How to use ffmpeg for iOS?

Question

I need to use the following command for ffmpeg

ffmpeg -i "Video.mp4" -map 0:1 "AudioWithVocalfromStreamOne.mp3" -map 0:2 "AudioWithoutVocalfromStreamTwo.mp3"

I have successfully installed ffmpeg on my mac. I tried using FFMPEGWrapper , but it does not seem to use such parameters to use the "map".

I need to know how to extract streams from a video. I already have access to threads since the server side provides it to me using ffprobe at the end.