diff --git a/Gir_Gst.toml b/Gir_Gst.toml
index dbbc3ab2f..44992835a 100644
--- a/Gir_Gst.toml
+++ b/Gir_Gst.toml
@@ -796,6 +796,16 @@ status = "generate"
     # wrong mutable for context parameter
     ignore = true
 
+    [[object.function]]
+    name = "util_group_id_next"
+    # newtype wrapper
+    ignore = true
+
+    [[object.function]]
+    name = "util_seqnum_next"
+    # newtype wrapper
+    ignore = true
+
 [[object]]
 name = "Gst.StateChangeReturn"
 status = "generate"
diff --git a/gstreamer/src/auto/functions.rs b/gstreamer/src/auto/functions.rs
index 7f30967a2..a106dc4d0 100644
--- a/gstreamer/src/auto/functions.rs
+++ b/gstreamer/src/auto/functions.rs
@@ -158,20 +158,6 @@ pub fn util_get_timestamp() -> ClockTime {
     }
 }
 
-pub fn util_group_id_next() -> u32 {
-    assert_initialized_main_thread!();
-    unsafe {
-        ffi::gst_util_group_id_next()
-    }
-}
-
-pub fn util_seqnum_next() -> u32 {
-    assert_initialized_main_thread!();
-    unsafe {
-        ffi::gst_util_seqnum_next()
-    }
-}
-
 pub fn version() -> (u32, u32, u32, u32) {
     assert_initialized_main_thread!();
     unsafe {
diff --git a/gstreamer/src/event.rs b/gstreamer/src/event.rs
index ace5d3713..f714a6597 100644
--- a/gstreamer/src/event.rs
+++ b/gstreamer/src/event.rs
@@ -18,13 +18,75 @@ use std::ffi::CStr;
 
 use glib;
 use glib::value::ToSendValue;
-use glib::translate::{from_glib, from_glib_full, from_glib_none, ToGlib, ToGlibPtr};
+use glib::translate::{from_glib, from_glib_full, from_glib_none, FromGlib, ToGlib, ToGlibPtr};
 
 #[cfg(any(feature = "v1_10", feature = "dox"))]
 use glib::translate::FromGlibPtrContainer;
 
 use EventType;
 
+#[derive(Debug, Clone, Copy, Default, PartialEq, Eq)]
+pub struct Seqnum(pub u32);
+pub const SEQNUM_INVALID: Seqnum = Seqnum(0);
+
+impl ToGlib for Seqnum {
+    type GlibType = u32;
+
+    fn to_glib(&self) -> u32 {
+        self.0
+    }
+}
+
+impl FromGlib<u32> for Seqnum {
+    fn from_glib(val: u32) -> Seqnum {
+        skip_assert_initialized!();
+        Seqnum(val)
+    }
+}
+
+impl Into<u32> for Seqnum {
+    fn into(self) -> u32 {
+        self.0
+    }
+}
+
+impl From<u32> for Seqnum {
+    fn from(v: u32) -> Seqnum {
+        Seqnum(v)
+    }
+}
+
+#[derive(Debug, Clone, Copy, Default, PartialEq, Eq)]
+pub struct GroupId(pub u32);
+pub const GROUP_ID_INVALID: GroupId = GroupId(0);
+
+impl ToGlib for GroupId {
+    type GlibType = u32;
+
+    fn to_glib(&self) -> u32 {
+        self.0
+    }
+}
+
+impl Into<u32> for GroupId {
+    fn into(self) -> u32 {
+        self.0
+    }
+}
+
+impl From<u32> for GroupId {
+    fn from(v: u32) -> GroupId {
+        GroupId(v)
+    }
+}
+
+impl FromGlib<u32> for GroupId {
+    fn from_glib(val: u32) -> GroupId {
+        skip_assert_initialized!();
+        GroupId(val)
+    }
+}
+
 #[repr(C)]
 pub struct EventRef(ffi::GstEvent);
 
