pub struct TrackElement { /* private fields */ }
Expand description

A TrackElement is a TimelineElement that specifically belongs to a single Track of its timeline. Its start and duration specify its temporal extent in the track. Specifically, a track element wraps some nleobject, such as an nlesource or nleoperation, which can be retrieved with TrackElementExt::nleobject(), and its start, duration, in-point, priority and active properties expose the corresponding nleobject properties. When a track element is added to a track, its nleobject is added to the corresponding nlecomposition that the track wraps.

Most users will not have to work directly with track elements since a Clip will automatically create track elements for its timeline’s tracks and take responsibility for updating them. The only track elements that are not automatically created by clips, but a user is likely to want to create, are Effect-s.

§Control Bindings for Children Properties

You can set up control bindings for a track element child property using TrackElementExt::set_control_source(). A GstTimedValueControlSource should specify the timed values using the internal source coordinates (see TimelineElement). By default, these will be updated to lie between the in-point and out-point of the element. This can be switched off by setting auto-clamp-control-sources to false.

This is an Abstract Base Class, you cannot instantiate it.

§Properties

§active

Whether the effect of the element should be applied in its track. If set to false, it will not be used in the output of the track.

Readable | Writeable

§auto-clamp-control-sources

Whether the control sources on the element (see TrackElementExt::set_control_source()) will be automatically updated whenever the in-point or out-point of the element change in value.

See TrackElementExt::clamp_control_source() for how this is done per control source.

Default value: true

Readable | Writeable

§has-internal-source

This property is used to determine whether the ‘internal time’ properties of the element have any meaning. In particular, unless this is set to true, the in-point and max-duration can not be set to any value other than the default 0 and GST_CLOCK_TIME_NONE, respectively.

If an element has some internal timed source gst::Element that it reads stream data from as part of its function in a Track, then you’ll likely want to set this to true to allow the in-point and max-duration to be set.

The default value is determined by the GESTrackElementClass default_has_internal_source class property. For most GESSourceClass-es, this will be true, with the exception of those that have a potentially static source, such as GESImageSourceClass and GESTitleSourceClass. Otherwise, this will usually be false.

For most Operation-s you will likely want to leave this set to false. The exception may be for an operation that reads some stream data from some private internal source as part of manipulating the input data from the usual linked upstream TrackElement.

For example, you may want to set this to true for a TrackType::VIDEO operation that wraps a textoverlay that reads from a subtitle file and places its text on top of the received video data. The in-point of the element would be used to shift the initial seek time on the textoverlay away from 0, and the max-duration could be set to reflect the time at which the subtitle file runs out of data.

Note that GES can not support track elements that have both internal content and manipulate the timing of their data streams (time effects).

Readable | Writeable

§track

The track that this element belongs to, or None if it does not belong to a track.

Readable

§track-type

The track type of the element, which determines the type of track the element can be added to (see track-type). This should correspond to the type of data that the element can produce or process.

Readable | Writeable | Construct

TimelineElement

§duration

The duration that the element is in effect for in the timeline (a time difference in nanoseconds using the time coordinates of the timeline). For example, for a source element, this would determine for how long it should output its internal content for. For an operation element, this would determine for how long its effect should be applied to any source content.

Readable | Writeable

§in-point

The initial offset to use internally when outputting content (in nanoseconds, but in the time coordinates of the internal content).

For example, for a VideoUriSource that references some media file, the “internal content” is the media file data, and the in-point would correspond to some timestamp in the media file. When playing the timeline, and when the element is first reached at timeline-time start, it will begin outputting the data from the timestamp in-point onwards, until it reaches the end of its duration in the timeline.

For elements that have no internal content, this should be kept as 0.

Readable | Writeable

§max-duration

The full duration of internal content that is available (a time difference in nanoseconds using the time coordinates of the internal content).

This will act as a cap on the in-point of the element (which is in the same time coordinates), and will sometimes be used to limit the duration of the element in the timeline.

For example, for a VideoUriSource that references some media file, this would be the length of the media file.

For elements that have no internal content, or whose content is indefinite, this should be kept as GST_CLOCK_TIME_NONE.

