diff --git a/Makefile.am b/Makefile.am
index 2e466cb2a3..6b47db2fab 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,4 +1,4 @@
-SUBDIRS = sources doc
+SUBDIRS = sources sources/glue doc
 
 pkgconfigdir = $(libdir)/pkgconfig
 pkgconfig_DATA = gst-sharp-1.0.pc
diff --git a/configure.ac b/configure.ac
index 578be864ea..ef9551eb49 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4,6 +4,7 @@ AC_CANONICAL_TARGET
 AM_INIT_AUTOMAKE
 AM_MAINTAINER_MODE
 AC_PROG_INSTALL
+LT_INIT
 
 dnl Package settings
 ASSEMBLY_COMPANY=""
@@ -133,12 +134,15 @@ dnl Check for Gst
 PKG_CHECK_MODULES(GST, gstreamer-1.0)
 gst_prefix=/usr
 AC_SUBST(gst_prefix)
+AC_SUBST(GST_LIBS)
+AC_SUBST(GST_CFLAGS)
 
 
 
 AC_CONFIG_FILES([
 	Makefile
 	sources/Makefile
+	sources/glue/Makefile
 	sources/AssemblyInfo.cs
 	gst-sharp-1.0.pc
 	doc/Makefile
diff --git a/out/gst-sharp.dll.config b/out/gst-sharp.dll.config
index 6a151fb4c2..44d4aa909c 100644
--- a/out/gst-sharp.dll.config
+++ b/out/gst-sharp.dll.config
@@ -1,3 +1,6 @@
 <configuration>
   <dllmap dll="gstreamer-1.0" target="libgstreamer-1.0.so.0"/>
+  <dllmap dll="libglib-2.0-0.dll" target="libglib-2.0.so.0"/>
+  <dllmap dll="libgobject-2.0-0.dll" target="libgobject-2.0.so.0"/>
+  <dllmap dll="libgthread-2.0-0.dll" target="libgthread-2.0.so.0"/>
 </configuration>
diff --git a/sources/Makefile.am b/sources/Makefile.am
index 13de6e11da..bc3884b806 100644
--- a/sources/Makefile.am
+++ b/sources/Makefile.am
@@ -3,6 +3,7 @@ API = $(ASSEMBLY_NAME)-api.xml
 METADATA = $(ASSEMBLY_NAME).metadata
 DLL = $(top_srcdir)/out/$(ASSEMBLY_NAME).dll
 DLLMAP = $(top_srcdir)/out/$(ASSEMBLY_NAME).dll.config
+GLUEDIR = $(srcdir)/glue
 
 sources = custom/*.cs
 
@@ -31,6 +32,8 @@ $(API): $(srcdir)/$(RAW_API) $(srcdir)/$(METADATA)
 generated-stamp: $(API)
 	 $(GAPI_CODEGEN) --generate $(srcdir)/$(API) $(GTK_SHARP_CFLAGS) \
 		--outdir=generated \
+		--glue-filename=$(GLUEDIR)/generated.c --gluelib-name=libgstsharpglue-1.0.6.so \
+		--glue-includes=gst/gst.h \
 	 	--assembly-name=$(ASSEMBLY_NAME) && touch generated-stamp
 
 $(DLL): $(build_sources) generated-stamp
diff --git a/sources/custom/DynamicSignal.cs b/sources/custom/DynamicSignal.cs
new file mode 100644
index 0000000000..557b13f9d6
--- /dev/null
+++ b/sources/custom/DynamicSignal.cs
@@ -0,0 +1,429 @@
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+//
+// This library 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
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+//
+//
+// Copyright (C) 2006 Novell Inc.
+// Copyright (C) 2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
+// Copyright (C) 2013 Stephan Sundermann <stephansundermann@gmail.com>
+//
+// This class implements functions to bind callbacks to GObject signals
+// dynamically and to emit signals dynamically.
+//
+//
+
+using GLib;
+using System;
+using System.Reflection;
+using System.Runtime.InteropServices;
+using System.Collections;
+
+namespace Gst {
+
+  delegate void GClosureMarshal (IntPtr closure, ref GLib.Value retval, uint argc, IntPtr argsPtr,
+                                 IntPtr invocation_hint, IntPtr data);
+
+  public delegate void SignalHandler (object o, SignalArgs args);
+
+  public static class DynamicSignal {
+
+    private static readonly int gvalue_struct_size = Marshal.SizeOf (typeof (GLib.Value));
+
+    class ObjectSignalKey {
+      object o;
+      string signal_name;
+
+      public ObjectSignalKey (object o, string name) {
+        this.o = o;
+        signal_name = name;
+      }
+
+      public override bool Equals (object o) {
+        if (o is ObjectSignalKey) {
+          ObjectSignalKey k = (ObjectSignalKey) o;
+          return k.o.Equals (this.o) && signal_name.Equals (k.signal_name);
+        }
+        return base.Equals (o);
+      }
+
+      public override int GetHashCode() {
+        return o.GetHashCode() ^ signal_name.GetHashCode();
+      }
+    }
+
+    class SignalInfo {
+      uint handlerId;
+      IntPtr closure;
+      Delegate registeredHandler;
+      Type argsType;
+
+      public IntPtr Closure {
+        get {
+          return closure;
+        } set {
+          closure = value;
+        }
+      }
+
+      public uint HandlerId {
+        get {
+          return handlerId;
+        } set {
+          handlerId = value;
+        }
+      }
+
+      public Delegate RegisteredHandler {
+        get {
+          return registeredHandler;
+        } set {
+          registeredHandler = value;
+        }
+      }
+
+      public Type ArgsType {
+        get {
+          return argsType;
+        } set {
+          argsType = value;
+        }
+      }
+
+      public SignalInfo (uint handlerId, IntPtr closure, Delegate registeredHandler) {
+        this.handlerId = handlerId;
+        this.closure = closure;
+        this.registeredHandler = registeredHandler;
+
+        if (!IsValidDelegate (registeredHandler))
+          throw new Exception ("Invalid delegate");
+
+        MethodInfo mi = registeredHandler.Method;
+        ParameterInfo[] parms = mi.GetParameters ();
+        this.argsType = parms[1].ParameterType;
+      }
+
+      public void UpdateArgsType (Delegate d) {
+        if (!IsCompatibleDelegate (d))
+          throw new Exception ("Incompatible delegate");
+
+        MethodInfo mi = d.Method;
+        ParameterInfo[] parms = mi.GetParameters ();
+
+        Type t1 = parms[1].ParameterType;
+        Type t2 = argsType;
+
+        if (t1 == t2)
+          return;
+
+        if (t1.IsSubclassOf (t2))
+          argsType = t1;
+        else if (t2.IsSubclassOf (t1))
+          argsType = t2;
+        else
+          throw new Exception ("Incompatible delegate");
+      }
+
+      public bool IsCompatibleDelegate (Delegate d) {
+        if (!IsValidDelegate (d))
+          return false;
+
+        MethodInfo mi = d.Method;
+        ParameterInfo[] parms = mi.GetParameters ();
+
+        if (parms[1].ParameterType != this.argsType &&
+            !parms[1].ParameterType.IsSubclassOf (this.argsType) &&
+            !this.argsType.IsSubclassOf (parms[1].ParameterType))
+          return false;
+
+        return true;
+      }
+
+      public static bool IsValidDelegate (Delegate d) {
+        MethodInfo mi = d.Method;
+
+        if (mi.ReturnType != typeof (void))
+          return false;
+
+        ParameterInfo[] parms = mi.GetParameters ();
+        if (parms.Length != 2)
+          return false;
+
+        if (parms[1].ParameterType != typeof (GLib.SignalArgs) &&
+            !parms[1].ParameterType.IsSubclassOf (typeof (GLib.SignalArgs)))
+          return false;
+
+        return true;
+      }
+    }
+
+    static Hashtable SignalHandlers = new Hashtable();
+
+    static GClosureMarshal marshalHandler = new GClosureMarshal (OnMarshal);
+
+    public static void Connect (GLib.Object o, string name, SignalHandler handler) {
+      Connect (o, name, false, (Delegate) handler);
+    }
+
+    public static void Connect (GLib.Object o, string name,
+                                bool after, SignalHandler handler) {
+      Connect (o, name, after, (Delegate) handler);
+    }
+
+    public static void Connect (GLib.Object o, string name, Delegate handler) {
+      Connect (o, name, false, handler);
+    }
+
+    static int g_closure_sizeof = gstsharp_g_closure_sizeof ();
+
+    public static void Connect (GLib.Object o, string name,
+                                bool after, Delegate handler) {
+      Delegate newHandler;
+
+      ObjectSignalKey k = new ObjectSignalKey (o, name);
+
+      if (!SignalInfo.IsValidDelegate (handler))
+        throw new Exception ("Invalid delegate");
+
+      if (SignalHandlers[k] != null) {
+        SignalInfo si = (SignalInfo) SignalHandlers[k];
+        if (!si.IsCompatibleDelegate (handler))
+          throw new Exception ("Incompatible delegate");
+
+        newHandler = Delegate.Combine (si.RegisteredHandler, handler);
+        si.UpdateArgsType (handler);
+        si.RegisteredHandler = newHandler;
+      } else {
+        if (!SignalInfo.IsValidDelegate (handler))
+          throw new Exception ("Invalid delegate");
+
+        IntPtr closure = g_closure_new_simple (g_closure_sizeof, IntPtr.Zero);
+        g_closure_set_meta_marshal (closure, (IntPtr) GCHandle.Alloc (k),  marshalHandler);
+        uint signalId = g_signal_connect_closure (o.Handle, name, closure, after);
+        SignalHandlers.Add (k, new SignalInfo (signalId, closure, handler));
+      }
+    }
+
+    [DllImport ("libgstsharpglue-1.0.6.dll") ]
+    static extern int gstsharp_g_closure_sizeof ();
+
+    public static void Disconnect (GLib.Object o, string name, Delegate handler) {
+      ObjectSignalKey k = new ObjectSignalKey (o, name);
+      if (SignalHandlers[k] != null) {
+        SignalInfo si = (SignalInfo) SignalHandlers[k];
+        Delegate newHandler = Delegate.Remove (si.RegisteredHandler, handler);