@@ -92,8 +154,8 @@ impl PartialOrd for EventType {
 }
 
 impl EventRef {
-    pub fn get_seqnum(&self) -> u32 {
-        unsafe { ffi::gst_event_get_seqnum(self.as_mut_ptr()) }
+    pub fn get_seqnum(&self) -> Seqnum {
+        unsafe { from_glib(ffi::gst_event_get_seqnum(self.as_mut_ptr())) }
     }
 
     pub fn get_running_time_offset(&self) -> i64 {
@@ -239,7 +301,7 @@ impl GstRc<EventRef> {
     }
 
     #[cfg(any(feature = "v1_10", feature = "dox"))]
-    pub fn new_stream_group_done<'a>(group_id: u32) -> StreamGroupDoneBuilder<'a> {
+    pub fn new_stream_group_done<'a>(group_id: GroupId) -> StreamGroupDoneBuilder<'a> {
         assert_initialized_main_thread!();
         StreamGroupDoneBuilder::new(group_id)
     }
@@ -474,13 +536,13 @@ impl<'a> StreamStart<'a> {
         }
     }
 
-    pub fn get_group_id(&self) -> u32 {
+    pub fn get_group_id(&self) -> GroupId {
         unsafe {
             let mut group_id = mem::uninitialized();
 
             ffi::gst_event_parse_group_id(self.0.as_mut_ptr(), &mut group_id);
 
-            group_id
+            from_glib(group_id)
         }
     }
 }
@@ -574,13 +636,13 @@ impl<'a> SinkMessage<'a> {
 pub struct StreamGroupDone<'a>(&'a EventRef);
 impl<'a> StreamGroupDone<'a> {
     #[cfg(any(feature = "v1_10", feature = "dox"))]
-    pub fn get_group_id(&self) -> u32 {
+    pub fn get_group_id(&self) -> GroupId {
         unsafe {
             let mut group_id = mem::uninitialized();
 
             ffi::gst_event_parse_stream_group_done(self.0.as_mut_ptr(), &mut group_id);
 
-            group_id
+            from_glib(group_id)
         }
     }
 }
@@ -802,7 +864,7 @@ pub struct CustomBothOob<'a>(&'a EventRef);
 
 macro_rules! event_builder_generic_impl {
     ($new_fn:expr) => {
-        pub fn seqnum(self, seqnum: u32) -> Self {
+        pub fn seqnum(self, seqnum: Seqnum) -> Self {
             Self {
                 seqnum: Some(seqnum),
                 .. self
@@ -830,7 +892,7 @@ macro_rules! event_builder_generic_impl {
             unsafe {
                 let event = $new_fn(&mut self);
                 if let Some(seqnum) = self.seqnum {
-                    ffi::gst_event_set_seqnum(event, seqnum);
+                    ffi::gst_event_set_seqnum(event, seqnum.to_glib());
                 }
 
                 if let Some(running_time_offset) = self.running_time_offset {
@@ -854,7 +916,7 @@ macro_rules! event_builder_generic_impl {
 }
 
 pub struct FlushStartBuilder<'a> {
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     running_time_offset: Option<i64>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
 }
@@ -872,7 +934,7 @@ impl<'a> FlushStartBuilder<'a> {
 }
 
 pub struct FlushStopBuilder<'a> {
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     running_time_offset: Option<i64>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     reset_time: bool,
@@ -894,12 +956,12 @@ impl<'a> FlushStopBuilder<'a> {
 }
 
 pub struct StreamStartBuilder<'a> {
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     running_time_offset: Option<i64>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     stream_id: &'a str,
     flags: Option<::StreamFlags>,
-    group_id: Option<u32>,
+    group_id: Option<GroupId>,
 }
 impl<'a> StreamStartBuilder<'a> {
     fn new(stream_id: &'a str) -> Self {
@@ -921,7 +983,7 @@ impl<'a> StreamStartBuilder<'a> {
         }
     }
 