Readable | Writeable | Construct

§name

The name of the element. This should be unique within its timeline.

Readable | Writeable | Construct

§parent

The parent container of the element.

Readable | Writeable

§priority

The priority of the element.

Readable | Writeable

§serialize

Whether the element should be serialized.

Readable | Writeable

§start

The starting position of the element in the timeline (in nanoseconds and in the time coordinates of the timeline). For example, for a source element, this would determine the time at which it should start outputting its internal content. For an operation element, this would determine the time at which it should start applying its effect to any source content.

Readable | Writeable

§timeline

The timeline that the element lies within.

Readable | Writeable

§Signals

§control-binding-added

This is emitted when a control binding is added to a child property of the track element.

§control-binding-removed

This is emitted when a control binding is removed from a child property of the track element.

TimelineElement

§child-property-added

Emitted when the element has a new child property registered. See TimelineElementExt::add_child_property().

Note that some GES elements will be automatically created with pre-registered children properties. You can use TimelineElementExt::list_children_properties() to list these.

§child-property-removed

Emitted when the element has a child property unregistered. See TimelineElementExt::remove_child_property().

§deep-notify

Emitted when a child of the element has one of its registered properties set. See TimelineElementExt::add_child_property(). Note that unlike notify, a child property name can not be used as a signal detail.

Detailed

MetaContainer

§notify-meta

This is emitted for a meta container whenever the metadata under one of its fields changes, is set for the first time, or is removed. In the latter case, value will be None.

Detailed

§Implements

TrackElementExt, TimelineElementExt, [trait@glib::ObjectExt], ExtractableExt, MetaContainerExt, [TimelineElementExtManual][trait@crate::prelude::TimelineElementExtManual]

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impl TrackElement

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pub const NONE: Option<&'static TrackElement> = None

Trait Implementations§

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impl Clone for TrackElement

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fn clone(&self) -> Self

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for TrackElement

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl HasParamSpec for TrackElement

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type ParamSpec = ParamSpecObject

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type SetValue = TrackElement

Preferred value to be used as setter for the associated ParamSpec.
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type BuilderFn = fn(_: &str) -> ParamSpecObjectBuilder<'_, TrackElement>

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fn param_spec_builder() -> Self::BuilderFn

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impl Hash for TrackElement

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fn hash<H>(&self, state: &mut H)
where H: Hasher,

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl Ord for TrackElement

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fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
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impl ParentClassIs for TrackElement

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impl<OT: ObjectType> PartialEq<OT> for TrackElement

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fn eq(&self, other: &OT) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<OT: ObjectType> PartialOrd<OT> for TrackElement

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fn partial_cmp(&self, other: &OT) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl StaticType for TrackElement

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fn static_type() -> Type

Returns the type identifier of Self.
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impl Eq for TrackElement

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impl IsA<Extractable> for TrackElement

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impl IsA<MetaContainer> for TrackElement

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impl IsA<TimelineElement> for TrackElement

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impl IsA<TrackElement> for AudioSource

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impl IsA<TrackElement> for AudioTestSource

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impl IsA<TrackElement> for AudioTransition

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impl IsA<TrackElement> for AudioUriSource

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impl IsA<TrackElement> for BaseEffect

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impl IsA<TrackElement> for Effect

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impl IsA<TrackElement> for ImageSource

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impl IsA<TrackElement> for MultiFileSource

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impl IsA<TrackElement> for Operation

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impl IsA<TrackElement> for Source

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impl IsA<TrackElement> for TextOverlay

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impl IsA<TrackElement> for TitleSource

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impl IsA<TrackElement> for Transition

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impl IsA<TrackElement> for VideoSource

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impl IsA<TrackElement> for VideoTestSource

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impl IsA<TrackElement> for VideoTransition

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impl IsA<TrackElement> for VideoUriSource

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> Cast for T
where T: ObjectType,

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fn upcast<T>(self) -> T
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Upcasts an object to a superclass or interface T. Read more
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Upcasts an object to a reference of its superclass or interface T. Read more
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where T: ObjectType, Self: MayDowncastTo<T>,