+        if (newHandler == null || handler == null) {
+          g_signal_handler_disconnect (o.Handle, si.HandlerId);
+          SignalHandlers.Remove (k);
+        } else {
+          si.RegisteredHandler = newHandler;
+        }
+      }
+    }
+
+    static void OnMarshal (IntPtr closure, ref GLib.Value retval, uint argc, IntPtr argsPtr,
+                           IntPtr ihint, IntPtr data) {
+      object [] args = new object[argc - 1];
+      object o = ( (GLib.Value) Marshal.PtrToStructure (argsPtr, typeof (GLib.Value))).Val;
+
+      for (int i = 1; i < argc; i++) {
+        IntPtr struct_ptr = (IntPtr) ( (long) argsPtr + (i * gvalue_struct_size));
+        GLib.Value argument = (GLib.Value) Marshal.PtrToStructure (struct_ptr, typeof (GLib.Value));
+        args[i - 1] = argument.Val;
+      }
+
+      if (data == IntPtr.Zero) {
+        Console.Error.WriteLine ("No available data");
+        return;
+      }
+
+      ObjectSignalKey k = (ObjectSignalKey) ( (GCHandle) data).Target;
+      if (k != null) {
+        SignalInfo si = (SignalInfo) SignalHandlers[k];
+        GLib.SignalArgs arg = (GLib.SignalArgs) Activator.CreateInstance (si.ArgsType);
+        arg.Args = args;
+        si.RegisteredHandler.DynamicInvoke (new object[] {o, arg});
+        if (arg.RetVal != null) {
+          retval.Val = arg.RetVal;
+        }
+      }
+    }
+
+
+    [DllImport ("libgobject-2.0-0.dll") ]
+    static extern IntPtr g_closure_new_simple (int size, IntPtr data);
+
+    [DllImport ("libgobject-2.0-0.dll") ]
+    static extern uint g_signal_connect_closure (IntPtr instance,
+        string name, IntPtr closure, bool after);
+
+    [DllImport ("libgobject-2.0-0.dll") ]
+    static extern void g_closure_set_meta_marshal (IntPtr closure, IntPtr data, GClosureMarshal marshal);
+
+    class GTypeSignalKey {
+      GType type;
+      string signal_name;
+
+      public GTypeSignalKey (GType type, string name) {
+        this.type = type;
+        signal_name = name;
+      }
+
+      public override bool Equals (object o) {
+        if (o is GTypeSignalKey) {
+          GTypeSignalKey k = (GTypeSignalKey) o;
+          return k.type.Equals (this.type) && signal_name.Equals (k.signal_name);
+        }
+        return base.Equals (o);
+      }
+
+      public override int GetHashCode() {
+        return type.GetHashCode() ^ signal_name.GetHashCode();
+      }
+    }
+
+    struct SignalQuery {
+      public uint signal_id;
+      public string signal_name;
+      public GType itype;
+      public uint signal_flags;
+      public GType return_type;
+      public uint n_params;
+      public Type[] param_types;
+    }
+
+    static Hashtable SignalEmitInfo = new Hashtable ();
+
+    public static object Emit (GLib.Object o, string name, params object[] parameters) {
+      SignalQuery query;
+      IntPtr type = gstsharp_g_type_from_instance (o.Handle);
+      GType gtype = new GType (type);
+      string signal_name, signal_detail;
+      uint signal_detail_quark = 0;
+      int colon;
+
+      colon = name.LastIndexOf ("::");
+
+      if (colon == -1) {
+        signal_name = name;
+        signal_detail = String.Empty;
+      } else {
+        signal_name = name.Substring (0, colon);
+        signal_detail = name.Substring (colon + 2);
+      }
+
+      GTypeSignalKey key = new GTypeSignalKey (gtype, signal_name);
+
+      if (SignalEmitInfo[key] == null) {
+        IntPtr native_string = GLib.Marshaller.StringToPtrGStrdup (signal_name);
+        uint signal_id = g_signal_lookup (native_string, type);
+        GLib.Marshaller.Free (native_string);
+
+        if (signal_id == 0)
+          throw new NotSupportedException (String.Format ("{0} has no signal of name {1}", o, name));
+        GSignalQuery q = new GSignalQuery ();
+        g_signal_query (signal_id, ref q);
+
+        if (q.signal_id == 0)
+          throw new NotSupportedException (String.Format ("{0} couldn't be queried for signal with name {1}", o, name));
+
+        query = new SignalQuery ();
+
+        query.signal_id = signal_id;
+        query.signal_name = GLib.Marshaller.Utf8PtrToString (q.signal_name);
+        query.itype = new GType (q.itype);
+        query.signal_flags = q.signal_flags;
+        query.return_type = new GType (q.return_type);
+        query.n_params = q.n_params;
+        query.param_types = new Type[q.n_params];
+
+        for (int i = 0; i < query.n_params; i++) {
+          IntPtr t = Marshal.ReadIntPtr (q.param_types, i);
+          GType g = new GType (t);
+
+          query.param_types[i] = (Type) g;
+        }
+
+        SignalEmitInfo.Add (key, query);
+      }
+
+      query = (SignalQuery) SignalEmitInfo[key];
+      GLib.Value[] signal_parameters = new GLib.Value[query.n_params + 1];
+      signal_parameters[0] = new GLib.Value (o);
+
+      if (parameters.Length != query.n_params)
+        throw new ApplicationException (String.Format ("Invalid number of parameters: expected {0}, got {1}", query.n_params, parameters.Length));
+
+      for (int i = 0; i < query.n_params; i++) {
+        Type expected_type = (Type) query.param_types[i];
+        Type given_type = parameters[i].GetType ();
+
+        if (expected_type != given_type && ! given_type.IsSubclassOf (given_type))
+          throw new ApplicationException (String.Format ("Invalid parameter type: expected {0}, got {1}", expected_type, given_type));
+
+        signal_parameters[i + 1] = new GLib.Value (parameters[i]);
+      }
+
+      GLib.Value return_value = new GLib.Value ();
+      if (query.return_type != GType.Invalid && query.return_type != GType.None)
+        return_value.Init (query.return_type);
+
+      if (signal_detail != String.Empty) {
+        IntPtr native_string = GLib.Marshaller.StringToPtrGStrdup (signal_detail);
+        signal_detail_quark = g_quark_from_string (native_string);
+        GLib.Marshaller.Free (native_string);
+      }
+
+      g_signal_emitv (signal_parameters, query.signal_id, signal_detail_quark, ref return_value);
+
+      foreach (GLib.Value v in signal_parameters)
+        v.Dispose ();
+
+      object ret = (query.return_type != GType.Invalid && query.return_type != GType.None) ? return_value.Val : null;
+
+      if (ret != null)
+        return_value.Dispose ();
+
+      return ret;
+    }
+
+    [DllImport ("libgstsharpglue-1\t.0.6.so") ]
+    static extern IntPtr gstsharp_g_type_from_instance (IntPtr o);
+
+    [DllImport ("libgobject-2.0-0.dll") ]
+    static extern int g_signal_handler_disconnect (IntPtr o, uint handler_id);
+
+    [DllImport ("libgobject-2.0-0.dll") ]
+    static extern uint g_signal_lookup (IntPtr name, IntPtr itype);
+
+    [DllImport ("libglib-2.0-0.dll") ]
+    static extern uint g_quark_from_string (IntPtr str);
+
+    [DllImport ("libgobject-2.0-0.dll") ]
+    static extern void g_signal_emitv (GLib.Value[] parameters, uint signal_id, uint detail, ref GLib.Value return_value);
+
+    [StructLayout (LayoutKind.Sequential) ]
+    struct GSignalQuery {
+      public uint signal_id;
+      public IntPtr signal_name;
+      public IntPtr itype;
+      public uint signal_flags;
+      public IntPtr return_type;
+      public uint n_params;
+      public IntPtr param_types;
+    }
+
+    [DllImport ("libgobject-2.0-0.dll") ]
+    static extern void g_signal_query (uint signal_id, ref GSignalQuery query);
+  }
+}
\ No newline at end of file
diff --git a/sources/custom/Object.cs b/sources/custom/Object.cs
new file mode 100644
index 0000000000..43ab287b8c
--- /dev/null
+++ b/sources/custom/Object.cs
@@ -0,0 +1,56 @@
+// Copyright (C) 2013  Stephan Sundermann <stephansundermann@gmail.com>
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program 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 Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+namespace Gst {
+	using System;
+	using System.Runtime.InteropServices;
+
+	partial class Object 
+	{
+		public object this[string property] {
+		  get {
+		    GLib.Value v = GetProperty (property);
+		    object o = v.Val;
+		    v.Dispose ();
+		    return o;
+		  } set {
+		    GLib.Value v = new GLib.Value (this, property);
+		    v.Val = value;
+		    SetProperty (property, v);
+		    v.Dispose ();
+		  }
+		}
+
+		public void Connect (string signal, SignalHandler handler) {
+		  DynamicSignal.Connect (this, signal, handler);
+		}
+
+		public void Disconnect (string signal, SignalHandler handler) {
+		  DynamicSignal.Disconnect (this, signal, handler);
+		}
+
+		public void Connect (string signal, Delegate handler) {
+		  DynamicSignal.Connect (this, signal, handler);
+		}
+
+		public void Disconnect (string signal, Delegate handler) {
+		  DynamicSignal.Disconnect (this, signal, handler);
+		}
+
+		public object Emit (string signal, params object[] parameters) {
+		  return DynamicSignal.Emit (this, signal, parameters);
+		}
+	}
+}
\ No newline at end of file
