diff --git a/src/client/stream.c b/src/client/stream.c
index c632dbf32..020e336a5 100644
--- a/src/client/stream.c
+++ b/src/client/stream.c
@@ -869,7 +869,7 @@ on_stream_started (GObject      *source_object,
   gint fd_idx, fd;
   gchar *format;
   GError *error = NULL;
-  GVariant *result;
+  GVariant *result, *properties;
 
   result = g_dbus_proxy_call_with_unix_fd_list_finish (priv->source_output,
                                                        &out_fd_list,
@@ -879,18 +879,25 @@ on_stream_started (GObject      *source_object,
     goto start_failed;
 
   g_variant_get (result,
-                 "(hs)",
+                 "(hs@a{sv})",
                  &fd_idx,
-                 &format);
+                 &format,
+                 &properties);
 
   g_variant_unref (result);
 
   if (priv->format)
     g_bytes_unref (priv->format);
-  priv->format = g_bytes_new (format, strlen (format) + 1);
-
+  priv->format = g_bytes_new_take (format, strlen (format) + 1);
   g_object_notify (G_OBJECT (stream), "format");
 
+  if (priv->properties)
+    pinos_properties_free (priv->properties);
+  priv->properties = pinos_properties_from_variant (properties);
+  g_variant_unref (properties);
+
+  g_object_notify (G_OBJECT (stream), "properties");
+
   if ((fd = g_unix_fd_list_get (out_fd_list, fd_idx, &error)) < 0)
     goto fd_failed;
 
diff --git a/src/dbus/org.pinos.xml b/src/dbus/org.pinos.xml
index 783341760..8cd5573b5 100644
--- a/src/dbus/org.pinos.xml
+++ b/src/dbus/org.pinos.xml
@@ -143,16 +143,19 @@
          @requested_format: requested formats
          @fd: output file descriptor
          @format: output format
+         @properties: output properties
 
          Start the datatransfer of the source with @requested_format.
 
          The result is a file descriptor that can be used to get metadata
-         and media. @format contains the final media format.
+         and media. @format contains the final media format and @properties
+         the extra properties that describe the media format.
     -->
     <method name='Start'>
       <arg type='s' name='requested_format' direction='in'/>
       <arg type='h' name='fd' direction='out'/>
       <arg type='s' name='format' direction='out'/>
+      <arg type='a{sv}' name='properties' direction='out'/>
     </method>
     <!-- Stop:
 
diff --git a/src/server/source-output.c b/src/server/source-output.c
index e4b67aa8b..f9657d5fb 100644
--- a/src/server/source-output.c
+++ b/src/server/source-output.c
@@ -215,9 +215,10 @@ handle_start (PinosSourceOutput1     *interface,
   g_unix_fd_list_append (fdlist, fd[1], NULL);
 
   g_dbus_method_invocation_return_value_with_unix_fd_list (invocation,
-           g_variant_new ("(hs)",
+           g_variant_new ("(hs@a{sv})",
                           0,
-                          g_bytes_get_data (priv->format, NULL)),
+                          g_bytes_get_data (priv->format, NULL),
+                          pinos_properties_to_variant (priv->properties)),
            fdlist);
 
   g_object_set (priv->iface,