diff --git a/Gir_GstEditingServices.toml b/Gir_GstEditingServices.toml
index b8b584c99..fd4a07edc 100644
--- a/Gir_GstEditingServices.toml
+++ b/Gir_GstEditingServices.toml
@@ -43,17 +43,10 @@ generate = [
     "GES.Effect",
     "GES.TrackType",
     "GES.BaseEffect",
-    "GES.TimelineElement",
     "GES.Group",
-    "GES.TrackElement",
-    "GES.Layer",
-    "GES.Clip",
     "GES.UriClip",
-    "GES.Asset",
     "GES.UriClipAsset",
     "GES.UriSourceAsset",
-    "GES.Extractable",
-    "GES.Project",
 ]
 
 [[object]]
@@ -119,6 +112,10 @@ status = "generate"
         [object.function.return]
         bool_return_is_error = "Failed to move layer"
 
+    [[object.function]]
+    name = "remove_track"
+        [object.function.return]
+        bool_return_is_error = "Failed to remove track"
 
 [[object]]
 name = "GES.Container"
@@ -158,6 +155,11 @@ trait_name = "GESPipelineExt"
         [object.function.return]
         bool_return_is_error = "Failed to save thumbnail"
 
+    [[object.function]]
+    name = "set_timeline"
+        [object.function.return]
+        bool_return_is_error = "Failed to set timeline"
+
 [[object]]
 name = "GES.Track"
 status = "generate"
@@ -171,3 +173,125 @@ trait_name = "GESTrackExt"
     name = "remove_element"
         [object.function.return]
         bool_return_is_error = "Failed to remove element"
+
+[[object]]
+name = "GES.Asset"
+status = "generate"
+    [[object.function]]
+    name = "set_proxy"
+        [object.function.return]
+        bool_return_is_error = "Failed to set proxy"
+
+    [[object.function]]
+    name = "unproxy"
+        [object.function.return]
+        bool_return_is_error = "Failed to unproxy asset"
+
+[[object]]
+name = "GES.Clip"
+status = "generate"
+    [[object.function]]
+    name = "move_to_layer"
+        [object.function.return]
+        bool_return_is_error = "Failed to move clip to specified layer"
+
+    [[object.function]]
+    name = "set_top_effect_index"
+        [object.function.return]
+        bool_return_is_error = "Failed to move effect"
+
+    [[object.function]]
+    name = "set_top_effect_priority"
+        [object.function.return]
+        bool_return_is_error = "Failed to the set top effect priority"
+
+[[object]]
+name = "GES.Extractable"
+status = "generate"
+    [[object.function]]
+    name = "set_asset"
+        [object.function.return]
+        bool_return_is_error = "Failed to set asset"
+
+
+[[object]]
+name = "GES.Layer"
+status = "generate"
+    [[object.function]]
+    name = "add_clip"
+        [object.function.return]
+        bool_return_is_error = "Failed to add clip"
+
+    [[object.function]]
+    name = "remove_clip"
+        [object.function.return]
+        bool_return_is_error = "Failed to remove clip"
+
+[[object]]
+name = "GES.Project"
+status = "generate"
+    [[object.function]]
+    name = "add_encoding_profile"
+        [object.function.return]
+        bool_return_is_error = "Failed to add profile"
+
+    [[object.function]]
+    name = "remove_asset"
+        [object.function.return]
+        bool_return_is_error = "Failed to remove asset"
+
+[[object]]
+name = "GES.TimelineElement"
+status = "generate"
+    [[object.function]]
+    name = "ripple"
+        [object.function.return]
+        bool_return_is_error = "Failed to ripple"
+
+    [[object.function]]
+    name = "ripple_end"
+        [object.function.return]
+        bool_return_is_error = "Failed to ripple"
+
+    [[object.function]]
+    name = "roll_end"
+        [object.function.return]
+        bool_return_is_error = "Failed to roll"
+
+    [[object.function]]
+    name = "roll_start"
+        [object.function.return]
+        bool_return_is_error = "Failed to roll"
+
+    [[object.function]]
+    name = "set_name"
+        [object.function.return]
+        bool_return_is_error = "Failed to set name"
+
+    [[object.function]]
+    name = "set_parent"
+        [object.function.return]
+        bool_return_is_error = "`TimelineElement` already had a parent or its parent was the same as specified"
+
+    [[object.function]]
+    name = "set_timeline"
+        [object.function.return]
+        bool_return_is_error = "`Failed to set timeline"
+
+    [[object.function]]
+    name = "trim"
+        [object.function.return]
+        bool_return_is_error = "`Failed to trim"
+
+[[object]]
+name = "GES.TrackElement"
+status = "generate"
+    [[object.function]]
+    name = "edit"
+        [object.function.return]
+        bool_return_is_error = "Failed to edit"
+
+    [[object.function]]
+    name = "remove_control_binding"
+        [object.function.return]
+        bool_return_is_error = "Failed to remove control binding"
\ No newline at end of file
diff --git a/gstreamer-editing-services/src/auto/asset.rs b/gstreamer-editing-services/src/auto/asset.rs
index 8036cd71f..fc58c1c24 100644
--- a/gstreamer-editing-services/src/auto/asset.rs
+++ b/gstreamer-editing-services/src/auto/asset.rs
@@ -106,9 +106,9 @@ pub trait AssetExt: 'static {
 
