ここを参考に
http://www.instructables.com/id/View-RTMP-Stream-on-Raspberry-Pi/
omxplayer, mkfifo, rtmpdumpを使う
RTMPのサンプルはここのを使った
http://www.hdwplayer.com/rtmp-streaming-video-player/
sudo apt-get install rtmpdump mkfifo /tmp/livevideo rtmpdump -r rtmp://184.72.239.149/vod/BigBuckBunny_115k.mov --live -o /tmp/livevideo | omxplayer /tmp/livevideo