Tries to downcast to a subclass or interface implementor T. Read more
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where T: ObjectType, Self: MayDowncastTo<T>,

Tries to downcast to a reference of its subclass or interface implementor T. Read more
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fn dynamic_cast<T>(self) -> Result<T, Self>
where T: ObjectType,

Tries to cast to an object of type T. This handles upcasting, downcasting and casting between interface and interface implementors. All checks are performed at runtime, while upcast will do many checks at compile-time already. downcast will perform the same checks at runtime as dynamic_cast, but will also ensure some amount of compile-time safety. Read more
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fn dynamic_cast_ref<T>(&self) -> Option<&T>
where T: ObjectType,

Tries to cast to reference to an object of type T. This handles upcasting, downcasting and casting between interface and interface implementors. All checks are performed at runtime, while downcast and upcast will do many checks at compile-time already. Read more
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unsafe fn unsafe_cast<T>(self) -> T
where T: ObjectType,

Casts to T unconditionally. Read more
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unsafe fn unsafe_cast_ref<T>(&self) -> &T
where T: ObjectType,

Casts to &T unconditionally. Read more
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impl<O> ExtractableExt for O
where O: IsA<Extractable>,

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fn asset(&self) -> Option<Asset>

Get the asset that has been set on the extractable object. Read more
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fn id(&self) -> GString

Gets the id of some associated asset. It may be the case that the object has no set asset, or even that such an asset does not yet exist in the GES cache. Instead, this will return the asset id that is compatible with the current state of the object, as determined by the Extractable implementer. If it was indeed extracted from an asset, this should return the same as its corresponding asset id. Read more
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fn set_asset(&self, asset: &impl IsA<Asset>) -> Result<(), BoolError>

Sets the asset for this extractable object. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> FromGlibContainerAsVec<<T as GlibPtrDefault>::GlibType, *const GList> for T

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unsafe fn from_glib_full_num_as_vec(ptr: *mut GList, num: usize) -> Vec<T>

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impl<T> FromGlibContainerAsVec<<T as GlibPtrDefault>::GlibType, *mut GPtrArray> for T

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unsafe fn from_glib_full_num_as_vec(ptr: *mut GPtrArray, num: usize) -> Vec<T>

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impl<T> FromGlibContainerAsVec<<T as GlibPtrDefault>::GlibType, *mut GSList> for T

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unsafe fn from_glib_none_num_as_vec(ptr: *mut GSList, num: usize) -> Vec<T>

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unsafe fn from_glib_full_num_as_vec(ptr: *mut GSList, num: usize) -> Vec<T>

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impl<T> FromGlibPtrArrayContainerAsVec<<T as GlibPtrDefault>::GlibType, *const GList> for T

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impl<T> FromGlibPtrArrayContainerAsVec<<T as GlibPtrDefault>::GlibType, *const GPtrArray> for T

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unsafe fn from_glib_none_as_vec(ptr: *const GPtrArray) -> Vec<T>

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impl<T> FromGlibPtrArrayContainerAsVec<<T as GlibPtrDefault>::GlibType, *const GSList> for T

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unsafe fn from_glib_none_as_vec(ptr: *const GSList) -> Vec<T>

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unsafe fn from_glib_container_as_vec(_: *const GSList) -> Vec<T>

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unsafe fn from_glib_none_as_vec(ptr: *mut GList) -> Vec<T>

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impl<O> GObjectExtManualGst for O
where O: IsA<Object>,

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fn set_property_from_str(&self, name: &str, value: &str)

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoClosureReturnValue for T
where T: Into<Value>,

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impl<U> IsSubclassableExt for U

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impl<O> MetaContainerExt for O
where O: IsA<MetaContainer>,

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fn add_metas_from_string(&self, str: &str) -> bool

Deserializes the given string, and adds and sets the found fields and their values on the container. The string should be the return of metas_to_string(). Read more
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fn check_meta_registered(&self, meta_item: &str) -> Option<(MetaFlag, Type)>