diff --git a/sources/glue/Makefile.am b/sources/glue/Makefile.am
new file mode 100644
index 0000000000..eb12645d94
--- /dev/null
+++ b/sources/glue/Makefile.am
@@ -0,0 +1,18 @@
+lib_LTLIBRARIES = libgstsharpglue-1.0.6.la
+# TODO: Select all files except generated.c dynamically
+libgstsharpglue_1_0_6_la_SOURCES = gobject.c
+
+nodist_libgstsharpglue_1_0_6_la_SOURCES = generated.c
+
+libgstsharpglue_1_0_6_la_LDFLAGS = -module -avoid-version -no-undefined
+
+libgstsharpglue_1_0_6_la_LIBADD = $(GST_LIBS)
+
+INCLUDES = $(GST_CFLAGS) -I$(top_srcdir)
+
+libgstsharpglue.dll: $(libgstsharpglue_1_0_6_la_OBJECTS) libgstsharpglue.rc libgstsharpglue.def
+	./build-dll libgstsharpglue $(VERSION)
+
+CLEANFILES = lib*.a lib*.dll
+
+EXTRA_DIST =
diff --git a/sources/glue/gobject.c b/sources/glue/gobject.c
new file mode 100644
index 0000000000..ccec825455
--- /dev/null
+++ b/sources/glue/gobject.c
@@ -0,0 +1,28 @@
+// Copyright (C) 2013  Stephan Sundermann <stephansundermann@gmail.com>
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program 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 Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#include <glib-object.h>
+
+gint
+gstsharp_g_closure_sizeof (void)
+{
+  return sizeof (GClosure);
+}
+
+GType
+gstsharp_g_type_from_instance (GTypeInstance * instance)
+{
+  return G_TYPE_FROM_INSTANCE (instance);
+}
diff --git a/sources/gst-sharp-api.raw b/sources/gst-sharp-api.raw
index 98b34a9a79..7d3034e20a 100644
--- a/sources/gst-sharp-api.raw
+++ b/sources/gst-sharp-api.raw
@@ -665,8 +665,8 @@
         <return-type type="gboolean"/>
         <parameters>
           <parameter name="name" type="const-gchar*"/>
-          <parameter name="target" type="GObject*" owned="true" pass_as="out"/>
-          <parameter name="pspec" type="GParamSpec*" pass_as="out"/>
+          <parameter allow-none="1" name="target" type="GObject*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="pspec" type="GParamSpec*" pass_as="out"/>
         </parameters>
       </method>
       <method name="SetProperty" cname="gst_child_proxy_set_property">
@@ -890,7 +890,7 @@
       <method name="SetToc" cname="gst_toc_setter_set_toc">
         <return-type type="void"/>
         <parameters>
-          <parameter name="toc" type="GstToc*">
+          <parameter allow-none="1" name="toc" type="GstToc*">
             <warning>missing glib:type-name</warning>
           </parameter>
         </parameters>
@@ -983,7 +983,7 @@
         </return-type>
         <parameters>
           <parameter name="size" type="gsize"/>
-          <parameter name="params" type="GstAllocationParams*">
+          <parameter allow-none="1" name="params" type="GstAllocationParams*">
             <warning>missing glib:type-name</warning>
           </parameter>
         </parameters>
@@ -1002,7 +1002,7 @@
         </return-type>
         <parameters>
           <parameter name="size" type="gsize"/>
-          <parameter name="params" type="GstAllocationParams*">
+          <parameter allow-none="1" name="params" type="GstAllocationParams*">
             <warning>missing glib:type-name</warning>
           </parameter>
         </parameters>
@@ -1248,12 +1248,12 @@
           <parameter name="config" type="GstStructure*">
             <warning>missing glib:type-name</warning>
           </parameter>
-          <parameter name="caps" type="GstCaps**" pass_as="out">
+          <parameter allow-none="1" name="caps" type="GstCaps**" pass_as="out">
             <warning>missing glib:type-name</warning>
           </parameter>
-          <parameter name="size" type="guint*" owned="true" pass_as="out"/>
-          <parameter name="min_buffers" type="guint*" owned="true" pass_as="out"/>
-          <parameter name="max_buffers" type="guint*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="size" type="guint*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="min_buffers" type="guint*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="max_buffers" type="guint*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ConfigHasOption" cname="gst_buffer_pool_config_has_option" shared="true">
@@ -1305,7 +1305,7 @@
           <parameter name="buffer" type="GstBuffer**" owned="true" pass_as="out">
             <warning>missing glib:type-name</warning>
           </parameter>
-          <parameter name="params" type="GstBufferPoolAcquireParams*">
+          <parameter allow-none="1" name="params" type="GstBufferPoolAcquireParams*">
             <warning>missing glib:type-name</warning>
           </parameter>
         </parameters>
@@ -1371,7 +1371,7 @@
           <parameter name="buffer" type="GstBuffer**" owned="true" pass_as="out">
             <warning>missing glib:type-name</warning>
           </parameter>
-          <parameter name="params" type="GstBufferPoolAcquireParams*">
+          <parameter allow-none="1" name="params" type="GstBufferPoolAcquireParams*">
             <warning>missing glib:type-name</warning>
           </parameter>
         </parameters>
@@ -1534,7 +1534,7 @@
       <method name="SetSyncHandler" cname="gst_bus_set_sync_handler">
         <return-type type="void"/>
         <parameters>
-          <parameter closure="1" destroy="2" scope="notified" name="func" type="GstBusSyncHandler"/>
+          <parameter closure="1" destroy="2" scope="notified" allow-none="1" name="func" type="GstBusSyncHandler"/>
           <parameter name="user_data" type="gpointer"/>
           <parameter scope="async" name="notify" type="GDestroyNotify"/>
         </parameters>
@@ -1639,7 +1639,7 @@
         <return-type type="GstClockReturn"/>
         <parameters>
           <parameter name="id" type="gpointer"/>
-          <parameter name="jitter" type="gint64" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="jitter" type="gint64" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="IdWaitAsync" cname="gst_clock_id_wait_async" shared="true">
@@ -1708,10 +1708,10 @@
       <method name="GetCalibration" cname="gst_clock_get_calibration">
         <return-type type="void"/>
         <parameters>
-          <parameter name="internal" type="guint64" owned="true" pass_as="out"/>
-          <parameter name="external" type="guint64" owned="true" pass_as="out"/>
-          <parameter name="rate_num" type="guint64" owned="true" pass_as="out"/>
-          <parameter name="rate_denom" type="guint64" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="internal" type="guint64" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="external" type="guint64" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="rate_num" type="guint64" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="rate_denom" type="guint64" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="GetInternalTime" cname="gst_clock_get_internal_time">
@@ -1767,7 +1767,7 @@
       <method name="SetMaster" cname="gst_clock_set_master">
         <return-type type="gboolean"/>
         <parameters>
-          <parameter name="master" type="GstClock*"/>
+          <parameter allow-none="1" name="master" type="GstClock*"/>
         </parameters>
       </method>
       <method name="SetResolution" cname="gst_clock_set_resolution">
@@ -2029,14 +2029,14 @@
         <parameters throws="1">
           <parameter name="type" type="GstURIType"/>
           <parameter name="uri" type="const-gchar*"/>
-          <parameter name="elementname" type="const-gchar*"/>
+          <parameter allow-none="1" name="elementname" type="const-gchar*"/>
           <parameter name="error" type="GError**"/>
         </parameters>
       </method>
       <method name="Register" cname="gst_element_register" shared="true">
         <return-type type="gboolean"/>
         <parameters>
-          <parameter name="plugin" type="GstPlugin*"/>
+          <parameter allow-none="1" name="plugin" type="GstPlugin*"/>
           <parameter name="name" type="const-gchar*"/>
           <parameter name="rank" type="guint"/>
           <parameter name="type" type="GType"/>
@@ -2063,8 +2063,8 @@
       <virtual_method name="GetState" cname="get_state">
         <return-type type="GstStateChangeReturn"/>
         <parameters>
-          <parameter name="state" type="GstState" owned="true" pass_as="out"/>
-          <parameter name="pending" type="GstState" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="state" type="GstState" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="pending" type="GstState" owned="true" pass_as="out"/>
           <parameter name="timeout" type="guint64"/>
         </parameters>
       </virtual_method>
@@ -2180,7 +2180,7 @@
         <return-type type="GstPad*" owned="true"/>
         <parameters>
           <parameter name="pad" type="GstPad*"/>
-          <parameter name="caps" type="GstCaps*">
+          <parameter allow-none="1" name="caps" type="GstCaps*">
             <warning>missing glib:type-name</warning>
