video_changer.py

#!/usr/bin/env python
#-*- coding: utf-8 -*-
import subprocess
import wiringpi2
from time import sleep

# IO
OUTPUT = 1
INPUT = 0
HIGH = 1
LOW = 0
# pin number settings
BUTTON1 = 2
BUTTON2 = 3
BUTTON3 = 4

io = wiringpi2
io.wiringPiSetupGpio()

io.pinMode(BUTTON1,INPUT)
io.pinMode(BUTTON2,INPUT)
io.pinMode(BUTTON3,INPUT)

playProcess = None

def play_movie(file):
  print file
  cmd = "omxplayer " + file
  global playProcess
  if playProcess is not None:
    try:
      playProcess.stdin.write('q')
      playProcess.terminate()
      playProcess.wait()
    except EnvironmentError as e:
      print e
    else:
      playProcess = None
  playProcess = subprocess.Popen(cmd.strip().split(" "), stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE, close_fds=True)

while 1:
  if io.digitalRead(BUTTON1) == 0:
    play_movie('movie1.mov')
  if io.digitalRead(BUTTON2) == 0:
    play_movie('movie2.mov')
  if io.digitalRead(BUTTON3) == 0:
    play_movie('movie3.mov')
  sleep(.1)