diff --git a/src/devede/executor.py b/src/devede/executor.py
index a10e07e..651bf58 100644
--- a/src/devede/executor.py
+++ b/src/devede/executor.py
@@ -52,7 +52,6 @@ class executor(GObject.GObject):
         self.handle = None
 
 
-
     def add_dependency(self, dep):
 
         self.add_dependency2(dep)
@@ -73,6 +72,7 @@ class executor(GObject.GObject):
         for child in self.childs:
             child.add_dependency(dep)
 
+
     def remove_dependency(self,process):
         # dependencies are removed only in the parent because the running class have all the processes, parents and childs, and calls
         # this method on all of them
@@ -86,6 +86,7 @@ class executor(GObject.GObject):
             else:
                 self.dependencies = None
 
+
     def add_child_process(self,child):
 
         # the childs have the same dependencies than the parent process because, from outside, it is viewed as a single process
@@ -96,16 +97,23 @@ class executor(GObject.GObject):
         if (self.childs.count(child) == 0):
             self.childs.append(child)
 
+
     def run(self, progress_bar):
 
         self.progress_bar = progress_bar
         self.progress_bar[0].set_label(self.text)
         self.progress_bar[1].set_fraction(0.0)
         self.progress_bar[0].show_all()
+        # call, if it exists, the pre-function
+        try:
+            self.pre_function()
+        except:
+            pass
         self.launch_process(self.command_var)
         if self.use_pulse_mode != self.pulse_mode:
             self.set_pulse_mode(self.use_pulse_mode)
 
+
     def remove_ansi(self,line):
 
         output=""
@@ -221,6 +229,7 @@ class executor(GObject.GObject):
             self.file_out.write(line_data)
             return True
 
+
     def read_stdin_from_file(self,source,condition):
 
         line_data = self.file_in.read1(4096)
@@ -265,7 +274,7 @@ class executor(GObject.GObject):
 
         if (condition != GLib.IO_IN):
             self.channel_stderr = None
-            if ((self.channel_stdout == None) and (self.channel_stdin == None)):
+            if (((self.channel_stdout == None) or (self.stdout_file != None)) and ((self.channel_stdin == None) or (self.stdin_file != None))):
                 self.wait_end()
             return False
         else:
@@ -286,6 +295,7 @@ class executor(GObject.GObject):
                 self.process_stderr(final_data)
             return True
 
+
     def cancel(self):
 
         """ Called to kill this process. """
@@ -306,6 +316,12 @@ class executor(GObject.GObject):
 
         self.set_pulse_mode(False)
 
+        # call, if it exists, the post-function
+        try:
+            self.post_function(retval,self.killed)
+        except:
+            pass
+
         if self.killed:
             retval = 0
         else:
diff --git a/src/devede/file_movie.py b/src/devede/file_movie.py
index e45bc8c..0361f75 100644
--- a/src/devede/file_movie.py
+++ b/src/devede/file_movie.py
@@ -24,7 +24,6 @@ import devede.converter
 import devede.ask_subtitles
 import devede.preview
 import devede.file_copy
-import devede.rename_file
 import devede.subtitles_mux
 
 class file_movie(devede.interface_manager.interface_manager):
@@ -405,7 +404,7 @@ class file_movie(devede.interface_manager.interface_manager):
         self.wtreview_subtitles = self.builder.get_object("treeview_subtitles")
         self.wdel_subtitles = self.builder.get_object("del_subtitles")
 
-        selection = self.wsubtitles_list.get_selection()
+        selection = self.wtreview_subtitles.get_selection()
         selection.set_mode(Gtk.SelectionMode.BROWSE)
 
         # elements in page VIDEO OPTIONS
@@ -578,11 +577,8 @@ class file_movie(devede.interface_manager.interface_manager):
                 duration2 = self.original_length
             else:
                 duration2 = duration
+            stream_id = 0
             for subt in self.subtitles_list:
-                renamer = devede.rename_file.rename_file()
-                renamer.rename(output_path, output_path+".tmp")
-                renamer.add_dependency(last_process)
-                converter.add_child_process(renamer)
                 subt_file = subt[0]
                 subt_codepage = subt[1]
                 subt_lang = subt[2]
@@ -592,11 +588,13 @@ class file_movie(devede.interface_manager.interface_manager):
                 else:
                     final_aspect = "4:3"
                 subt_mux = devede.subtitles_mux.subtitles_mux()
-                subt_mux.multiplex_subtitles( output_path+".tmp", output_path, subt_file, subt_codepage, subt_lang, subt_upper,
-                                                              self.subt_font_size,self.format_pal,self.force_subtitles, final_aspect, duration2)
-                subt_mux.add_dependency(renamer)
+                subt_mux.multiplex_subtitles( output_path, subt_file, subt_codepage, subt_lang, subt_upper,
+                                                              self.subt_font_size,self.format_pal,self.force_subtitles,
+                                                              final_aspect, duration2, stream_id)
+                subt_mux.add_dependency(last_process)
                 converter.add_child_process(subt_mux)
                 last_process = subt_mux
+                stream_id += 1
 