-    pub fn group_id(self, group_id: u32) -> Self {
+    pub fn group_id(self, group_id: GroupId) -> Self {
         Self {
             group_id: Some(group_id),
             ..self
@@ -934,14 +996,14 @@ impl<'a> StreamStartBuilder<'a> {
             ffi::gst_event_set_stream_flags(ev, flags.to_glib());
         }
         if let Some(group_id) = s.group_id {
-            ffi::gst_event_set_group_id(ev, group_id);
+            ffi::gst_event_set_group_id(ev, group_id.to_glib());
         }
         ev
     });
 }
 
 pub struct CapsBuilder<'a> {
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     running_time_offset: Option<i64>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     caps: &'a ::Caps,
@@ -961,7 +1023,7 @@ impl<'a> CapsBuilder<'a> {
 }
 
 pub struct SegmentBuilder<'a> {
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     running_time_offset: Option<i64>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     segment: &'a ::Segment,
@@ -984,7 +1046,7 @@ impl<'a> SegmentBuilder<'a> {
 
 #[cfg(any(feature = "v1_10", feature = "dox"))]
 pub struct StreamCollectionBuilder<'a> {
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     running_time_offset: Option<i64>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     stream_collection: &'a ::StreamCollection,
@@ -1007,7 +1069,7 @@ impl<'a> StreamCollectionBuilder<'a> {
 }
 
 pub struct TagBuilder<'a> {
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     running_time_offset: Option<i64>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     tags: Option<::TagList>,
@@ -1030,7 +1092,7 @@ impl<'a> TagBuilder<'a> {
 }
 
 pub struct BufferSizeBuilder<'a> {
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     running_time_offset: Option<i64>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     minsize: ::FormatValue,
@@ -1061,7 +1123,7 @@ impl<'a> BufferSizeBuilder<'a> {
 }
 
 pub struct SinkMessageBuilder<'a> {
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     running_time_offset: Option<i64>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     name: &'a str,
@@ -1086,28 +1148,28 @@ impl<'a> SinkMessageBuilder<'a> {
 
 #[cfg(any(feature = "v1_10", feature = "dox"))]
 pub struct StreamGroupDoneBuilder<'a> {
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     running_time_offset: Option<i64>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
-    uid: u32,
+    group_id: GroupId,
 }
 #[cfg(any(feature = "v1_10", feature = "dox"))]
 impl<'a> StreamGroupDoneBuilder<'a> {
-    fn new(uid: u32) -> Self {
+    fn new(group_id: GroupId) -> Self {
         skip_assert_initialized!();
         Self {
             seqnum: None,
             running_time_offset: None,
             other_fields: Vec::new(),
-            uid: uid,
+            group_id: group_id,
         }
     }
 
-    event_builder_generic_impl!(|s: &Self| ffi::gst_event_new_stream_group_done(s.uid));
+    event_builder_generic_impl!(|s: &Self| ffi::gst_event_new_stream_group_done(s.group_id.to_glib()));
 }
 
 pub struct EosBuilder<'a> {
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     running_time_offset: Option<i64>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
 }
@@ -1125,7 +1187,7 @@ impl<'a> EosBuilder<'a> {
 }
 
 pub struct TocBuilder<'a> {
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     running_time_offset: Option<i64>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     toc: &'a ::Toc,
@@ -1149,7 +1211,7 @@ impl<'a> TocBuilder<'a> {
 }
 
 pub struct ProtectionBuilder<'a> {
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     running_time_offset: Option<i64>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     system_id: &'a str,
@@ -1179,7 +1241,7 @@ impl<'a> ProtectionBuilder<'a> {
 }
 
 pub struct SegmentDoneBuilder<'a> {
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     running_time_offset: Option<i64>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     position: ::FormatValue,
@@ -1201,7 +1263,7 @@ impl<'a> SegmentDoneBuilder<'a> {
 }
 
 pub struct GapBuilder<'a> {
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     running_time_offset: Option<i64>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     timestamp: u64,
@@ -1223,7 +1285,7 @@ impl<'a> GapBuilder<'a> {
 }
 
