diff --git a/gstreamer-sdp/src/sdp_attribute.rs b/gstreamer-sdp/src/sdp_attribute.rs
index 6720092f0..cabb6b7e0 100644
--- a/gstreamer-sdp/src/sdp_attribute.rs
+++ b/gstreamer-sdp/src/sdp_attribute.rs
@@ -7,26 +7,22 @@
 // except according to those terms.
 
 use std::ffi::CStr;
+use std::fmt;
 use std::mem;
 
 use ffi;
 use glib::translate::*;
 
 #[repr(C)]
-#[derive(Debug)]
 pub struct SDPAttribute(pub(crate) ffi::GstSDPAttribute);
 
 impl SDPAttribute {
-    pub fn new(key: &str, value: &str) -> Result<Self, ()> {
+    pub fn new(key: &str, value: Option<&str>) -> Self {
         assert_initialized_main_thread!();
         unsafe {
             let mut attr = mem::zeroed();
-            let result =
-                ffi::gst_sdp_attribute_set(&mut attr, key.to_glib_none().0, value.to_glib_none().0);
-            match result {
-                ffi::GST_SDP_OK => Ok(SDPAttribute(attr)),
-                _ => Err(()),
-            }
+            ffi::gst_sdp_attribute_set(&mut attr, key.to_glib_none().0, value.to_glib_none().0);
+            SDPAttribute(attr)
         }
     }
 
@@ -34,8 +30,22 @@ impl SDPAttribute {
         unsafe { CStr::from_ptr(self.0.key).to_str().unwrap() }
     }
 
-    pub fn value(&self) -> &str {
-        unsafe { CStr::from_ptr(self.0.value).to_str().unwrap() }
+    pub fn value(&self) -> Option<&str> {
+        unsafe {
+            let ptr = self.0.value;
+
+            if ptr.is_null() {
+                None
+            } else {
+                Some(CStr::from_ptr(ptr).to_str().unwrap())
+            }
+        }
+    }
+}
+
+impl Clone for SDPAttribute {
+    fn clone(&self) -> Self {
+        SDPAttribute::new(self.key(), self.value())
     }
 }
 
@@ -46,3 +56,12 @@ impl Drop for SDPAttribute {
         }
     }
 }
+
+impl fmt::Debug for SDPAttribute {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        f.debug_struct("SDPAttribute")
+            .field("key", &self.key())
+            .field("value", &self.value())
+            .finish()
+    }
+}
diff --git a/gstreamer-sdp/src/sdp_bandwidth.rs b/gstreamer-sdp/src/sdp_bandwidth.rs
index 4b0292a4f..10beb2405 100644
--- a/gstreamer-sdp/src/sdp_bandwidth.rs
+++ b/gstreamer-sdp/src/sdp_bandwidth.rs
@@ -7,25 +7,22 @@
 // except according to those terms.
 
 use std::ffi::CStr;
+use std::fmt;
 use std::mem;
 
 use ffi;
 use glib::translate::*;
 
 #[repr(C)]
-#[derive(Debug)]
 pub struct SDPBandwidth(pub(crate) ffi::GstSDPBandwidth);
 
 impl SDPBandwidth {
-    pub fn new(bwtype: &str, bandwidth: u32) -> Result<Self, ()> {
+    pub fn new(bwtype: &str, bandwidth: u32) -> Self {
         assert_initialized_main_thread!();
         unsafe {
             let mut bw = mem::zeroed();
-            let result = ffi::gst_sdp_bandwidth_set(&mut bw, bwtype.to_glib_none().0, bandwidth);
-            match result {
-                ffi::GST_SDP_OK => Ok(SDPBandwidth(bw)),
-                _ => Err(()),
-            }
+            ffi::gst_sdp_bandwidth_set(&mut bw, bwtype.to_glib_none().0, bandwidth);
+            SDPBandwidth(bw)
         }
     }
 
@@ -38,6 +35,12 @@ impl SDPBandwidth {
     }
 }
 
+impl Clone for SDPBandwidth {
+    fn clone(&self) -> Self {
+        SDPBandwidth::new(self.bwtype(), self.value())
+    }
+}
+
 impl Drop for SDPBandwidth {
     fn drop(&mut self) {
         unsafe {
@@ -45,3 +48,12 @@ impl Drop for SDPBandwidth {
         }
     }
 }
+
+impl fmt::Debug for SDPBandwidth {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        f.debug_struct("SDPBandwidth")
+            .field("bwtype", &self.bwtype())
+            .field("value", &self.value())
+            .finish()
+    }
+}
diff --git a/gstreamer-sdp/src/sdp_connection.rs b/gstreamer-sdp/src/sdp_connection.rs
index 6d1f61aaa..fbf3bcc19 100644
--- a/gstreamer-sdp/src/sdp_connection.rs
+++ b/gstreamer-sdp/src/sdp_connection.rs
@@ -7,27 +7,21 @@
 // except according to those terms.
 
