Is there a way for me to convert my AVAsset to an AVMutableVideoComposition and back?</p>