     fn list_proxies(&self) -> Vec<Asset>;
 
-    fn set_proxy<'a, P: IsA<Asset> + 'a, Q: Into<Option<&'a P>>>(&self, proxy: Q) -> bool;
+    fn set_proxy<'a, P: IsA<Asset> + 'a, Q: Into<Option<&'a P>>>(&self, proxy: Q) -> Result<(), glib::error::BoolError>;
 
-    fn unproxy<P: IsA<Asset>>(&self, proxy: &P) -> bool;
+    fn unproxy<P: IsA<Asset>>(&self, proxy: &P) -> Result<(), glib::error::BoolError>;
 
     fn set_property_proxy_target<P: IsA<Asset> + glib::value::SetValueOptional>(&self, proxy_target: Option<&P>);
 
@@ -162,16 +162,16 @@ impl<O: IsA<Asset>> AssetExt for O {
         }
     }
 
-    fn set_proxy<'a, P: IsA<Asset> + 'a, Q: Into<Option<&'a P>>>(&self, proxy: Q) -> bool {
+    fn set_proxy<'a, P: IsA<Asset> + 'a, Q: Into<Option<&'a P>>>(&self, proxy: Q) -> Result<(), glib::error::BoolError> {
         let proxy = proxy.into();
         unsafe {
-            from_glib(ffi::ges_asset_set_proxy(self.as_ref().to_glib_none().0, proxy.map(|p| p.as_ref()).to_glib_none().0))
+            glib_result_from_gboolean!(ffi::ges_asset_set_proxy(self.as_ref().to_glib_none().0, proxy.map(|p| p.as_ref()).to_glib_none().0), "Failed to set proxy")
         }
     }
 
-    fn unproxy<P: IsA<Asset>>(&self, proxy: &P) -> bool {
+    fn unproxy<P: IsA<Asset>>(&self, proxy: &P) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::ges_asset_unproxy(self.as_ref().to_glib_none().0, proxy.as_ref().to_glib_none().0))
+            glib_result_from_gboolean!(ffi::ges_asset_unproxy(self.as_ref().to_glib_none().0, proxy.as_ref().to_glib_none().0), "Failed to unproxy asset")
         }
     }
 
diff --git a/gstreamer-editing-services/src/auto/clip.rs b/gstreamer-editing-services/src/auto/clip.rs
index d5eef9021..21f0f13cd 100644
--- a/gstreamer-editing-services/src/auto/clip.rs
+++ b/gstreamer-editing-services/src/auto/clip.rs
@@ -49,13 +49,13 @@ pub trait ClipExt: 'static {
 
     fn get_top_effects(&self) -> Vec<TrackElement>;
 