Checks whether the specified field has been registered as static, and gets the registered type and flags of the field, as used in register_meta() and register_static_meta(). Read more
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fn foreach<P: FnMut(&MetaContainer, &str, &Value)>(&self, func: P)

Calls the given function on each of the meta container’s set metadata fields. Read more
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fn boolean(&self, meta_item: &str) -> Option<bool>

Gets the current boolean value of the specified field of the meta container. If the field does not have a set value, or it is of the wrong type, the method will fail. Read more
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fn date(&self, meta_item: &str) -> Option<Date>

Gets the current date value of the specified field of the meta container. If the field does not have a set value, or it is of the wrong type, the method will fail. Read more
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fn date_time(&self, meta_item: &str) -> Option<DateTime>

Gets the current date time value of the specified field of the meta container. If the field does not have a set value, or it is of the wrong type, the method will fail. Read more
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fn double(&self, meta_item: &str) -> Option<f64>

Gets the current double value of the specified field of the meta container. If the field does not have a set value, or it is of the wrong type, the method will fail. Read more
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fn float(&self, meta_item: &str) -> Option<f32>

Gets the current float value of the specified field of the meta container. If the field does not have a set value, or it is of the wrong type, the method will fail. Read more
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fn int(&self, meta_item: &str) -> Option<i32>

Gets the current int value of the specified field of the meta container. If the field does not have a set value, or it is of the wrong type, the method will fail. Read more
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fn int64(&self, meta_item: &str) -> Option<i64>

Gets the current int64 value of the specified field of the meta container. If the field does not have a set value, or it is of the wrong type, the method will fail. Read more
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fn marker_list(&self, key: &str) -> Option<MarkerList>

Gets the current marker list value of the specified field of the meta container. If the field does not have a set value, or it is of the wrong type, the method will fail. Read more
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fn meta(&self, key: &str) -> Option<Value>

Gets the current value of the specified field of the meta container. Read more
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fn string(&self, meta_item: &str) -> Option<GString>

Gets the current string value of the specified field of the meta container. If the field does not have a set value, or it is of the wrong type, the method will fail. Read more
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fn uint(&self, meta_item: &str) -> Option<u32>

Gets the current uint value of the specified field of the meta container. If the field does not have a set value, or it is of the wrong type, the method will fail. Read more
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fn uint64(&self, meta_item: &str) -> Option<u64>

Gets the current uint64 value of the specified field of the meta container. If the field does not have a set value, or it is of the wrong type, the method will fail. Read more
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fn metas_to_string(&self) -> GString

Serializes the set metadata fields of the meta container to a string. Read more
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fn register_meta(&self, flags: MetaFlag, meta_item: &str, value: &Value) -> bool

Sets the value of the specified field of the meta container to the given value, and registers the field to only hold a value of the same type. After calling this, only values of the same type as value can be set for this field. The given flags can be set to make this field only readable after calling this method. Read more
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fn register_meta_boolean( &self, flags: MetaFlag, meta_item: &str, value: bool ) -> bool

Sets the value of the specified field of the meta container to the given boolean value, and registers the field to only hold a boolean typed value. After calling this, only boolean values can be set for this field. The given flags can be set to make this field only readable after calling this method. Read more
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fn register_meta_date( &self, flags: MetaFlag, meta_item: &str, value: &Date ) -> bool

Sets the value of the specified field of the meta container to the given date value, and registers the field to only hold a date typed value. After calling this, only date values can be set for this field. The given flags can be set to make this field only readable after calling this method. Read more
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fn register_meta_date_time( &self, flags: MetaFlag, meta_item: &str, value: &DateTime ) -> bool

Sets the value of the specified field of the meta container to the given date time value, and registers the field to only hold a date time typed value. After calling this, only date time values can be set for this field. The given flags can be set to make this field only readable after calling this method. Read more
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fn register_meta_double( &self, flags: MetaFlag, meta_item: &str, value: f64 ) -> bool

Sets the value of the specified field of the meta container to the given double value, and registers the field to only hold a double typed value. After calling this, only double values can be set for this field. The given flags can be set to make this field only readable after calling this method. Read more
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fn register_meta_float( &self, flags: MetaFlag, meta_item: &str, value: f32 ) -> bool