 use std::ffi::CStr;
+use std::fmt;
 use std::mem;
 
 use ffi;
 use glib::translate::*;
 
 #[repr(C)]
-#[derive(Debug)]
 pub struct SDPConnection(pub(crate) ffi::GstSDPConnection);
 
 impl SDPConnection {
-    pub fn new(
-        nettype: &str,
-        addrtype: &str,
-        address: &str,
-        ttl: u32,
-        addr_number: u32,
-    ) -> Result<Self, ()> {
+    pub fn new(nettype: &str, addrtype: &str, address: &str, ttl: u32, addr_number: u32) -> Self {
         assert_initialized_main_thread!();
         unsafe {
             let mut conn = mem::zeroed();
-            let result = ffi::gst_sdp_connection_set(
+            ffi::gst_sdp_connection_set(
                 &mut conn,
                 nettype.to_glib_none().0,
                 addrtype.to_glib_none().0,
@@ -35,10 +29,7 @@ impl SDPConnection {
                 ttl,
                 addr_number,
             );
-            match result {
-                ffi::GST_SDP_OK => Ok(SDPConnection(conn)),
-                _ => Err(()),
-            }
+            SDPConnection(conn)
         }
     }
 
@@ -63,6 +54,18 @@ impl SDPConnection {
     }
 }
 
+impl Clone for SDPConnection {
+    fn clone(&self) -> Self {
+        SDPConnection::new(
+            self.nettype(),
+            self.addrtype(),
+            self.address(),
+            self.ttl(),
+            self.addr_number(),
+        )
+    }
+}
+
 impl Drop for SDPConnection {
     fn drop(&mut self) {
         unsafe {
@@ -70,3 +73,15 @@ impl Drop for SDPConnection {
         }
     }
 }
+
+impl fmt::Debug for SDPConnection {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        f.debug_struct("SDPConnection")
+            .field("nettype", &self.nettype())
+            .field("addrtype", &self.addrtype())
+            .field("address", &self.address())
+            .field("ttl", &self.ttl())
+            .field("addr_number", &self.addr_number())
+            .finish()
+    }
+}
diff --git a/gstreamer-sdp/src/sdp_key.rs b/gstreamer-sdp/src/sdp_key.rs
index ef470e2ea..8b5016534 100644
--- a/gstreamer-sdp/src/sdp_key.rs
+++ b/gstreamer-sdp/src/sdp_key.rs
@@ -7,11 +7,11 @@
 // except according to those terms.
 
 use std::ffi::CStr;
+use std::fmt;
 
 use ffi;
 
 #[repr(C)]
-#[derive(Debug)]
 pub struct SDPKey(ffi::GstSDPKey);
 
 impl SDPKey {
@@ -23,3 +23,12 @@ impl SDPKey {
         unsafe { CStr::from_ptr(self.0.data).to_str().unwrap() }
     }
 }
+
+impl fmt::Debug for SDPKey {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        f.debug_struct("SDPKey")
+            .field("type", &self.type_())
+            .field("data", &self.data())
+            .finish()
+    }
+}
diff --git a/gstreamer-sdp/src/sdp_origin.rs b/gstreamer-sdp/src/sdp_origin.rs
index bc0040168..3e96fc99b 100644
--- a/gstreamer-sdp/src/sdp_origin.rs
+++ b/gstreamer-sdp/src/sdp_origin.rs
@@ -7,11 +7,11 @@
 // except according to those terms.
 
 use std::ffi::CStr;
+use std::fmt;
 
 use ffi;
 