-    fn move_to_layer<P: IsA<Layer>>(&self, layer: &P) -> bool;
+    fn move_to_layer<P: IsA<Layer>>(&self, layer: &P) -> Result<(), glib::error::BoolError>;
 
     fn set_supported_formats(&self, supportedformats: TrackType);
 
-    fn set_top_effect_index<P: IsA<BaseEffect>>(&self, effect: &P, newindex: u32) -> bool;
+    fn set_top_effect_index<P: IsA<BaseEffect>>(&self, effect: &P, newindex: u32) -> Result<(), glib::error::BoolError>;
 
-    fn set_top_effect_priority<P: IsA<BaseEffect>>(&self, effect: &P, newpriority: u32) -> bool;
+    fn set_top_effect_priority<P: IsA<BaseEffect>>(&self, effect: &P, newpriority: u32) -> Result<(), glib::error::BoolError>;
 
     fn split(&self, position: u64) -> Option<Clip>;
 
@@ -115,9 +115,9 @@ impl<O: IsA<Clip>> ClipExt for O {
         }
     }
 
-    fn move_to_layer<P: IsA<Layer>>(&self, layer: &P) -> bool {
+    fn move_to_layer<P: IsA<Layer>>(&self, layer: &P) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::ges_clip_move_to_layer(self.as_ref().to_glib_none().0, layer.as_ref().to_glib_none().0))
+            glib_result_from_gboolean!(ffi::ges_clip_move_to_layer(self.as_ref().to_glib_none().0, layer.as_ref().to_glib_none().0), "Failed to move clip to specified layer")
         }
     }
 
@@ -127,15 +127,15 @@ impl<O: IsA<Clip>> ClipExt for O {
         }
     }
 
-    fn set_top_effect_index<P: IsA<BaseEffect>>(&self, effect: &P, newindex: u32) -> bool {
+    fn set_top_effect_index<P: IsA<BaseEffect>>(&self, effect: &P, newindex: u32) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::ges_clip_set_top_effect_index(self.as_ref().to_glib_none().0, effect.as_ref().to_glib_none().0, newindex))
+            glib_result_from_gboolean!(ffi::ges_clip_set_top_effect_index(self.as_ref().to_glib_none().0, effect.as_ref().to_glib_none().0, newindex), "Failed to move effect")
         }
     }
 
-    fn set_top_effect_priority<P: IsA<BaseEffect>>(&self, effect: &P, newpriority: u32) -> bool {
+    fn set_top_effect_priority<P: IsA<BaseEffect>>(&self, effect: &P, newpriority: u32) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::ges_clip_set_top_effect_priority(self.as_ref().to_glib_none().0, effect.as_ref().to_glib_none().0, newpriority))
+            glib_result_from_gboolean!(ffi::ges_clip_set_top_effect_priority(self.as_ref().to_glib_none().0, effect.as_ref().to_glib_none().0, newpriority), "Failed to the set top effect priority")
         }
     }
 
diff --git a/gstreamer-editing-services/src/auto/extractable.rs b/gstreamer-editing-services/src/auto/extractable.rs
index 243145c61..32b6da434 100644
--- a/gstreamer-editing-services/src/auto/extractable.rs
+++ b/gstreamer-editing-services/src/auto/extractable.rs
@@ -4,6 +4,7 @@
 
 use Asset;
 use ffi;
+use glib;
 use glib::GString;
 use glib::object::IsA;
 use glib::translate::*;
@@ -23,7 +24,7 @@ pub trait ExtractableExt: 'static {
 
     fn get_id(&self) -> Option<GString>;
 
-    fn set_asset<P: IsA<Asset>>(&self, asset: &P) -> bool;
+    fn set_asset<P: IsA<Asset>>(&self, asset: &P) -> Result<(), glib::error::BoolError>;
 }
 
 impl<O: IsA<Extractable>> ExtractableExt for O {
@@ -39,9 +40,9 @@ impl<O: IsA<Extractable>> ExtractableExt for O {
         }
     }
 