Sets the value of the specified field of the meta container to the given float value, and registers the field to only hold a float typed value. After calling this, only float values can be set for this field. The given flags can be set to make this field only readable after calling this method. Read more
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fn register_meta_int( &self, flags: MetaFlag, meta_item: &str, value: i32 ) -> bool

Sets the value of the specified field of the meta container to the given int value, and registers the field to only hold an int typed value. After calling this, only int values can be set for this field. The given flags can be set to make this field only readable after calling this method. Read more
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fn register_meta_int64( &self, flags: MetaFlag, meta_item: &str, value: i64 ) -> bool

Sets the value of the specified field of the meta container to the given int64 value, and registers the field to only hold an int64 typed value. After calling this, only int64 values can be set for this field. The given flags can be set to make this field only readable after calling this method. Read more
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fn register_meta_string( &self, flags: MetaFlag, meta_item: &str, value: &str ) -> bool

Sets the value of the specified field of the meta container to the given string value, and registers the field to only hold a string typed value. After calling this, only string values can be set for this field. The given flags can be set to make this field only readable after calling this method. Read more
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fn register_meta_uint( &self, flags: MetaFlag, meta_item: &str, value: u32 ) -> bool

Sets the value of the specified field of the meta container to the given uint value, and registers the field to only hold a uint typed value. After calling this, only uint values can be set for this field. The given flags can be set to make this field only readable after calling this method. Read more
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fn register_meta_uint64( &self, flags: MetaFlag, meta_item: &str, value: u64 ) -> bool

Sets the value of the specified field of the meta container to the given uint64 value, and registers the field to only hold a uint64 typed value. After calling this, only uint64 values can be set for this field. The given flags can be set to make this field only readable after calling this method. Read more
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fn register_static_meta( &self, flags: MetaFlag, meta_item: &str, type_: Type ) -> bool

Registers a static metadata field on the container to only hold the specified type. After calling this, setting a value under this field can only succeed if its type matches the registered type of the field. Read more
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fn set_boolean(&self, meta_item: &str, value: bool) -> bool

Sets the value of the specified field of the meta container to the given boolean value. Read more
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fn set_date(&self, meta_item: &str, value: &Date) -> bool

Sets the value of the specified field of the meta container to the given date value. Read more
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fn set_date_time(&self, meta_item: &str, value: &DateTime) -> bool

Sets the value of the specified field of the meta container to the given date time value. Read more
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fn set_double(&self, meta_item: &str, value: f64) -> bool

Sets the value of the specified field of the meta container to the given double value. Read more
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fn set_float(&self, meta_item: &str, value: f32) -> bool

Sets the value of the specified field of the meta container to the given float value. Read more
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fn set_int(&self, meta_item: &str, value: i32) -> bool

Sets the value of the specified field of the meta container to the given int value. Read more
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fn set_int64(&self, meta_item: &str, value: i64) -> bool

Sets the value of the specified field of the meta container to the given int64 value. Read more
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fn set_marker_list(&self, meta_item: &str, list: &MarkerList) -> bool

Sets the value of the specified field of the meta container to the given marker list value. Read more
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fn set_meta(&self, meta_item: &str, value: Option<&Value>) -> bool

Sets the value of the specified field of the meta container to a copy of the given value. If the given value is None, the field given by meta_item is removed and true is returned. Read more
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fn set_string(&self, meta_item: &str, value: &str) -> bool

Sets the value of the specified field of the meta container to the given string value. Read more
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fn set_uint(&self, meta_item: &str, value: u32) -> bool

Sets the value of the specified field of the meta container to the given uint value. Read more
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fn set_uint64(&self, meta_item: &str, value: u64) -> bool

Sets the value of the specified field of the meta container to the given uint64 value. Read more
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fn connect_notify_meta<F: Fn(&Self, &str, Option<&Value>) + 'static>( &self, detail: Option<&str>, f: F ) -> SignalHandlerId

This is emitted for a meta container whenever the metadata under one of its fields changes, is set for the first time, or is removed. In the latter case, value will be None. Read more
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impl<T> ObjectExt for T
where T: ObjectType,