 pub struct QosBuilder<'a> {
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     running_time_offset: Option<i64>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     type_: ::QOSType,
@@ -1251,7 +1313,7 @@ impl<'a> QosBuilder<'a> {
 }
 
 pub struct SeekBuilder<'a> {
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     running_time_offset: Option<i64>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     rate: f64,
@@ -1298,7 +1360,7 @@ impl<'a> SeekBuilder<'a> {
 }
 
 pub struct NavigationBuilder<'a> {
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     running_time_offset: Option<i64>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     structure: Option<Structure>,
@@ -1324,7 +1386,7 @@ impl<'a> NavigationBuilder<'a> {
 }
 
 pub struct LatencyBuilder<'a> {
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     running_time_offset: Option<i64>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     latency: u64,
@@ -1344,7 +1406,7 @@ impl<'a> LatencyBuilder<'a> {
 }
 
 pub struct StepBuilder<'a> {
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     running_time_offset: Option<i64>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     fmt: ::Format,
@@ -1380,7 +1442,7 @@ impl<'a> StepBuilder<'a> {
 }
 
 pub struct ReconfigureBuilder<'a> {
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     running_time_offset: Option<i64>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
 }
@@ -1398,7 +1460,7 @@ impl<'a> ReconfigureBuilder<'a> {
 }
 
 pub struct TocSelectBuilder<'a> {
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     running_time_offset: Option<i64>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     uid: &'a str,
@@ -1421,7 +1483,7 @@ impl<'a> TocSelectBuilder<'a> {
 
 #[cfg(any(feature = "v1_10", feature = "dox"))]
 pub struct SelectStreamsBuilder<'a> {
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     running_time_offset: Option<i64>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     streams: &'a [&'a str],
@@ -1444,7 +1506,7 @@ impl<'a> SelectStreamsBuilder<'a> {
 }
 
 pub struct CustomUpstreamBuilder<'a> {
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     running_time_offset: Option<i64>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     structure: Option<Structure>,
@@ -1471,7 +1533,7 @@ impl<'a> CustomUpstreamBuilder<'a> {
 }
 
 pub struct CustomDownstreamBuilder<'a> {
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     running_time_offset: Option<i64>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     structure: Option<Structure>,
@@ -1498,7 +1560,7 @@ impl<'a> CustomDownstreamBuilder<'a> {
 }
 
 pub struct CustomDownstreamOobBuilder<'a> {
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     running_time_offset: Option<i64>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     structure: Option<Structure>,
@@ -1527,7 +1589,7 @@ impl<'a> CustomDownstreamOobBuilder<'a> {
 }
 
 pub struct CustomDownstreamStickyBuilder<'a> {
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     running_time_offset: Option<i64>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     structure: Option<Structure>,
@@ -1556,7 +1618,7 @@ impl<'a> CustomDownstreamStickyBuilder<'a> {
 }
 
 pub struct CustomBothBuilder<'a> {
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     running_time_offset: Option<i64>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     structure: Option<Structure>,
@@ -1582,7 +1644,7 @@ impl<'a> CustomBothBuilder<'a> {
 }
 