-    fn set_asset<P: IsA<Asset>>(&self, asset: &P) -> bool {
+    fn set_asset<P: IsA<Asset>>(&self, asset: &P) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::ges_extractable_set_asset(self.as_ref().to_glib_none().0, asset.as_ref().to_glib_none().0))
+            glib_result_from_gboolean!(ffi::ges_extractable_set_asset(self.as_ref().to_glib_none().0, asset.as_ref().to_glib_none().0), "Failed to set asset")
         }
     }
 }
diff --git a/gstreamer-editing-services/src/auto/layer.rs b/gstreamer-editing-services/src/auto/layer.rs
index 876361c73..9acc932d9 100644
--- a/gstreamer-editing-services/src/auto/layer.rs
+++ b/gstreamer-editing-services/src/auto/layer.rs
@@ -8,6 +8,7 @@ use Extractable;
 use Timeline;
 use TrackType;
 use ffi;
+use glib;
 use glib::object::Cast;
 use glib::object::IsA;
 use glib::signal::SignalHandlerId;
@@ -46,7 +47,7 @@ pub const NONE_LAYER: Option<&Layer> = None;
 pub trait LayerExt: 'static {
     fn add_asset<P: IsA<Asset>>(&self, asset: &P, start: gst::ClockTime, inpoint: gst::ClockTime, duration: gst::ClockTime, track_types: TrackType) -> Option<Clip>;
 
-    fn add_clip<P: IsA<Clip>>(&self, clip: &P) -> bool;
+    fn add_clip<P: IsA<Clip>>(&self, clip: &P) -> Result<(), glib::error::BoolError>;
 
     fn get_auto_transition(&self) -> bool;
 
@@ -62,7 +63,7 @@ pub trait LayerExt: 'static {
 
     fn is_empty(&self) -> bool;
 
-    fn remove_clip<P: IsA<Clip>>(&self, clip: &P) -> bool;
+    fn remove_clip<P: IsA<Clip>>(&self, clip: &P) -> Result<(), glib::error::BoolError>;
 
     fn set_auto_transition(&self, auto_transition: bool);
 
@@ -88,9 +89,9 @@ impl<O: IsA<Layer>> LayerExt for O {
         }
     }
 
-    fn add_clip<P: IsA<Clip>>(&self, clip: &P) -> bool {
+    fn add_clip<P: IsA<Clip>>(&self, clip: &P) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::ges_layer_add_clip(self.as_ref().to_glib_none().0, clip.as_ref().to_glib_none().0))
+            glib_result_from_gboolean!(ffi::ges_layer_add_clip(self.as_ref().to_glib_none().0, clip.as_ref().to_glib_none().0), "Failed to add clip")
         }
     }
 
@@ -136,9 +137,9 @@ impl<O: IsA<Layer>> LayerExt for O {
         }
     }
 
-    fn remove_clip<P: IsA<Clip>>(&self, clip: &P) -> bool {
+    fn remove_clip<P: IsA<Clip>>(&self, clip: &P) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::ges_layer_remove_clip(self.as_ref().to_glib_none().0, clip.as_ref().to_glib_none().0))
+            glib_result_from_gboolean!(ffi::ges_layer_remove_clip(self.as_ref().to_glib_none().0, clip.as_ref().to_glib_none().0), "Failed to remove clip")
         }
     }
 
diff --git a/gstreamer-editing-services/src/auto/pipeline.rs b/gstreamer-editing-services/src/auto/pipeline.rs
index 61b8caf2a..8cfb99082 100644
--- a/gstreamer-editing-services/src/auto/pipeline.rs
+++ b/gstreamer-editing-services/src/auto/pipeline.rs
@@ -68,7 +68,7 @@ pub trait GESPipelineExt: 'static {
 
     fn set_render_settings<P: IsA<gst_pbutils::EncodingProfile>>(&self, output_uri: &str, profile: &P) -> Result<(), glib::error::BoolError>;
 