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fn is<U>(&self) -> bool
where U: StaticType,

Returns true if the object is an instance of (can be cast to) T.
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fn type_(&self) -> Type

Returns the type of the object.
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fn object_class(&self) -> &Class<Object>

Returns the ObjectClass of the object. Read more
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fn class(&self) -> &Class<T>
where T: IsClass,

Returns the class of the object.
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fn class_of<U>(&self) -> Option<&Class<U>>
where U: IsClass,

Returns the class of the object in the given type T. Read more
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fn interface<U>(&self) -> Option<InterfaceRef<'_, U>>
where U: IsInterface,

Returns the interface T of the object. Read more
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fn set_property(&self, property_name: &str, value: impl Into<Value>)

Sets the property property_name of the object to value value. Read more
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fn set_property_from_value(&self, property_name: &str, value: &Value)

Sets the property property_name of the object to value value. Read more
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fn set_properties(&self, property_values: &[(&str, &dyn ToValue)])

Sets multiple properties of the object at once. Read more
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fn set_properties_from_value(&self, property_values: &[(&str, Value)])

Sets multiple properties of the object at once. Read more
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fn property<V>(&self, property_name: &str) -> V
where V: for<'b> FromValue<'b> + 'static,

Gets the property property_name of the object and cast it to the type V. Read more
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fn property_value(&self, property_name: &str) -> Value

Gets the property property_name of the object. Read more
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fn has_property(&self, property_name: &str, type_: Option<Type>) -> bool

Check if the object has a property property_name of the given type_. Read more
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fn property_type(&self, property_name: &str) -> Option<Type>

Get the type of the property property_name of this object. Read more
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fn find_property(&self, property_name: &str) -> Option<ParamSpec>

Get the ParamSpec of the property property_name of this object.
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fn list_properties(&self) -> PtrSlice<ParamSpec>

Return all ParamSpec of the properties of this object.
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fn freeze_notify(&self) -> PropertyNotificationFreezeGuard

Freeze all property notifications until the return guard object is dropped. Read more
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unsafe fn set_qdata<QD>(&self, key: Quark, value: QD)
where QD: 'static,

Set arbitrary data on this object with the given key. Read more
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unsafe fn qdata<QD>(&self, key: Quark) -> Option<NonNull<QD>>
where QD: 'static,

Return previously set arbitrary data of this object with the given key. Read more
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unsafe fn steal_qdata<QD>(&self, key: Quark) -> Option<QD>
where QD: 'static,

Retrieve previously set arbitrary data of this object with the given key. Read more
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unsafe fn set_data<QD>(&self, key: &str, value: QD)
where QD: 'static,

Set arbitrary data on this object with the given key. Read more
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unsafe fn data<QD>(&self, key: &str) -> Option<NonNull<QD>>
where QD: 'static,

Return previously set arbitrary data of this object with the given key. Read more
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unsafe fn steal_data<QD>(&self, key: &str) -> Option<QD>
where QD: 'static,

Retrieve previously set arbitrary data of this object with the given key. Read more
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fn block_signal(&self, handler_id: &SignalHandlerId)

Block a given signal handler. Read more
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fn unblock_signal(&self, handler_id: &SignalHandlerId)

Unblock a given signal handler.
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fn stop_signal_emission(&self, signal_id: SignalId, detail: Option<Quark>)

Stop emission of the currently emitted signal.
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fn stop_signal_emission_by_name(&self, signal_name: &str)

Stop emission of the currently emitted signal by the (possibly detailed) signal name.
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fn connect<F>( &self, signal_name: &str, after: bool, callback: F ) -> SignalHandlerId
where F: Fn(&[Value]) -> Option<Value> + Send + Sync + 'static,

Connect to the signal signal_name on this object. Read more
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fn connect_id<F>( &self, signal_id: SignalId, details: Option<Quark>, after: bool, callback: F ) -> SignalHandlerId
where F: Fn(&[Value]) -> Option<Value> + Send + Sync + 'static,

