Android Question Pipe - stdin in Android?

I am trying out some features in my ffmpegwrapper and there is a possibility to use a "pipe" as an input-source. The command in ffmpeg is something like this:
Basically I am supposed to pass the data stream to ffmpeg with stdin

Now, anyone knows if "pipes" and "stdin" are available in Android (and B4A) and how to use them?

Thanks.