           </parameter>
         </parameters>
@@ -2208,8 +2208,8 @@
       <method name="GetState" cname="gst_element_get_state">
         <return-type type="GstStateChangeReturn"/>
         <parameters>
-          <parameter name="state" type="GstState" owned="true" pass_as="out"/>
-          <parameter name="pending" type="GstState" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="state" type="GstState" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="pending" type="GstState" owned="true" pass_as="out"/>
           <parameter name="timeout" type="guint64"/>
         </parameters>
       </method>
@@ -2251,7 +2251,7 @@
         <return-type type="gboolean"/>
         <parameters>
           <parameter name="dest" type="GstElement*"/>
-          <parameter name="filter" type="GstCaps*">
+          <parameter allow-none="1" name="filter" type="GstCaps*">
             <warning>missing glib:type-name</warning>
           </parameter>
         </parameters>
@@ -2259,18 +2259,18 @@
       <method name="LinkPads" cname="gst_element_link_pads">
         <return-type type="gboolean"/>
         <parameters>
-          <parameter name="srcpadname" type="const-gchar*"/>
+          <parameter allow-none="1" name="srcpadname" type="const-gchar*"/>
           <parameter name="dest" type="GstElement*"/>
-          <parameter name="destpadname" type="const-gchar*"/>
+          <parameter allow-none="1" name="destpadname" type="const-gchar*"/>
         </parameters>
       </method>
       <method name="LinkPadsFiltered" cname="gst_element_link_pads_filtered">
         <return-type type="gboolean"/>
         <parameters>
-          <parameter name="srcpadname" type="const-gchar*"/>
+          <parameter allow-none="1" name="srcpadname" type="const-gchar*"/>
           <parameter name="dest" type="GstElement*"/>
-          <parameter name="destpadname" type="const-gchar*"/>
-          <parameter name="filter" type="GstCaps*">
+          <parameter allow-none="1" name="destpadname" type="const-gchar*"/>
+          <parameter allow-none="1" name="filter" type="GstCaps*">
             <warning>missing glib:type-name</warning>
           </parameter>
         </parameters>
@@ -2278,9 +2278,9 @@
       <method name="LinkPadsFull" cname="gst_element_link_pads_full">
         <return-type type="gboolean"/>
         <parameters>
-          <parameter name="srcpadname" type="const-gchar*"/>
+          <parameter allow-none="1" name="srcpadname" type="const-gchar*"/>
           <parameter name="dest" type="GstElement*"/>
-          <parameter name="destpadname" type="const-gchar*"/>
+          <parameter allow-none="1" name="destpadname" type="const-gchar*"/>
           <parameter name="flags" type="GstPadLinkCheck"/>
         </parameters>
       </method>
@@ -2294,8 +2294,8 @@
           <parameter name="type" type="GstMessageType"/>
           <parameter name="domain" type="guint32"/>
           <parameter name="code" type="gint"/>
-          <parameter name="text" type="gchar*" owned="true"/>
-          <parameter name="debug" type="gchar*" owned="true"/>
+          <parameter allow-none="1" name="text" type="gchar*" owned="true"/>
+          <parameter allow-none="1" name="debug" type="gchar*" owned="true"/>
           <parameter name="file" type="const-gchar*"/>
           <parameter name="function" type="const-gchar*"/>
           <parameter name="line" type="gint"/>
@@ -2341,7 +2341,7 @@
         <return-type type="gboolean"/>
         <parameters>
           <parameter name="format" type="GstFormat"/>
-          <parameter name="cur" type="gint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="cur" type="gint64*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ReleaseRequestPad" cname="gst_element_release_request_pad">
@@ -2360,8 +2360,8 @@
         <return-type type="GstPad*" owned="true"/>
         <parameters>
           <parameter name="templ" type="GstPadTemplate*"/>
-          <parameter name="name" type="const-gchar*"/>
-          <parameter name="caps" type="GstCaps*">
+          <parameter allow-none="1" name="name" type="const-gchar*"/>
+          <parameter allow-none="1" name="caps" type="GstCaps*">
             <warning>missing glib:type-name</warning>
           </parameter>
         </parameters>
@@ -2523,7 +2523,7 @@
         <return-type type="GstElement*"/>
         <parameters>
           <parameter name="factoryname" type="const-gchar*"/>
-          <parameter name="name" type="const-gchar*"/>
+          <parameter allow-none="1" name="name" type="const-gchar*"/>
         </parameters>
       </method>
       <method name="CanSinkAllCaps" cname="gst_element_factory_can_sink_all_caps">
@@ -2561,7 +2561,7 @@
       <method name="Create" cname="gst_element_factory_create">
         <return-type type="GstElement*"/>
         <parameters>
-          <parameter name="name" type="const-gchar*"/>
+          <parameter allow-none="1" name="name" type="const-gchar*"/>
         </parameters>
       </method>
       <method name="GetElementType" cname="gst_element_factory_get_element_type">
@@ -2673,7 +2673,7 @@
       <method name="SetTarget" cname="gst_ghost_pad_set_target">
         <return-type type="gboolean*" owned="true"/>
         <parameters>
-          <parameter name="newtarget" type="GstPad*"/>
+          <parameter allow-none="1" name="newtarget" type="GstPad*"/>
         </parameters>
       </method>
       <field cname="pad" access="public" writeable="false" readable="true" name="Pad" type="GstProxyPad*"/>
@@ -2706,7 +2706,7 @@
           <parameter name="_object" type="GObject*"/>
           <parameter name="orig" type="GstObject*"/>
           <parameter name="pspec" type="GParamSpec*"/>
-          <parameter name="excluded_props" type="const-gchar**" array="true" null_term_array="true"/>
+          <parameter allow-none="1" name="excluded_props" type="const-gchar**" array="true" null_term_array="true"/>
         </parameters>
       </method>
       <method name="Replace" cname="gst_object_replace" shared="true">
@@ -2728,7 +2728,7 @@
           <parameter name="error" type="GError*">
             <warning>missing glib:type-name</warning>
           </parameter>
-          <parameter name="debug" type="const-gchar*"/>
+          <parameter allow-none="1" name="debug" type="const-gchar*"/>
         </parameters>
       </method>
       <method name="GetControlBinding" cname="gst_object_get_control_binding">
@@ -2950,7 +2950,7 @@
         <return-type type="gchar*" owned="true"/>
         <parameters>
           <parameter name="parent" type="GstElement*"/>
-          <parameter name="stream_id" type="const-gchar*"/>
+          <parameter allow-none="1" name="stream_id" type="const-gchar*"/>
         </parameters>
       </method>
       <method name="EventDefault" cname="gst_pad_event_default">
@@ -3110,7 +3110,7 @@
           <warning>missing glib:type-name</warning>
         </return-type>
         <parameters>
-          <parameter name="filter" type="GstCaps*">
+          <parameter allow-none="1" name="filter" type="GstCaps*">
             <warning>missing glib:type-name</warning>
           </parameter>
         </parameters>
@@ -3128,14 +3128,14 @@
         <return-type type="gboolean"/>
         <parameters>
           <parameter name="format" type="GstFormat"/>
-          <parameter name="duration" type="gint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="duration" type="gint64*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="PeerQueryPosition" cname="gst_pad_peer_query_position">
         <return-type type="gboolean"/>
         <parameters>
           <parameter name="format" type="GstFormat"/>
-          <parameter name="cur" type="gint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="cur" type="gint64*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ProxyQueryAcceptCaps" cname="gst_pad_proxy_query_accept_caps">
@@ -3209,7 +3209,7 @@
           <warning>missing glib:type-name</warning>
         </return-type>
         <parameters>
-          <parameter name="filter" type="GstCaps*">
+          <parameter allow-none="1" name="filter" type="GstCaps*">
             <warning>missing glib:type-name</warning>
           </parameter>
         </parameters>
@@ -3236,7 +3236,7 @@
         <return-type type="gboolean"/>
         <parameters>
           <parameter name="format" type="GstFormat"/>
-          <parameter name="duration" type="gint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="duration" type="gint64*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="QueryPosition" cname="gst_pad_query_position">
@@ -5251,8 +5251,8 @@
       <method name="ParseGap" cname="gst_event_parse_gap">
         <return-type type="void"/>
         <parameters>
-          <parameter name="timestamp" type="guint64" owned="true" pass_as="out"/>
