default.py

import xbmc
import subprocess,os

xbmc.log(msg="***WORKING1***",level=xbmc.LOGDEBUG)
print("**Working1**")

class MyPlayer(xbmc.Player) :

        def __init__ (self):
                xbmc.Player.__init__(self)

        def onPlayBackStarted(self):
                if xbmc.Player().isPlayingVideo():
                        os.system("sudo python ~/.xbmc/addon/script.service.procmanager/resources/stopall.py") #Calls another script to stop proceses

        def onPlayBackEnded(self):
                if (VIDEO == 0): #If no video playing
                        os.system("sudo python ~/.xbmc/addon/script.service.procmanager/resources/startall.py") #Calls another script to start proceses

xbmc.log(msg="***WORKING2***",level=xbmc.LOGDEBUG)
print("**Working2**")


player=MyPlayer()

while(1): #Do this in order to know when video isn't playing
        if xbmc.Player().isPlayingVideo():
                VIDEO = 1

        else:
                VIDEO = 0

xbmc.sleep(3000) #Repeat (ms)