Raspberry Pi media player for BlackMagic ATEM

This project is to create a video player using the raspberry pi, for the ATEM Vision switcher. The video files can be played by OMXPLAYER. Using 4 gpio pins as button inputs, 'Previous' 'Stop' 'Play' 'Next'. Video names should be displayed in white text on a black background as large as possible, one at a time. When the next or previous button is pushed, the next or previous file name will be displayed. If Play is pushed, it plays file, Stop stops. The play command can also be invoked if tally information from ATEM is 'ONAIR' for that input. Go to [login to view URL] look at ATEM vision switchers. There is a SDK, ive attached. bmdSwitcherInputPropertyldlsProgramTallied is what we're interested in monitoring. A ATEM vision switcher has a number of inputs. From 6 - 20. So we will wait for a input to be on 'onair', and play when true.