-    fn set_timeline<P: IsA<Timeline>>(&self, timeline: &P) -> bool;
+    fn set_timeline<P: IsA<Timeline>>(&self, timeline: &P) -> Result<(), glib::error::BoolError>;
 
     fn get_property_audio_filter(&self) -> Option<gst::Element>;
 
@@ -164,9 +164,9 @@ impl<O: IsA<Pipeline>> GESPipelineExt for O {
         }
     }
 
-    fn set_timeline<P: IsA<Timeline>>(&self, timeline: &P) -> bool {
+    fn set_timeline<P: IsA<Timeline>>(&self, timeline: &P) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::ges_pipeline_set_timeline(self.as_ref().to_glib_none().0, timeline.as_ref().to_glib_full()))
+            glib_result_from_gboolean!(ffi::ges_pipeline_set_timeline(self.as_ref().to_glib_none().0, timeline.as_ref().to_glib_full()), "Failed to set timeline")
         }
     }
 
diff --git a/gstreamer-editing-services/src/auto/project.rs b/gstreamer-editing-services/src/auto/project.rs
index 95c326402..213156bfe 100644
--- a/gstreamer-editing-services/src/auto/project.rs
+++ b/gstreamer-editing-services/src/auto/project.rs
@@ -43,7 +43,7 @@ pub const NONE_PROJECT: Option<&Project> = None;
 pub trait ProjectExt: 'static {
     fn add_asset<P: IsA<Asset>>(&self, asset: &P) -> bool;
 
-    fn add_encoding_profile<P: IsA<gst_pbutils::EncodingProfile>>(&self, profile: &P) -> bool;
+    fn add_encoding_profile<P: IsA<gst_pbutils::EncodingProfile>>(&self, profile: &P) -> Result<(), glib::error::BoolError>;
 
     fn create_asset<'a, P: Into<Option<&'a str>>>(&self, id: P, extractable_type: glib::types::Type) -> bool;
 
@@ -61,7 +61,7 @@ pub trait ProjectExt: 'static {
 
     fn load<P: IsA<Timeline>>(&self, timeline: &P) -> Result<(), Error>;
 
-    fn remove_asset<P: IsA<Asset>>(&self, asset: &P) -> bool;
+    fn remove_asset<P: IsA<Asset>>(&self, asset: &P) -> Result<(), glib::error::BoolError>;
 
     fn save<'a, P: IsA<Timeline>, Q: IsA<Asset> + 'a, R: Into<Option<&'a Q>>>(&self, timeline: &P, uri: &str, formatter_asset: R, overwrite: bool) -> Result<(), Error>;
 
@@ -85,9 +85,9 @@ impl<O: IsA<Project>> ProjectExt for O {
         }
     }
 
-    fn add_encoding_profile<P: IsA<gst_pbutils::EncodingProfile>>(&self, profile: &P) -> bool {
+    fn add_encoding_profile<P: IsA<gst_pbutils::EncodingProfile>>(&self, profile: &P) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::ges_project_add_encoding_profile(self.as_ref().to_glib_none().0, profile.as_ref().to_glib_none().0))
+            glib_result_from_gboolean!(ffi::ges_project_add_encoding_profile(self.as_ref().to_glib_none().0, profile.as_ref().to_glib_none().0), "Failed to add profile")
         }
     }
 
@@ -145,9 +145,9 @@ impl<O: IsA<Project>> ProjectExt for O {
         }
     }
 
-    fn remove_asset<P: IsA<Asset>>(&self, asset: &P) -> bool {
+    fn remove_asset<P: IsA<Asset>>(&self, asset: &P) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::ges_project_remove_asset(self.as_ref().to_glib_none().0, asset.as_ref().to_glib_none().0))
+            glib_result_from_gboolean!(ffi::ges_project_remove_asset(self.as_ref().to_glib_none().0, asset.as_ref().to_glib_none().0), "Failed to remove asset")
         }
     }
 
diff --git a/gstreamer-editing-services/src/auto/timeline.rs b/gstreamer-editing-services/src/auto/timeline.rs
index d6366e45d..c4e6e536a 100644
--- a/gstreamer-editing-services/src/auto/timeline.rs
+++ b/gstreamer-editing-services/src/auto/timeline.rs
@@ -105,7 +105,7 @@ pub trait TimelineExt: 'static {
 
     fn remove_layer<P: IsA<Layer>>(&self, layer: &P) -> Result<(), glib::error::BoolError>;
 