-          <parameter name="duration" type="guint64" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="timestamp" type="guint64" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="duration" type="guint64" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseLatency" cname="gst_event_parse_latency">
@@ -5308,11 +5308,11 @@
       <method name="ParseStep" cname="gst_event_parse_step">
         <return-type type="void"/>
         <parameters>
-          <parameter name="format" type="GstFormat" owned="true" pass_as="out"/>
-          <parameter name="amount" type="guint64*" owned="true" pass_as="out"/>
-          <parameter name="rate" type="gdouble*" owned="true" pass_as="out"/>
-          <parameter name="flush" type="gboolean*" owned="true" pass_as="out"/>
-          <parameter name="intermediate" type="gboolean*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="format" type="GstFormat" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="amount" type="guint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="rate" type="gdouble*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="flush" type="gboolean*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="intermediate" type="gboolean*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseStreamStart" cname="gst_event_parse_stream_start">
@@ -5832,87 +5832,87 @@
       <method name="ParseBuffering" cname="gst_message_parse_buffering">
         <return-type type="void"/>
         <parameters>
-          <parameter name="percent" type="gint*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="percent" type="gint*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseBufferingStats" cname="gst_message_parse_buffering_stats">
         <return-type type="void"/>
         <parameters>
-          <parameter name="mode" type="GstBufferingMode" owned="true" pass_as="out"/>
-          <parameter name="avg_in" type="gint*" owned="true" pass_as="out"/>
-          <parameter name="avg_out" type="gint*" owned="true" pass_as="out"/>
-          <parameter name="buffering_left" type="gint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="mode" type="GstBufferingMode" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="avg_in" type="gint*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="avg_out" type="gint*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="buffering_left" type="gint64*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseClockLost" cname="gst_message_parse_clock_lost">
         <return-type type="void"/>
         <parameters>
-          <parameter name="clock" type="GstClock*" pass_as="out"/>
+          <parameter allow-none="1" name="clock" type="GstClock*" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseClockProvide" cname="gst_message_parse_clock_provide">
         <return-type type="void"/>
         <parameters>
-          <parameter name="clock" type="GstClock*" pass_as="out"/>
-          <parameter name="ready" type="gboolean*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="clock" type="GstClock*" pass_as="out"/>
+          <parameter allow-none="1" name="ready" type="gboolean*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseError" cname="gst_message_parse_error">
         <return-type type="void"/>
         <parameters>
-          <parameter name="gerror" type="GError**" owned="true" pass_as="out">
+          <parameter allow-none="1" name="gerror" type="GError**" owned="true" pass_as="out">
             <warning>missing glib:type-name</warning>
           </parameter>
-          <parameter name="debug" type="gchar*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="debug" type="gchar*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseInfo" cname="gst_message_parse_info">
         <return-type type="void"/>
         <parameters>
-          <parameter name="gerror" type="GError**" owned="true" pass_as="out">
+          <parameter allow-none="1" name="gerror" type="GError**" owned="true" pass_as="out">
             <warning>missing glib:type-name</warning>
           </parameter>
-          <parameter name="debug" type="gchar*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="debug" type="gchar*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseNewClock" cname="gst_message_parse_new_clock">
         <return-type type="void"/>
         <parameters>
-          <parameter name="clock" type="GstClock*" pass_as="out"/>
+          <parameter allow-none="1" name="clock" type="GstClock*" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseProgress" cname="gst_message_parse_progress">
         <return-type type="void"/>
         <parameters>
-          <parameter name="type" type="GstProgressType" owned="true" pass_as="out"/>
-          <parameter name="code" type="gchar*" owned="true" pass_as="out"/>
-          <parameter name="text" type="gchar*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="type" type="GstProgressType" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="code" type="gchar*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="text" type="gchar*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseQos" cname="gst_message_parse_qos">
         <return-type type="void"/>
         <parameters>
-          <parameter name="live" type="gboolean*" owned="true" pass_as="out"/>
-          <parameter name="running_time" type="guint64*" owned="true" pass_as="out"/>
-          <parameter name="stream_time" type="guint64*" owned="true" pass_as="out"/>
-          <parameter name="timestamp" type="guint64*" owned="true" pass_as="out"/>
-          <parameter name="duration" type="guint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="live" type="gboolean*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="running_time" type="guint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="stream_time" type="guint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="timestamp" type="guint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="duration" type="guint64*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseQosStats" cname="gst_message_parse_qos_stats">
         <return-type type="void"/>
         <parameters>
-          <parameter name="format" type="GstFormat" owned="true" pass_as="out"/>
-          <parameter name="processed" type="guint64*" owned="true" pass_as="out"/>
-          <parameter name="dropped" type="guint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="format" type="GstFormat" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="processed" type="guint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="dropped" type="guint64*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseQosValues" cname="gst_message_parse_qos_values">
         <return-type type="void"/>
         <parameters>
-          <parameter name="jitter" type="gint64*" owned="true" pass_as="out"/>
-          <parameter name="proportion" type="gdouble*" owned="true" pass_as="out"/>
-          <parameter name="quality" type="gint*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="jitter" type="gint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="proportion" type="gdouble*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="quality" type="gint*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseRequestState" cname="gst_message_parse_request_state">
@@ -5944,32 +5944,32 @@
       <method name="ParseStateChanged" cname="gst_message_parse_state_changed">
         <return-type type="void"/>
         <parameters>
-          <parameter name="oldstate" type="GstState" owned="true" pass_as="out"/>
-          <parameter name="newstate" type="GstState" owned="true" pass_as="out"/>
-          <parameter name="pending" type="GstState" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="oldstate" type="GstState" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="newstate" type="GstState" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="pending" type="GstState" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseStepDone" cname="gst_message_parse_step_done">
         <return-type type="void"/>
         <parameters>
-          <parameter name="format" type="GstFormat" owned="true" pass_as="out"/>
-          <parameter name="amount" type="guint64*" owned="true" pass_as="out"/>
-          <parameter name="rate" type="gdouble*" owned="true" pass_as="out"/>
-          <parameter name="flush" type="gboolean*" owned="true" pass_as="out"/>
-          <parameter name="intermediate" type="gboolean*" owned="true" pass_as="out"/>
-          <parameter name="duration" type="guint64*" owned="true" pass_as="out"/>