Connect to the signal signal_id on this object. Read more
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fn connect_local<F>( &self, signal_name: &str, after: bool, callback: F ) -> SignalHandlerId
where F: Fn(&[Value]) -> Option<Value> + 'static,

Connect to the signal signal_name on this object. Read more
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fn connect_local_id<F>( &self, signal_id: SignalId, details: Option<Quark>, after: bool, callback: F ) -> SignalHandlerId
where F: Fn(&[Value]) -> Option<Value> + 'static,

Connect to the signal signal_id on this object. Read more
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unsafe fn connect_unsafe<F>( &self, signal_name: &str, after: bool, callback: F ) -> SignalHandlerId
where F: Fn(&[Value]) -> Option<Value>,

Connect to the signal signal_name on this object. Read more
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unsafe fn connect_unsafe_id<F>( &self, signal_id: SignalId, details: Option<Quark>, after: bool, callback: F ) -> SignalHandlerId
where F: Fn(&[Value]) -> Option<Value>,

Connect to the signal signal_id on this object. Read more
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fn connect_closure( &self, signal_name: &str, after: bool, closure: RustClosure ) -> SignalHandlerId

Connect a closure to the signal signal_name on this object. Read more
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fn connect_closure_id( &self, signal_id: SignalId, details: Option<Quark>, after: bool, closure: RustClosure ) -> SignalHandlerId

Connect a closure to the signal signal_id on this object. Read more
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fn watch_closure(&self, closure: &impl AsRef<Closure>)

Limits the lifetime of closure to the lifetime of the object. When the object’s reference count drops to zero, the closure will be invalidated. An invalidated closure will ignore any calls to invoke_with_values, or invoke when using Rust closures.
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fn emit<R>(&self, signal_id: SignalId, args: &[&dyn ToValue]) -> R

Emit signal by signal id. Read more
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fn emit_with_values(&self, signal_id: SignalId, args: &[Value]) -> Option<Value>

Same as Self::emit but takes Value for the arguments.
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fn emit_by_name<R>(&self, signal_name: &str, args: &[&dyn ToValue]) -> R

Emit signal by its name. Read more
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fn emit_by_name_with_values( &self, signal_name: &str, args: &[Value] ) -> Option<Value>

Emit signal by its name. Read more
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fn emit_by_name_with_details<R>( &self, signal_name: &str, details: Quark, args: &[&dyn ToValue] ) -> R

Emit signal by its name with details. Read more
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fn emit_by_name_with_details_and_values( &self, signal_name: &str, details: Quark, args: &[Value] ) -> Option<Value>

Emit signal by its name with details. Read more
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fn emit_with_details<R>( &self, signal_id: SignalId, details: Quark, args: &[&dyn ToValue] ) -> R

Emit signal by signal id with details. Read more
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fn emit_with_details_and_values( &self, signal_id: SignalId, details: Quark, args: &[Value] ) -> Option<Value>

Emit signal by signal id with details. Read more
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fn disconnect(&self, handler_id: SignalHandlerId)

Disconnect a previously connected signal handler.
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fn connect_notify<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId
where F: Fn(&T, &ParamSpec) + Send + Sync + 'static,

Connect to the notify signal of the object. Read more
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fn connect_notify_local<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId
where F: Fn(&T, &ParamSpec) + 'static,

Connect to the notify signal of the object. Read more
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unsafe fn connect_notify_unsafe<F>( &self, name: Option<&str>, f: F ) -> SignalHandlerId
where F: Fn(&T, &ParamSpec),

Connect to the notify signal of the object. Read more
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fn notify(&self, property_name: &str)

Notify that the given property has changed its value. Read more
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fn notify_by_pspec(&self, pspec: &ParamSpec)

Notify that the given property has changed its value. Read more
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fn downgrade(&self) -> WeakRef<T>

Downgrade this object to a weak reference.
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fn add_weak_ref_notify<F>(&self, f: F) -> WeakRefNotify<T>
where F: FnOnce() + Send + 'static,

Add a callback to be notified when the Object is disposed.
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fn add_weak_ref_notify_local<F>(&self, f: F) -> WeakRefNotify<T>
where F: FnOnce() + 'static,

