[FFmpeg-user] Record microphone on android

[me at robpitt.me.uk]

Hello, 

I can record the screen as video with

ffmpeg -f fbdev -r 25 -i /dev/graphics/fb0 -y -vcodec mpeg4 -b 2000k -s 480x853 new.mp4

I would like to record the microphone as the audio track, how do I accomplish this? 
Sent from my android device.