-          <parameter name="eos" type="gboolean*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="format" type="GstFormat" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="amount" type="guint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="rate" type="gdouble*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="flush" type="gboolean*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="intermediate" type="gboolean*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="duration" type="guint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="eos" type="gboolean*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseStepStart" cname="gst_message_parse_step_start">
         <return-type type="void"/>
         <parameters>
-          <parameter name="active" type="gboolean*" owned="true" pass_as="out"/>
-          <parameter name="format" type="GstFormat" owned="true" pass_as="out"/>
-          <parameter name="amount" type="guint64*" owned="true" pass_as="out"/>
-          <parameter name="rate" type="gdouble*" owned="true" pass_as="out"/>
-          <parameter name="flush" type="gboolean*" owned="true" pass_as="out"/>
-          <parameter name="intermediate" type="gboolean*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="active" type="gboolean*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="format" type="GstFormat" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="amount" type="guint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="rate" type="gdouble*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="flush" type="gboolean*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="intermediate" type="gboolean*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseStreamStatus" cname="gst_message_parse_stream_status">
@@ -5983,8 +5983,8 @@
         <return-type type="void"/>
         <parameters>
           <parameter name="type" type="GstStructureChangeType" owned="true" pass_as="out"/>
-          <parameter name="owner" type="GstElement*" pass_as="out"/>
-          <parameter name="busy" type="gboolean*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="owner" type="GstElement*" pass_as="out"/>
+          <parameter allow-none="1" name="busy" type="gboolean*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseTag" cname="gst_message_parse_tag">
@@ -6007,10 +6007,10 @@
       <method name="ParseWarning" cname="gst_message_parse_warning">
         <return-type type="void"/>
         <parameters>
-          <parameter name="gerror" type="GError**" owned="true" pass_as="out">
+          <parameter allow-none="1" name="gerror" type="GError**" owned="true" pass_as="out">
             <warning>missing glib:type-name</warning>
           </parameter>
-          <parameter name="debug" type="gchar*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="debug" type="gchar*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="SetBufferingStats" cname="gst_message_set_buffering_stats">
@@ -6458,7 +6458,7 @@
         <return-type type="void"/>
         <parameters>
           <parameter name="api" type="GType"/>
-          <parameter name="params" type="GstStructure*">
+          <parameter allow-none="1" name="params" type="GstStructure*">
             <warning>missing glib:type-name</warning>
           </parameter>
         </parameters>
@@ -6466,8 +6466,8 @@
       <method name="AddAllocationParam" cname="gst_query_add_allocation_param">
         <return-type type="void"/>
         <parameters>
-          <parameter name="allocator" type="GstAllocator*"/>
-          <parameter name="params" type="GstAllocationParams*">
+          <parameter allow-none="1" name="allocator" type="GstAllocator*"/>
+          <parameter allow-none="1" name="params" type="GstAllocationParams*">
             <warning>missing glib:type-name</warning>
           </parameter>
         </parameters>
@@ -6498,7 +6498,7 @@
         <return-type type="gboolean"/>
         <parameters>
           <parameter name="api" type="GType"/>
-          <parameter name="index" type="guint*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="index" type="guint*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="GetNAllocationMetas" cname="gst_query_get_n_allocation_metas">
@@ -6557,35 +6557,35 @@
       <method name="ParseAllocation" cname="gst_query_parse_allocation">
         <return-type type="void"/>
         <parameters>
-          <parameter name="caps" type="GstCaps**" pass_as="out">
+          <parameter allow-none="1" name="caps" type="GstCaps**" pass_as="out">
             <warning>missing glib:type-name</warning>
           </parameter>
-          <parameter name="need_pool" type="gboolean*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="need_pool" type="gboolean*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseBufferingPercent" cname="gst_query_parse_buffering_percent">
         <return-type type="void"/>
         <parameters>
-          <parameter name="busy" type="gboolean*" owned="true" pass_as="out"/>
-          <parameter name="percent" type="gint*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="busy" type="gboolean*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="percent" type="gint*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseBufferingRange" cname="gst_query_parse_buffering_range">
         <return-type type="void"/>
         <parameters>
-          <parameter name="format" type="GstFormat" owned="true" pass_as="out"/>
-          <parameter name="start" type="gint64*" owned="true" pass_as="out"/>
-          <parameter name="stop" type="gint64*" owned="true" pass_as="out"/>
-          <parameter name="estimated_total" type="gint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="format" type="GstFormat" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="start" type="gint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="stop" type="gint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="estimated_total" type="gint64*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseBufferingStats" cname="gst_query_parse_buffering_stats">
         <return-type type="void"/>
         <parameters>
-          <parameter name="mode" type="GstBufferingMode" owned="true" pass_as="out"/>
-          <parameter name="avg_in" type="gint*" owned="true" pass_as="out"/>
-          <parameter name="avg_out" type="gint*" owned="true" pass_as="out"/>
-          <parameter name="buffering_left" type="gint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="mode" type="GstBufferingMode" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="avg_in" type="gint*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="avg_out" type="gint*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="buffering_left" type="gint64*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseCaps" cname="gst_query_parse_caps">
@@ -6607,38 +6607,38 @@
       <method name="ParseConvert" cname="gst_query_parse_convert">
         <return-type type="void"/>
         <parameters>
-          <parameter name="src_format" type="GstFormat" owned="true" pass_as="out"/>
-          <parameter name="src_value" type="gint64*" owned="true" pass_as="out"/>
-          <parameter name="dest_format" type="GstFormat" owned="true" pass_as="out"/>
-          <parameter name="dest_value" type="gint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="src_format" type="GstFormat" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="src_value" type="gint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="dest_format" type="GstFormat" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="dest_value" type="gint64*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseDuration" cname="gst_query_parse_duration">
         <return-type type="void"/>
         <parameters>
-          <parameter name="format" type="GstFormat" owned="true" pass_as="out"/>
-          <parameter name="duration" type="gint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="format" type="GstFormat" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="duration" type="gint64*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseLatency" cname="gst_query_parse_latency">
         <return-type type="void"/>
         <parameters>
-          <parameter name="live" type="gboolean*" owned="true" pass_as="out"/>
-          <parameter name="min_latency" type="guint64" owned="true" pass_as="out"/>
-          <parameter name="max_latency" type="guint64" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="live" type="gboolean*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="min_latency" type="guint64" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="max_latency" type="guint64" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseNFormats" cname="gst_query_parse_n_formats">
         <return-type type="void"/>
         <parameters>
-          <parameter name="n_formats" type="guint*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="n_formats" type="guint*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseNthAllocationMeta" cname="gst_query_parse_nth_allocation_meta">
         <return-type type="GType"/>
         <parameters>
           <parameter name="index" type="guint"/>
