ios - ios: How to add remote audio file to AVAudioMix

Question

I am developing a simple video editor on ios using AVFoundation. one part of the video editor is to mix an audio which is saved remotely. for eg: http://zfete.com/sample.mp4

now i am using AVAudioMix to mix an audio track which is working fine for local files. how can i use AVAudioMix to add a remote audio track.

Thanks in Advance.