-    fn remove_track<P: IsA<Track>>(&self, track: &P) -> bool;
+    fn remove_track<P: IsA<Track>>(&self, track: &P) -> Result<(), glib::error::BoolError>;
 
     fn save_to_uri<'a, P: IsA<Asset> + 'a, Q: Into<Option<&'a P>>>(&self, uri: &str, formatter_asset: Q, overwrite: bool) -> Result<(), Error>;
 
@@ -263,9 +263,9 @@ impl<O: IsA<Timeline>> TimelineExt for O {
         }
     }
 
-    fn remove_track<P: IsA<Track>>(&self, track: &P) -> bool {
+    fn remove_track<P: IsA<Track>>(&self, track: &P) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::ges_timeline_remove_track(self.as_ref().to_glib_none().0, track.as_ref().to_glib_none().0))
+            glib_result_from_gboolean!(ffi::ges_timeline_remove_track(self.as_ref().to_glib_none().0, track.as_ref().to_glib_none().0), "Failed to remove track")
         }
     }
 
diff --git a/gstreamer-editing-services/src/auto/timeline_element.rs b/gstreamer-editing-services/src/auto/timeline_element.rs
index dbb88d9ab..5f0c28498 100644
--- a/gstreamer-editing-services/src/auto/timeline_element.rs
+++ b/gstreamer-editing-services/src/auto/timeline_element.rs
@@ -6,6 +6,7 @@ use Extractable;
 use Timeline;
 use TrackType;
 use ffi;
+use glib;
 use glib::GString;
 use glib::StaticType;
 use glib::Value;
@@ -71,13 +72,13 @@ pub trait TimelineElementExt: 'static {
 
     //fn remove_child_property(&self, pspec: /*Ignored*/&glib::ParamSpec) -> bool;
 
-    fn ripple(&self, start: gst::ClockTime) -> bool;
+    fn ripple(&self, start: gst::ClockTime) -> Result<(), glib::error::BoolError>;
 
-    fn ripple_end(&self, end: gst::ClockTime) -> bool;
+    fn ripple_end(&self, end: gst::ClockTime) -> Result<(), glib::error::BoolError>;
 
-    fn roll_end(&self, end: gst::ClockTime) -> bool;
+    fn roll_end(&self, end: gst::ClockTime) -> Result<(), glib::error::BoolError>;
 
-    fn roll_start(&self, start: gst::ClockTime) -> bool;
+    fn roll_start(&self, start: gst::ClockTime) -> Result<(), glib::error::BoolError>;
 
     //fn set_child_properties(&self, first_property_name: &str, : /*Unknown conversion*//*Unimplemented*/Fundamental: VarArgs);
 
@@ -93,17 +94,17 @@ pub trait TimelineElementExt: 'static {
 
     fn set_max_duration(&self, maxduration: gst::ClockTime);
 
-    fn set_name<'a, P: Into<Option<&'a str>>>(&self, name: P) -> bool;
+    fn set_name<'a, P: Into<Option<&'a str>>>(&self, name: P) -> Result<(), glib::error::BoolError>;
 
-    fn set_parent<P: IsA<TimelineElement>>(&self, parent: &P) -> bool;
+    fn set_parent<P: IsA<TimelineElement>>(&self, parent: &P) -> Result<(), glib::error::BoolError>;
 
     fn set_priority(&self, priority: u32);
 
     fn set_start(&self, start: gst::ClockTime);
 