 #[repr(C)]
-#[derive(Debug)]
 pub struct SDPOrigin(pub(crate) ffi::GstSDPOrigin);
 
 impl SDPOrigin {
@@ -39,3 +39,16 @@ impl SDPOrigin {
         unsafe { CStr::from_ptr(self.0.addr).to_str().unwrap() }
     }
 }
+
+impl fmt::Debug for SDPOrigin {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        f.debug_struct("SDPOrigin")
+            .field("username", &self.username())
+            .field("sess_id", &self.sess_id())
+            .field("sess_version", &self.sess_version())
+            .field("nettype", &self.nettype())
+            .field("addrtype", &self.addrtype())
+            .field("addr", &self.addr())
+            .finish()
+    }
+}
diff --git a/gstreamer-sdp/src/sdp_time.rs b/gstreamer-sdp/src/sdp_time.rs
index 685d98971..c513653ed 100644
--- a/gstreamer-sdp/src/sdp_time.rs
+++ b/gstreamer-sdp/src/sdp_time.rs
@@ -7,6 +7,7 @@
 // except according to those terms.
 
 use std::ffi::CStr;
+use std::fmt;
 use std::mem;
 use std::os::raw::c_char;
 
@@ -14,24 +15,20 @@ use ffi;
 use glib::translate::*;
 
 #[repr(C)]
-#[derive(Debug)]
 pub struct SDPTime(pub(crate) ffi::GstSDPTime);
 
 impl SDPTime {
-    pub fn new(start: &str, stop: &str, repeat: &[&str]) -> Result<Self, ()> {
+    pub fn new(start: &str, stop: &str, repeat: &[&str]) -> Self {
         assert_initialized_main_thread!();
         unsafe {
             let mut time = mem::zeroed();
-            let result = ffi::gst_sdp_time_set(
+            ffi::gst_sdp_time_set(
                 &mut time,
                 start.to_glib_none().0,
                 stop.to_glib_none().0,
                 repeat.to_glib_none().0,
             );
-            match result {
-                ffi::GST_SDP_OK => Ok(SDPTime(time)),
-                _ => Err(()),
-            }
+            SDPTime(time)
         }
     }
 
@@ -57,6 +54,12 @@ impl SDPTime {
     }
 }
 
+impl Clone for SDPTime {
+    fn clone(&self) -> Self {
+        SDPTime::new(self.start(), self.stop(), self.repeat().as_slice())
+    }
+}
+
 impl Drop for SDPTime {
     fn drop(&mut self) {
         unsafe {
@@ -64,3 +67,13 @@ impl Drop for SDPTime {
         }
     }
 }
+
+impl fmt::Debug for SDPTime {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        f.debug_struct("SDPTime")
+            .field("start", &self.start())
+            .field("stop", &self.stop())
+            .field("repeat", &self.repeat())
+            .finish()
+    }
+}
diff --git a/gstreamer-sdp/src/sdp_zone.rs b/gstreamer-sdp/src/sdp_zone.rs
index f94826b9a..1a48b4565 100644
--- a/gstreamer-sdp/src/sdp_zone.rs
+++ b/gstreamer-sdp/src/sdp_zone.rs
@@ -7,29 +7,26 @@
 // except according to those terms.
 
 use std::ffi::CStr;
+use std::fmt;
 use std::mem;
 
 use ffi;
 use glib::translate::*;
 
 #[repr(C)]
-#[derive(Debug)]
 pub struct SDPZone(pub(crate) ffi::GstSDPZone);
 
 impl SDPZone {
-    pub fn new(time: &str, typed_time: &str) -> Result<Self, ()> {
+    pub fn new(time: &str, typed_time: &str) -> Self {
         assert_initialized_main_thread!();
         unsafe {
             let mut zone = mem::zeroed();
-            let result = ffi::gst_sdp_zone_set(
+            ffi::gst_sdp_zone_set(
                 &mut zone,
                 time.to_glib_none().0,
                 typed_time.to_glib_none().0,
             );
-            match result {
-                ffi::GST_SDP_OK => Ok(SDPZone(zone)),
-                _ => Err(()),
-            }
+            SDPZone(zone)
         }
     }
 
@@ -42,6 +39,12 @@ impl SDPZone {
     }
 }
 
+impl Clone for SDPZone {
+    fn clone(&self) -> Self {
+        SDPZone::new(self.time(), self.typed_time())
+    }
+}
+
 impl Drop for SDPZone {
     fn drop(&mut self) {
         unsafe {
@@ -49,3 +52,12 @@ impl Drop for SDPZone {
         }
     }
 }
+
+impl fmt::Debug for SDPZone {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        f.debug_struct("SDPZone")
+            .field("time", &self.time())
+            .field("typed_time", &self.typed_time())
+            .finish()
+    }
+}