Question: how to install omxplayer on raspberry pi?
Answer: Installing. Omxplayer is included with the Rasbioan operating system, but if you need to install it you can use: sudo apt-get install omxplayer.
Resources. http://elinux.org/Omxplayer.
Key Bindings: ... 
Playing A RTSP Stream From An Axis Camera. ... 
Video Formats. ... 
Displaying Images. ... 
Playing Audio Files. ... 
Sending Audio To The HDMI Port.