-    fn set_timeline<P: IsA<Timeline>>(&self, timeline: &P) -> bool;
+    fn set_timeline<P: IsA<Timeline>>(&self, timeline: &P) -> Result<(), glib::error::BoolError>;
 
-    fn trim(&self, start: gst::ClockTime) -> bool;
+    fn trim(&self, start: gst::ClockTime) -> Result<(), glib::error::BoolError>;
 
     fn get_property_in_point(&self) -> u64;
 
@@ -239,27 +240,27 @@ impl<O: IsA<TimelineElement>> TimelineElementExt for O {
     //    unsafe { TODO: call ffi::ges_timeline_element_remove_child_property() }
     //}
 
-    fn ripple(&self, start: gst::ClockTime) -> bool {
+    fn ripple(&self, start: gst::ClockTime) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::ges_timeline_element_ripple(self.as_ref().to_glib_none().0, start.to_glib()))
+            glib_result_from_gboolean!(ffi::ges_timeline_element_ripple(self.as_ref().to_glib_none().0, start.to_glib()), "Failed to ripple")
         }
     }
 
-    fn ripple_end(&self, end: gst::ClockTime) -> bool {
+    fn ripple_end(&self, end: gst::ClockTime) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::ges_timeline_element_ripple_end(self.as_ref().to_glib_none().0, end.to_glib()))
+            glib_result_from_gboolean!(ffi::ges_timeline_element_ripple_end(self.as_ref().to_glib_none().0, end.to_glib()), "Failed to ripple")
         }
     }
 
-    fn roll_end(&self, end: gst::ClockTime) -> bool {
+    fn roll_end(&self, end: gst::ClockTime) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::ges_timeline_element_roll_end(self.as_ref().to_glib_none().0, end.to_glib()))
+            glib_result_from_gboolean!(ffi::ges_timeline_element_roll_end(self.as_ref().to_glib_none().0, end.to_glib()), "Failed to roll")
         }
     }
 
-    fn roll_start(&self, start: gst::ClockTime) -> bool {
+    fn roll_start(&self, start: gst::ClockTime) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::ges_timeline_element_roll_start(self.as_ref().to_glib_none().0, start.to_glib()))
+            glib_result_from_gboolean!(ffi::ges_timeline_element_roll_start(self.as_ref().to_glib_none().0, start.to_glib()), "Failed to roll")
         }
     }
 
@@ -297,16 +298,16 @@ impl<O: IsA<TimelineElement>> TimelineElementExt for O {
         }
     }
 
-    fn set_name<'a, P: Into<Option<&'a str>>>(&self, name: P) -> bool {
+    fn set_name<'a, P: Into<Option<&'a str>>>(&self, name: P) -> Result<(), glib::error::BoolError> {
         let name = name.into();
         unsafe {
-            from_glib(ffi::ges_timeline_element_set_name(self.as_ref().to_glib_none().0, name.to_glib_none().0))
+            glib_result_from_gboolean!(ffi::ges_timeline_element_set_name(self.as_ref().to_glib_none().0, name.to_glib_none().0), "Failed to set name")
         }
     }
 
-    fn set_parent<P: IsA<TimelineElement>>(&self, parent: &P) -> bool {
+    fn set_parent<P: IsA<TimelineElement>>(&self, parent: &P) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::ges_timeline_element_set_parent(self.as_ref().to_glib_none().0, parent.as_ref().to_glib_none().0))
+            glib_result_from_gboolean!(ffi::ges_timeline_element_set_parent(self.as_ref().to_glib_none().0, parent.as_ref().to_glib_none().0), "`TimelineElement` already had a parent or its parent was the same as specified")
         }
     }
 
@@ -322,15 +323,15 @@ impl<O: IsA<TimelineElement>> TimelineElementExt for O {
         }
     }
 
