omxplayer.go: run omxplayer with priority -15

omxplayer.go

@@ -115,7 +115,6 @@ func getDbusConnection() (conn *dbus.Conn, err error) {
 		dbus.AuthExternal(user),
 		dbus.AuthCookieSha1(user, home),
 	}
-
 	log.Debug("omxplayer: opening dbus session")
 	if conn, err = dbus.SessionBusPrivate(); err != nil {
 		return
@@ -153,14 +152,16 @@ func setupDbusEnvironment() (err error) {
 	return
 }
 
+// Run omxplayer with high priority using "nice" shell command
 // execOmxplayer starts a new OMXPlayer process and tells it to pause the video
 // by passing a "p" on standard input.
 func execOmxplayer(url string, args ...string) (cmd *exec.Cmd, err error) {
 	log.Debug("omxplayer: starting omxplayer process")
 
 	args = append(args, url)
-
-	cmd = exec.Command(exeOxmPlayer, args...)
+	n_args := []string{"-n", "-15", exeOxmPlayer}
+	n_args = append(n_args, args...)
+	cmd = exec.Command("nice", n_args...)
 	err = cmd.Start()
 	return
 }