diff --git a/sync_mpc.py b/sync_mpc.py
index e45c49f..57fc22e 100755
--- a/sync_mpc.py
+++ b/sync_mpc.py
@@ -1,32 +1,16 @@
 #coding:utf8
 import thread
-import sys, os
+import sys
 
 from twisted.internet import reactor
-
 from syncplay import client
 from syncplay.players import mpc
 
-def stdin_thread(sock):
-    try:
-        fd = sys.stdin.fileno()
-        while True:
-            data = os.read(fd, 1024)
-            if not data:
-                break   
-            sock.execute_command(data.rstrip('\n\r'))
-    except:
-        pass
+
+import common_functions
 
 if __name__ == '__main__':
-    args = sys.argv[1:]
-    host = args.pop(0) 
-    name = args.pop(0) 
-    if ':' in host:
-        host, port = host.split(':', 1)
-        port = int(port)
-    else:
-        port = 8999
+    host,port, name = common_functions.get_configuration()
     manager = client.Manager(host, port, name, lambda m: mpc.run_mpc(m))
-    thread.start_new_thread(stdin_thread, (manager,))
+    thread.start_new_thread(common_functions.stdin_thread, (manager,))
     manager.start()
diff --git a/sync_mplayer.py b/sync_mplayer.py
index 7a08cc2..c9e6cbe 100755
--- a/sync_mplayer.py
+++ b/sync_mplayer.py
@@ -1,12 +1,14 @@
 #coding:utf8
-
+import thread
 import sys
 
 from twisted.internet import reactor
-
 from syncplay import client
 from syncplay.players import mplayer
 
+
+import common_functions
+
 if __name__ == '__main__':
     args = sys.argv[1:]
     host = args.pop(0)
@@ -20,5 +22,6 @@ if __name__ == '__main__':
     args.extend(('-slave', '-msglevel', 'all=1:global=4'))
 
     manager = client.Manager(host, port, name, lambda m: mplayer.run_mplayer(m, 'mplayer', args))
+    thread.start_new_thread(common_functions.stdin_thread, (manager,))
     manager.start()
 
diff --git a/syncplay/client.py b/syncplay/client.py
index c8fc476..86df936 100644
--- a/syncplay/client.py
+++ b/syncplay/client.py
@@ -19,7 +19,6 @@ from .utils import (
 class SyncClientProtocol(CommandProtocol):
     def __init__(self, manager):
         CommandProtocol.__init__(self)
-
         self.manager = manager
 
     def connectionMade(self):
@@ -101,7 +100,6 @@ class SyncClientProtocol(CommandProtocol):
     def send_playing(self, filename):
         self.send_message('playing', filename)
 
-
     states = dict(
         init = dict(
             present = 'handle_init_present',
@@ -280,22 +278,33 @@ class Manager(object):
         if self.protocol and self.player_filename:
             self.protocol.send_playing(self.player_filename)
 
-    def execute_command(self, data):
-        RE_SEEK = re.compile("^s ?(\d+)?(:(\d{1,2}))?$")
-        m = RE_SEEK.match(data)
-        if m :
-            minutes, seconds = m.group(1), m.group(3)
-            if minutes <> None:
-                minutes = int(minutes) * 60
-            else:
-                minutes = 0
+    def exectue_seek_cmd(self, seek_type, minutes, seconds):
+        self.player_position_before_last_seek = self.player_position
+        if seek_type == 's':
+            self.counter += 1
             if seconds <> None:
                 seconds = int(seconds)
             else:
                 seconds = 0
-            self.player_position_before_last_seek = self.player_position
-            self.counter += 1
-            self.protocol.send_seek(self.counter, time.time(), minutes+seconds)
+            if minutes <> None:
+                seconds += int(minutes) * 60
+            self.protocol.send_seek(self.counter, time.time(), seconds)
+        else: #seek_type s+
+            if seconds <> None:
+                seconds = int(seconds)
+            else:
+                seconds = 20
+            if minutes <> None:
+                seconds += int(minutes) * 60
+            else:
+                seconds += 60
+            self.protocol.send_seek(self.counter, time.time(), self.player_position+seconds)
+
+    def execute_command(self, data):
+        RE_SEEK = re.compile("^(s[+s]?) ?(-?\d+)?([^0-9](\d+))?$")
+        matched_seek = RE_SEEK.match(data)
+        if matched_seek :
+            self.exectue_seek_cmd(matched_seek.group(1), matched_seek.group(2), matched_seek.group(4))
         elif data == "r":
             self.counter += 1
             tmp_pos = self.player_position