-    fn set_timeline<P: IsA<Timeline>>(&self, timeline: &P) -> bool {
+    fn set_timeline<P: IsA<Timeline>>(&self, timeline: &P) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::ges_timeline_element_set_timeline(self.as_ref().to_glib_none().0, timeline.as_ref().to_glib_none().0))
+            glib_result_from_gboolean!(ffi::ges_timeline_element_set_timeline(self.as_ref().to_glib_none().0, timeline.as_ref().to_glib_none().0), "`Failed to set timeline")
         }
     }
 
-    fn trim(&self, start: gst::ClockTime) -> bool {
+    fn trim(&self, start: gst::ClockTime) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::ges_timeline_element_trim(self.as_ref().to_glib_none().0, start.to_glib()))
+            glib_result_from_gboolean!(ffi::ges_timeline_element_trim(self.as_ref().to_glib_none().0, start.to_glib()), "`Failed to trim")
         }
     }
 
diff --git a/gstreamer-editing-services/src/auto/track_element.rs b/gstreamer-editing-services/src/auto/track_element.rs
index 2cb9356b3..17eda213c 100644
--- a/gstreamer-editing-services/src/auto/track_element.rs
+++ b/gstreamer-editing-services/src/auto/track_element.rs
@@ -10,6 +10,7 @@ use TimelineElement;
 use Track;
 use TrackType;
 use ffi;
+use glib;
 use glib::GString;
 use glib::StaticType;
 use glib::Value;
@@ -37,7 +38,7 @@ pub const NONE_TRACK_ELEMENT: Option<&TrackElement> = None;
 pub trait TrackElementExt: 'static {
     fn add_children_props<P: IsA<gst::Element>>(&self, element: &P, wanted_categories: &[&str], blacklist: &[&str], whitelist: &[&str]);
 
-    fn edit(&self, layers: &[Layer], mode: EditMode, edge: Edge, position: u64) -> bool;
+    fn edit(&self, layers: &[Layer], mode: EditMode, edge: Edge, position: u64) -> Result<(), glib::error::BoolError>;
 
     //fn get_all_control_bindings(&self) -> /*Unknown conversion*//*Unimplemented*/HashTable TypeId { ns_id: 0, id: 28 }/TypeId { ns_id: 6, id: 83 };
 
@@ -57,7 +58,7 @@ pub trait TrackElementExt: 'static {
 
     //fn lookup_child(&self, prop_name: &str, pspec: /*Ignored*/glib::ParamSpec) -> Option<gst::Element>;
 
-    fn remove_control_binding(&self, property_name: &str) -> bool;
+    fn remove_control_binding(&self, property_name: &str) -> Result<(), glib::error::BoolError>;
 
     fn set_active(&self, active: bool) -> bool;
 
@@ -85,9 +86,9 @@ impl<O: IsA<TrackElement>> TrackElementExt for O {
         }
     }
 
-    fn edit(&self, layers: &[Layer], mode: EditMode, edge: Edge, position: u64) -> bool {
+    fn edit(&self, layers: &[Layer], mode: EditMode, edge: Edge, position: u64) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::ges_track_element_edit(self.as_ref().to_glib_none().0, layers.to_glib_none().0, mode.to_glib(), edge.to_glib(), position))
+            glib_result_from_gboolean!(ffi::ges_track_element_edit(self.as_ref().to_glib_none().0, layers.to_glib_none().0, mode.to_glib(), edge.to_glib(), position), "Failed to edit")
         }
     }
 
@@ -139,9 +140,9 @@ impl<O: IsA<TrackElement>> TrackElementExt for O {
     //    unsafe { TODO: call ffi::ges_track_element_lookup_child() }
     //}
 
-    fn remove_control_binding(&self, property_name: &str) -> bool {
+    fn remove_control_binding(&self, property_name: &str) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::ges_track_element_remove_control_binding(self.as_ref().to_glib_none().0, property_name.to_glib_none().0))
+            glib_result_from_gboolean!(ffi::ges_track_element_remove_control_binding(self.as_ref().to_glib_none().0, property_name.to_glib_none().0), "Failed to remove control binding")
         }
     }