 pub struct CustomBothOobBuilder<'a> {
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     running_time_offset: Option<i64>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     structure: Option<Structure>,
diff --git a/gstreamer/src/functions.rs b/gstreamer/src/functions.rs
index 8408d974c..f07a0ea4f 100644
--- a/gstreamer/src/functions.rs
+++ b/gstreamer/src/functions.rs
@@ -85,3 +85,25 @@ pub fn parse_launchv_full<'a, P: Into<Option<&'a mut ParseContext>>>(
         }
     }
 }
+
+pub fn util_group_id_next() -> ::GroupId {
+    assert_initialized_main_thread!();
+    unsafe {
+        let v = from_glib(ffi::gst_util_group_id_next());
+        if v == ::GROUP_ID_INVALID {
+            return from_glib(ffi::gst_util_group_id_next());
+        }
+        v
+    }
+}
+
+pub fn util_seqnum_next() -> ::Seqnum {
+    assert_initialized_main_thread!();
+    unsafe {
+        let v = from_glib(ffi::gst_util_seqnum_next());
+        if v == ::SEQNUM_INVALID {
+            return from_glib(ffi::gst_util_seqnum_next());
+        }
+        v
+    }
+}
diff --git a/gstreamer/src/lib.rs b/gstreamer/src/lib.rs
index 7c88ff301..05668373a 100644
--- a/gstreamer/src/lib.rs
+++ b/gstreamer/src/lib.rs
@@ -82,7 +82,7 @@ pub use bufferlist::{BufferList, BufferListRef};
 pub mod query;
 pub use query::{Query, QueryRef, QueryView};
 pub mod event;
-pub use event::{Event, EventRef, EventView};
+pub use event::{Event, EventRef, EventView, GroupId, Seqnum, GROUP_ID_INVALID, SEQNUM_INVALID};
 pub mod context;
 pub use context::{Context, ContextRef};
 mod static_caps;
diff --git a/gstreamer/src/message.rs b/gstreamer/src/message.rs
index a240b77e3..3f25e6506 100644
--- a/gstreamer/src/message.rs
+++ b/gstreamer/src/message.rs
@@ -12,6 +12,8 @@ use miniobject::*;
 use structure::*;
 use TagList;
 use GstObjectExt;
+use Seqnum;
+use GroupId;
 
 use std::ptr;
 use std::mem;
@@ -41,8 +43,8 @@ impl MessageRef {
         unsafe { from_glib_none((*self.as_ptr()).src) }
     }
 
-    pub fn get_seqnum(&self) -> u32 {
-        unsafe { ffi::gst_message_get_seqnum(self.as_mut_ptr()) }
+    pub fn get_seqnum(&self) -> Seqnum {
+        unsafe { from_glib(ffi::gst_message_get_seqnum(self.as_mut_ptr())) }
     }
 
     pub fn get_structure(&self) -> Option<&StructureRef> {
@@ -961,7 +963,7 @@ impl<'a> ResetTime<'a> {
 
 pub struct StreamStart<'a>(&'a MessageRef);
 impl<'a> StreamStart<'a> {
-    pub fn get_group_id(&self) -> Option<u32> {
+    pub fn get_group_id(&self) -> Option<GroupId> {
         unsafe {
             let mut group_id = mem::uninitialized();
 
@@ -969,7 +971,7 @@ impl<'a> StreamStart<'a> {
                 self.0.as_mut_ptr(),
                 &mut group_id,
             )) {
-                Some(group_id)
+                Some(from_glib(group_id))
             } else {
                 None
             }
@@ -1151,7 +1153,7 @@ macro_rules! message_builder_generic_impl {
             }
         }
 
-        pub fn seqnum(self, seqnum: u32) -> Self {
+        pub fn seqnum(self, seqnum: Seqnum) -> Self {
             Self {
                 seqnum: Some(seqnum),
                 .. self
@@ -1173,7 +1175,7 @@ macro_rules! message_builder_generic_impl {
                 let src = self.src.to_glib_none().0;
                 let msg = $new_fn(&mut self, src);
                 if let Some(seqnum) = self.seqnum {
-                    ffi::gst_message_set_seqnum(msg, seqnum);
+                    ffi::gst_message_set_seqnum(msg, seqnum.to_glib());
                 }
 