         return converter
 
diff --git a/src/devede/rename_file.py b/src/devede/rename_file.py
deleted file mode 100644
index 1ca1ca0..0000000
--- a/src/devede/rename_file.py
+++ /dev/null
@@ -1,48 +0,0 @@
-#!/usr/bin/env python3
-
-# Copyright 2014 (C) Raster Software Vigo (Sergio Costas)
-#
-# This file is part of DeVeDe-NG
-#
-# DeVeDe-NG is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 3 of the License, or
-# (at your option) any later version.
-#
-# DeVeDe-NG is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>
-
-import os
-import devede.configuration_data
-import devede.executor
-
-class rename_file(devede.executor.executor):
-
-    def __init__(self):
-
-        devede.executor.executor.__init__(self)
-        self.config = devede.configuration_data.configuration.get_config()
-
-    def rename(self,file_path_input, file_path_output):
-
-        self.text = _("Renaming %(L)s to %(X)s") % {"X": os.path.basename(file_path_output), "L": os.path.basename(file_path_input)}
-
-        self.command_var=[]
-        self.command_var.append("mv")
-        self.command_var.append("-f")
-        self.command_var.append(file_path_input)
-        self.command_var.append(file_path_output)
-        self.use_pulse_mode = True
-
-    def process_stdout(self,data):
-
-        return
-
-    def process_stderr(self,data):
-
-        return
\ No newline at end of file
diff --git a/src/devede/subtitles_mux.py b/src/devede/subtitles_mux.py
index 9e0623b..a2ecbed 100644
--- a/src/devede/subtitles_mux.py
+++ b/src/devede/subtitles_mux.py
@@ -18,6 +18,8 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>
 
 import os
+import subprocess
+
 import devede.configuration_data
 import devede.executor
 
@@ -28,13 +30,14 @@ class subtitles_mux(devede.executor.executor):
         devede.executor.executor.__init__(self)
         self.config = devede.configuration_data.configuration.get_config()
 
-    def multiplex_subtitles(self,file_path_input, file_path_output, subtitles_path,subt_codepage, subt_lang,
-                            subt_upper,font_size, pal, force_subtitles, aspect, duration):
+    def multiplex_subtitles(self, file_path, subtitles_path,subt_codepage, subt_lang,
+                            subt_upper,font_size, pal, force_subtitles, aspect, duration, stream_id):
 
+        self.subt_path = file_path
         self.duration = duration
-        self.text = _("Adding %(L)s subtitles to %(X)s") % {"X": os.path.basename(file_path_output), "L": subt_lang}
+        self.text = _("Adding %(L)s subtitles to %(X)s") % {"X": os.path.basename(file_path), "L": subt_lang}
 
-        out_xml = open(file_path_input+".xml","w")
+        out_xml = open(file_path+".xml","w")
         out_xml.write('<subpictures format="')
         if pal:
             out_xml.write('PAL')
@@ -69,9 +72,19 @@ class subtitles_mux(devede.executor.executor):
             mode = "svcd"
         self.command_var.append("-m")
         self.command_var.append(mode)
-        self.command_var.append(file_path_input+".xml")
-        self.stdin_file = file_path_input
-        self.stdout_file = file_path_output
+        self.command_var.append("-s")
+        self.command_var.append(str(stream_id))
+        self.command_var.append(file_path+".xml")
+        self.stdin_file = file_path+".tmp"
+        self.stdout_file = file_path
+
+
+    def pre_function(self):
+
+        final_path = self.subt_path+".tmp"
+        if os.path.exists(final_path):
+            os.remove(final_path)
+        os.rename(self.subt_path, final_path)
 
 
     def process_stderr(self,data):