How do I join two video files in my iPhone application using FFMPEG?

I would like to join two video files within my iPhone application using the开发者_高级运维 FFMPEG library, but I can't figure out how to do this. Does anyone have any experience with this?

Unfortunatley, if you planning to release your app to the App Store, you won't be able to use libavcodec since it is licensed under GPL. However, there is tutorial in the FFmpeg docs on how join two files if that is any help.