                 {
@@ -1194,7 +1196,7 @@ macro_rules! message_builder_generic_impl {
 
 pub struct EosBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
 }
 impl<'a> EosBuilder<'a> {
@@ -1219,7 +1221,7 @@ impl MessageErrorDomain for ::LibraryError {}
 
 pub struct ErrorBuilder<'a, T> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     error: T,
     message: &'a str,
@@ -1287,7 +1289,7 @@ impl<'a, T: MessageErrorDomain> ErrorBuilder<'a, T> {
 
 pub struct WarningBuilder<'a, T> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     error: T,
     message: &'a str,
@@ -1355,7 +1357,7 @@ impl<'a, T: MessageErrorDomain> WarningBuilder<'a, T> {
 
 pub struct InfoBuilder<'a, T> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     error: T,
     message: &'a str,
@@ -1423,7 +1425,7 @@ impl<'a, T: MessageErrorDomain> InfoBuilder<'a, T> {
 
 pub struct TagBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     tags: &'a TagList,
 }
@@ -1445,7 +1447,7 @@ impl<'a> TagBuilder<'a> {
 
 pub struct BufferingBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     percent: i32,
     stats: Option<(::BufferingMode, i32, i32, i64)>,
@@ -1495,7 +1497,7 @@ impl<'a> BufferingBuilder<'a> {
 
 pub struct StateChangedBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     old: ::State,
     new: ::State,
@@ -1526,7 +1528,7 @@ impl<'a> StateChangedBuilder<'a> {
 
 pub struct StateDirtyBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
 }
 impl<'a> StateDirtyBuilder<'a> {
@@ -1544,7 +1546,7 @@ impl<'a> StateDirtyBuilder<'a> {
 
 pub struct StepDoneBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     format: ::Format,
     amount: u64,
@@ -1595,7 +1597,7 @@ impl<'a> StepDoneBuilder<'a> {
 
 pub struct ClockProvideBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     clock: &'a ::Clock,
     ready: bool,
@@ -1619,7 +1621,7 @@ impl<'a> ClockProvideBuilder<'a> {
 
 pub struct ClockLostBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     clock: &'a ::Clock,
 }
@@ -1641,7 +1643,7 @@ impl<'a> ClockLostBuilder<'a> {
 
 pub struct NewClockBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     clock: &'a ::Clock,
 }
@@ -1663,7 +1665,7 @@ impl<'a> NewClockBuilder<'a> {
 
 pub struct StructureChangeBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     type_: ::StructureChangeType,
     owner: &'a ::Element,
@@ -1694,7 +1696,7 @@ impl<'a> StructureChangeBuilder<'a> {
 
 pub struct StreamStatusBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     type_: ::StreamStatusType,
     owner: &'a ::Element,
@@ -1732,7 +1734,7 @@ impl<'a> StreamStatusBuilder<'a> {
 
 pub struct ApplicationBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     structure: Option<::Structure>,
 }
@@ -1754,7 +1756,7 @@ impl<'a> ApplicationBuilder<'a> {
 
 pub struct ElementBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     structure: Option<::Structure>,
 }
@@ -1776,7 +1778,7 @@ impl<'a> ElementBuilder<'a> {
 
 pub struct SegmentStartBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     position: ::FormatValue,
 }
@@ -1802,7 +1804,7 @@ impl<'a> SegmentStartBuilder<'a> {
 
 pub struct SegmentDoneBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     position: ::FormatValue,
 }
@@ -1828,7 +1830,7 @@ impl<'a> SegmentDoneBuilder<'a> {
 
 pub struct DurationChangedBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
 }
 impl<'a> DurationChangedBuilder<'a> {
@@ -1846,7 +1848,7 @@ impl<'a> DurationChangedBuilder<'a> {
 
 pub struct LatencyBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
 }
 impl<'a> LatencyBuilder<'a> {
@@ -1864,7 +1866,7 @@ impl<'a> LatencyBuilder<'a> {
 
 pub struct AsyncStartBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
 }
 impl<'a> AsyncStartBuilder<'a> {
@@ -1882,7 +1884,7 @@ impl<'a> AsyncStartBuilder<'a> {
 
 pub struct AsyncDoneBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     running_time: u64,
 }
@@ -1904,7 +1906,7 @@ impl<'a> AsyncDoneBuilder<'a> {
 
 pub struct RequestStateBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     state: ::State,
 }
@@ -1926,7 +1928,7 @@ impl<'a> RequestStateBuilder<'a> {
 
