Android : What is best way to feed ffmpeg in Android?

I have compiled ffmpeg for Android for rtmp. I want to feed ffmpeg by video and audio (2 channels) at the same time. I found a solution by just one input (only video in my case) pipe streaming (stdin). I'm trying to use pure Java code.

I know that ffmpeg can comsume data from numbered (or may be named Pipe):

ffmpeg -i pipe:Number ...

Number == 0 it means stdin (i'm using it for video) But what is the way to create a pipe of another number?

I've tried mkfifo MYFIFO but the Android gives me IOExcepion

I've tried Filedescriptor but getFd() give an error too. Futhermore, it requires high-level API.

Is it possible to solve this problem?