-          <parameter name="params" type="GstStructure**" owned="true" pass_as="out">
+          <parameter allow-none="1" name="params" type="GstStructure**" owned="true" pass_as="out">
             <warning>missing glib:type-name</warning>
           </parameter>
         </parameters>
@@ -6647,8 +6647,8 @@
         <return-type type="void"/>
         <parameters>
           <parameter name="index" type="guint"/>
-          <parameter name="allocator" type="GstAllocator*" pass_as="out"/>
-          <parameter name="params" type="GstAllocationParams*" pass_as="out">
+          <parameter allow-none="1" name="allocator" type="GstAllocator*" pass_as="out"/>
+          <parameter allow-none="1" name="params" type="GstAllocationParams*" pass_as="out">
             <warning>missing glib:type-name</warning>
           </parameter>
         </parameters>
@@ -6657,25 +6657,25 @@
         <return-type type="void"/>
         <parameters>
           <parameter name="index" type="guint"/>
-          <parameter name="pool" type="GstBufferPool*" owned="true" pass_as="out"/>
-          <parameter name="size" type="guint*" owned="true" pass_as="out"/>
-          <parameter name="min_buffers" type="guint*" owned="true" pass_as="out"/>
-          <parameter name="max_buffers" type="guint*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="pool" type="GstBufferPool*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="size" type="guint*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="min_buffers" type="guint*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="max_buffers" type="guint*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseNthBufferingRange" cname="gst_query_parse_nth_buffering_range">
         <return-type type="gboolean"/>
         <parameters>
           <parameter name="index" type="guint"/>
-          <parameter name="start" type="gint64*" owned="true" pass_as="out"/>
-          <parameter name="stop" type="gint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="start" type="gint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="stop" type="gint64*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseNthFormat" cname="gst_query_parse_nth_format">
         <return-type type="void"/>
         <parameters>
           <parameter name="nth" type="guint*" owned="true" pass_as="out"/>
-          <parameter name="format" type="GstFormat" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="format" type="GstFormat" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseNthSchedulingMode" cname="gst_query_parse_nth_scheduling_mode">
@@ -6687,41 +6687,41 @@
       <method name="ParsePosition" cname="gst_query_parse_position">
         <return-type type="void"/>
         <parameters>
-          <parameter name="format" type="GstFormat" owned="true" pass_as="out"/>
-          <parameter name="cur" type="gint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="format" type="GstFormat" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="cur" type="gint64*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseScheduling" cname="gst_query_parse_scheduling">
         <return-type type="void"/>
         <parameters>
-          <parameter name="flags" type="GstSchedulingFlags" owned="true" pass_as="out"/>
-          <parameter name="minsize" type="gint*" owned="true" pass_as="out"/>
-          <parameter name="maxsize" type="gint*" owned="true" pass_as="out"/>
-          <parameter name="align" type="gint*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="flags" type="GstSchedulingFlags" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="minsize" type="gint*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="maxsize" type="gint*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="align" type="gint*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseSeeking" cname="gst_query_parse_seeking">
         <return-type type="void"/>
         <parameters>
-          <parameter name="format" type="GstFormat" owned="true" pass_as="out"/>
-          <parameter name="seekable" type="gboolean*" owned="true" pass_as="out"/>
-          <parameter name="segment_start" type="gint64*" owned="true" pass_as="out"/>
-          <parameter name="segment_end" type="gint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="format" type="GstFormat" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="seekable" type="gboolean*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="segment_start" type="gint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="segment_end" type="gint64*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseSegment" cname="gst_query_parse_segment">
         <return-type type="void"/>
         <parameters>
-          <parameter name="rate" type="gdouble*" owned="true" pass_as="out"/>
-          <parameter name="format" type="GstFormat" owned="true" pass_as="out"/>
-          <parameter name="start_value" type="gint64*" owned="true" pass_as="out"/>
-          <parameter name="stop_value" type="gint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="rate" type="gdouble*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="format" type="GstFormat" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="start_value" type="gint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="stop_value" type="gint64*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="ParseUri" cname="gst_query_parse_uri">
         <return-type type="void"/>
         <parameters>
-          <parameter name="uri" type="gchar*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="uri" type="gchar*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="RemoveNthAllocationMeta" cname="gst_query_remove_nth_allocation_meta">
@@ -6804,8 +6804,8 @@
         <return-type type="void"/>
         <parameters>
           <parameter name="index" type="guint"/>
-          <parameter name="allocator" type="GstAllocator*"/>
-          <parameter name="params" type="GstAllocationParams*">
+          <parameter allow-none="1" name="allocator" type="GstAllocator*"/>
+          <parameter allow-none="1" name="params" type="GstAllocationParams*">
             <warning>missing glib:type-name</warning>
           </parameter>
         </parameters>
@@ -6936,8 +6936,8 @@
           <parameter name="format" type="GstFormat"/>
           <parameter name="start" type="guint64"/>
           <parameter name="stop" type="guint64"/>
-          <parameter name="clip_start" type="guint64*" owned="true" pass_as="out"/>
-          <parameter name="clip_stop" type="guint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="clip_start" type="guint64*" owned="true" pass_as="out"/>
+          <parameter allow-none="1" name="clip_stop" type="guint64*" owned="true" pass_as="out"/>
         </parameters>
       </method>
       <method name="Copy" cname="gst_segment_copy">
@@ -7376,7 +7376,7 @@
         </return-type>
         <parameters>
           <parameter name="string" type="const-gchar*"/>
-          <parameter name="end" type="const-gchar*" pass_as="out"/>
+          <parameter allow-none="1" name="end" type="const-gchar*" pass_as="out"/>
         </parameters>
       </method>
     </boxed>
@@ -7754,7 +7754,7 @@
       <method name="MergeTags" cname="gst_toc_merge_tags">
         <return-type type="void"/>
         <parameters>
-          <parameter name="tags" type="GstTagList*">
+          <parameter allow-none="1" name="tags" type="GstTagList*">
             <warning>missing glib:type-name</warning>
           </parameter>
           <parameter name="mode" type="GstTagMergeMode"/>
@@ -7763,7 +7763,7 @@
       <method name="SetTags" cname="gst_toc_set_tags">
         <return-type type="void"/>
         <parameters>
-          <parameter name="tags" type="GstTagList*" owned="true">
+          <parameter allow-none="1" name="tags" type="GstTagList*" owned="true">
             <warning>missing glib:type-name</warning>
           </parameter>
         </parameters>
@@ -7837,7 +7837,7 @@
       <method name="MergeTags" cname="gst_toc_entry_merge_tags">
         <return-type type="void"/>
         <parameters>
-          <parameter name="tags" type="GstTagList*">
+          <parameter allow-none="1" name="tags" type="GstTagList*">
             <warning>missing glib:type-name</warning>
           </parameter>
           <parameter name="mode" type="GstTagMergeMode"/>
@@ -7853,7 +7853,7 @@
       <method name="SetTags" cname="gst_toc_entry_set_tags">
         <return-type type="void"/>
         <parameters>
-          <parameter name="tags" type="GstTagList*" owned="true">
+          <parameter allow-none="1" name="tags" type="GstTagList*" owned="true">
             <warning>missing glib:type-name</warning>
           </parameter>
         </parameters>
@@ -7889,7 +7889,7 @@
           <parameter name="name" type="const-gchar*"/>