 pub struct StepStartBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     active: bool,
     format: ::Format,
@@ -1973,7 +1975,7 @@ impl<'a> StepStartBuilder<'a> {
 
 pub struct QosBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     live: bool,
     running_time: u64,
@@ -2035,7 +2037,7 @@ impl<'a> QosBuilder<'a> {
 
 pub struct ProgressBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     type_: ::ProgressType,
     code: Option<&'a str>,
@@ -2080,7 +2082,7 @@ impl<'a> ProgressBuilder<'a> {
 
 pub struct TocBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     toc: &'a ::Toc,
     updated: bool,
@@ -2104,7 +2106,7 @@ impl<'a> TocBuilder<'a> {
 
 pub struct ResetTimeBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     running_time: u64,
 }
@@ -2126,9 +2128,9 @@ impl<'a> ResetTimeBuilder<'a> {
 
 pub struct StreamStartBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
-    group_id: Option<u32>,
+    group_id: Option<GroupId>,
 }
 impl<'a> StreamStartBuilder<'a> {
     fn new() -> Self {
@@ -2141,7 +2143,7 @@ impl<'a> StreamStartBuilder<'a> {
         }
     }
 
-    pub fn group_id(self, group_id: u32) -> Self {
+    pub fn group_id(self, group_id: GroupId) -> Self {
         Self {
             group_id: Some(group_id),
             ..self
@@ -2151,7 +2153,7 @@ impl<'a> StreamStartBuilder<'a> {
     message_builder_generic_impl!(|s: &mut Self, src| {
         let msg = ffi::gst_message_new_stream_start(src);
         if let Some(group_id) = s.group_id {
-            ffi::gst_message_set_group_id(msg, group_id);
+            ffi::gst_message_set_group_id(msg, group_id.to_glib());
         }
         msg
     });
@@ -2159,7 +2161,7 @@ impl<'a> StreamStartBuilder<'a> {
 
 pub struct NeedContextBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     context_type: &'a str,
 }
@@ -2181,7 +2183,7 @@ impl<'a> NeedContextBuilder<'a> {
 
 pub struct HaveContextBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     context: Option<::Context>,
 }
@@ -2204,7 +2206,7 @@ impl<'a> HaveContextBuilder<'a> {
 
 pub struct DeviceAddedBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     device: &'a ::Device,
 }
@@ -2226,7 +2228,7 @@ impl<'a> DeviceAddedBuilder<'a> {
 
 pub struct DeviceRemovedBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     device: &'a ::Device,
 }
@@ -2249,7 +2251,7 @@ impl<'a> DeviceRemovedBuilder<'a> {
 #[cfg(any(feature = "v1_10", feature = "dox"))]
 pub struct PropertyNotifyBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     property_name: &'a str,
     value: &'a glib::Value,
@@ -2279,7 +2281,7 @@ impl<'a> PropertyNotifyBuilder<'a> {
 #[cfg(any(feature = "v1_10", feature = "dox"))]
 pub struct StreamCollectionBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     collection: &'a ::StreamCollection,
 }
@@ -2303,7 +2305,7 @@ impl<'a> StreamCollectionBuilder<'a> {
 #[cfg(any(feature = "v1_10", feature = "dox"))]
 pub struct StreamsSelectedBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     #[cfg(any(feature = "v1_10", feature = "dox"))] collection: &'a ::StreamCollection,
     #[cfg(any(feature = "v1_10", feature = "dox"))] streams: Option<&'a [&'a ::Stream]>,
@@ -2342,7 +2344,7 @@ impl<'a> StreamsSelectedBuilder<'a> {
 #[cfg(any(feature = "v1_10", feature = "dox"))]
 pub struct RedirectBuilder<'a> {
     src: Option<Object>,
-    seqnum: Option<u32>,
+    seqnum: Option<Seqnum>,
     other_fields: Vec<(&'a str, &'a ToSendValue)>,
     location: &'a str,
     tag_list: Option<&'a TagList>,