           <parameter name="rank" type="guint"/>
           <parameter closure="6" destroy="7" scope="notified" name="func" type="GstTypeFindFunction"/>
-          <parameter name="extensions" type="const-gchar*"/>
+          <parameter allow-none="1" name="extensions" type="const-gchar*"/>
           <parameter name="possible_caps" type="GstCaps*">
             <warning>missing glib:type-name</warning>
           </parameter>
@@ -8455,7 +8455,7 @@
       <parameters>
         <parameter name="allocator" type="GstAllocator*"/>
         <parameter name="size" type="gsize"/>
-        <parameter name="params" type="GstAllocationParams*">
+        <parameter allow-none="1" name="params" type="GstAllocationParams*">
           <warning>missing glib:type-name</warning>
         </parameter>
       </parameters>
@@ -8546,7 +8546,7 @@
         <parameter name="buffer" type="GstBuffer**" owned="true" pass_as="out">
           <warning>missing glib:type-name</warning>
         </parameter>
-        <parameter name="params" type="GstBufferPoolAcquireParams*">
+        <parameter allow-none="1" name="params" type="GstBufferPoolAcquireParams*">
           <warning>missing glib:type-name</warning>
         </parameter>
       </parameters>
@@ -8774,8 +8774,8 @@
       <return-type type="GstStateChangeReturn"/>
       <parameters>
         <parameter name="element" type="GstElement*"/>
-        <parameter name="state" type="GstState" owned="true" pass_as="out"/>
-        <parameter name="pending" type="GstState" owned="true" pass_as="out"/>
+        <parameter allow-none="1" name="state" type="GstState" owned="true" pass_as="out"/>
+        <parameter allow-none="1" name="pending" type="GstState" owned="true" pass_as="out"/>
         <parameter name="timeout" type="guint64"/>
       </parameters>
     </callback>
@@ -9094,7 +9094,7 @@
           <parameter name="file" type="const-gchar*"/>
           <parameter name="function" type="const-gchar*"/>
           <parameter name="line" type="gint"/>
-          <parameter name="_object" type="GObject*"/>
+          <parameter allow-none="1" name="_object" type="GObject*"/>
           <parameter name="format" type="const-gchar*"/>
           <parameter name="arg7" type="va_list"/>
         </parameters>
@@ -9109,7 +9109,7 @@
           <parameter name="file" type="const-gchar*"/>
           <parameter name="function" type="const-gchar*"/>
           <parameter name="line" type="gint"/>
-          <parameter name="_object" type="GObject*"/>
+          <parameter allow-none="1" name="_object" type="GObject*"/>
           <parameter name="message" type="GstDebugMessage*">
             <warning>missing glib:type-name</warning>
           </parameter>
@@ -9126,7 +9126,7 @@
           <parameter name="file" type="const-gchar*"/>
           <parameter name="function" type="const-gchar*"/>
           <parameter name="line" type="gint"/>
-          <parameter name="_object" type="GObject*"/>
+          <parameter allow-none="1" name="_object" type="GObject*"/>
           <parameter name="format" type="const-gchar*"/>
           <parameter name="args" type="va_list"/>
         </parameters>
@@ -9272,15 +9272,15 @@
       <method name="Init" cname="gst_init" shared="true">
         <return-type type="void"/>
         <parameters>
-          <parameter name="argc" type="gint*" owned="true" pass_as="ref"/>
-          <parameter name="argv" type="char***" owned="true" pass_as="ref" array="true" array_length_param_index="0"/>
+          <parameter allow-none="1" name="argc" type="gint*" owned="true" pass_as="ref"/>
+          <parameter allow-none="1" name="argv" type="char***" owned="true" pass_as="ref" array="true" array_length_param_index="0"/>
         </parameters>
       </method>
       <method name="InitCheck" cname="gst_init_check" shared="true">
         <return-type type="gboolean"/>
         <parameters throws="1">
-          <parameter name="argc" type="gint*" owned="true" pass_as="ref"/>
-          <parameter name="argv" type="char***" owned="true" pass_as="ref" array="true" array_length_param_index="0"/>
+          <parameter allow-none="1" name="argc" type="gint*" owned="true" pass_as="ref"/>
+          <parameter allow-none="1" name="argv" type="char***" owned="true" pass_as="ref" array="true" array_length_param_index="0"/>
           <parameter name="error" type="GError**"/>
         </parameters>
       </method>
@@ -9398,7 +9398,7 @@
         <parameters throws="1">
           <parameter name="bin_description" type="const-gchar*"/>
           <parameter name="ghost_unlinked_pads" type="gboolean"/>
-          <parameter name="context" type="GstParseContext*">
+          <parameter allow-none="1" name="context" type="GstParseContext*">
             <warning>missing glib:type-name</warning>
           </parameter>
           <parameter name="flags" type="GstParseFlags"/>
@@ -9419,7 +9419,7 @@
         <return-type type="GstElement*" owned="true"/>
         <parameters throws="1">
           <parameter name="pipeline_description" type="const-gchar*"/>
-          <parameter name="context" type="GstParseContext*">
+          <parameter allow-none="1" name="context" type="GstParseContext*">
             <warning>missing glib:type-name</warning>
           </parameter>
           <parameter name="flags" type="GstParseFlags"/>
@@ -9437,7 +9437,7 @@
         <return-type type="GstElement*" owned="true"/>
         <parameters throws="1">
           <parameter name="argv" type="const-gchar**" array="true" null_term_array="true"/>
-          <parameter name="context" type="GstParseContext*">
+          <parameter allow-none="1" name="context" type="GstParseContext*">
             <warning>missing glib:type-name</warning>
           </parameter>
           <parameter name="flags" type="GstParseFlags"/>
@@ -9514,7 +9514,7 @@
         </return-type>
         <parameters>
           <parameter name="string" type="const-gchar*"/>
-          <parameter name="end" type="const-gchar*" pass_as="out"/>
+          <parameter allow-none="1" name="end" type="const-gchar*" pass_as="out"/>
         </parameters>
       </method>
       <method name="TagExists" cname="gst_tag_exists" shared="true">
@@ -9625,7 +9625,7 @@
           <parameter name="name" type="const-gchar*"/>
           <parameter name="rank" type="guint"/>
           <parameter closure="6" destroy="7" scope="notified" name="func" type="GstTypeFindFunction"/>
-          <parameter name="extensions" type="const-gchar*"/>
+          <parameter allow-none="1" name="extensions" type="const-gchar*"/>
           <parameter name="possible_caps" type="GstCaps*">
             <warning>missing glib:type-name</warning>
           </parameter>
diff --git a/sources/gst-sharp.metadata b/sources/gst-sharp.metadata
index 239d6582d7..eb069feff3 100644
--- a/sources/gst-sharp.metadata
+++ b/sources/gst-sharp.metadata
@@ -7,6 +7,7 @@
 	<attr path="/api/namespace/object[@cname='GstPad']/property[@name='Caps']" name="type">gpointer</attr>
 	<attr path="/api/namespace/object[@cname='GstPad']/property[@name='Caps']" name="type">gpointer</attr>
 	<attr path="/api/namespace/object[@cname='GstPadTemplate']/property[@name='Caps']" name="type">gpointer</attr>
+	<attr path="/api/namespace/object[@cname='GstObject']/field[@cname='object']" name="name">Obj</attr>
 	<!-- Error with array -->
 	<attr path="/api/namespace/object[@cname='GstGlobal']/method[@cname='gst_formats_contains']" name="hidden">true</attr>
 	<!-- MiniObject issues -->
@@ -28,6 +29,12 @@
 	<attr path="/api/namespace/object[@cname='GstGlobal']/method[@cname='gst_init_check']/parameters/parameter[@name='argc']" name="name">n_argc</attr>
 	<!-- calling oldobj.Handle should fix this -->
 	<remove-attr path="/api/namespace/object[@cname='GstObject']/method[@cname='gst_object_replace']/parameters/parameter[@name='oldobj']" name="pass_as" />
+	<!-- Some glue problems -->
+	<attr path="/api/namespace/object[@cname='GstObject']/field[@cname='object']" name="hidden">true</attr>
+	<attr path="/api/namespace/object[@cname='GstObject']/field[@cname='lock']" name="hidden">true</attr>
+	<attr path="/api/namespace/struct[@cname='GstClockEntry']/field[@cname='func']" name="hidden">true</attr>
+	<attr path="/api/namespace/struct[@cname='GstClockEntry']/field[@cname='destroy_data']" name="hidden">true</attr>
+	<attr path="/api/namespace/object[@cname='GstTask']/field[@cname='notify']" name="hidden">true</attr>
 	<!-- Element is not abstract but should not be instantiable from managed -->
 	<remove-attr path="/api/namespace/object[@cname='GstElement']" name="abstract" />
 	<attr path="/api/namespace/object[@cname='GstElement']" name="defaultconstructoraccess" >protected</attr>
diff --git a/sources/gst-sharp.snk b/sources/gst-sharp.snk
index 82ba2fd97b..403c7ad206 100644
Binary files a/sources/gst-sharp.snk and b/sources/gst-sharp.snk differ