Add a callback to be notified when the Object is disposed. Read more
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fn bind_property<'a, 'f, 't, O>( &'a self, source_property: &'a str, target: &'a O, target_property: &'a str ) -> BindingBuilder<'a, 'f, 't>
where O: ObjectType,

Bind property source_property on this object to the target_property on the target object. Read more
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fn ref_count(&self) -> u32

Returns the strong reference count of this object.
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unsafe fn run_dispose(&self)

Runs the dispose mechanism of the object. Read more
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impl<T> Property for T
where T: HasParamSpec,

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type Value = T

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impl<T> PropertyGet for T
where T: HasParamSpec,

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type Value = T

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fn get<R, F>(&self, f: F) -> R
where F: Fn(&<T as PropertyGet>::Value) -> R,

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impl<T> StaticTypeExt for T
where T: StaticType,

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fn ensure_type()

Ensures that the type has been registered with the type system.
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impl<O> TimelineElementExt for O
where O: IsA<TimelineElement>,

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fn add_child_property( &self, pspec: impl AsRef<ParamSpec>, child: &impl IsA<Object> ) -> Result<(), BoolError>

Register a property of a child of the element to allow it to be written with set_child_property() and read with child_property(). A change in the property will also appear in the deep-notify signal. Read more
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fn copy(&self, deep: bool) -> TimelineElement

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fn edit( &self, layers: &[Layer], new_layer_priority: i64, mode: EditMode, edge: Edge, position: u64 ) -> bool

See edit_full(), which also gives an error. Read more
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fn edit_full( &self, new_layer_priority: i64, mode: EditMode, edge: Edge, position: u64 ) -> Result<(), Error>

Edits the element within its timeline by adjusting its start, duration or in-point, and potentially doing the same for other elements in the timeline. See EditMode for details about each edit mode. An edit may fail if it would place one of these properties out of bounds, or if it would place the timeline in an unsupported configuration. Read more
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fn child_property(&self, property_name: &str) -> Option<Value>

Gets the property of a child of the element. Read more
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fn child_property_by_pspec(&self, pspec: impl AsRef<ParamSpec>) -> Value

Gets the property of a child of the element. Specifically, the property corresponding to the pspec used in add_child_property() is copied into value. Read more
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fn duration(&self) -> ClockTime

Gets the duration for the element. Read more
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fn inpoint(&self) -> ClockTime

Gets the in-point for the element. Read more
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fn layer_priority(&self) -> u32

Gets the priority of the layer the element is in. A Group may span several layers, so this would return the highest priority (numerically, the smallest) amongst them. Read more
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fn max_duration(&self) -> Option<ClockTime>

Gets the max-duration for the element. Read more
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fn name(&self) -> Option<GString>

Gets the name for the element. Read more
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fn natural_framerate(&self) -> Option<(i32, i32)>

Get the “natural” framerate of self. This is to say, for example for a VideoUriSource the framerate of the source. Read more
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fn parent(&self) -> Option<TimelineElement>

Gets the parent for the element. Read more
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fn priority(&self) -> u32

Gets the priority for the element. Read more
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fn start(&self) -> ClockTime

Gets the start for the element. Read more
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fn timeline(&self) -> Option<Timeline>

Gets the timeline for the element. Read more
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fn toplevel_parent(&self) -> TimelineElement

Gets the toplevel parent of the element. Read more
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fn track_types(&self) -> TrackType

Gets the track types that the element can interact with, i.e. the type of Track it can exist in, or will create TrackElement-s for. Read more
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fn list_children_properties(&self) -> Vec<ParamSpec>

Get a list of children properties of the element, which is a list of all the specifications passed to add_child_property(). Read more
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fn lookup_child(&self, prop_name: &str) -> Option<(Object, ParamSpec)>

Looks up a child property of the element. Read more
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fn paste(&self, paste_position: ClockTime) -> Result<TimelineElement, BoolError>

Paste an element inside the same timeline and layer as self. self must be the return of ges_timeline_element_copy() with deep=TRUE, and it should not be changed before pasting. self is not placed in the timeline, instead a new element is created, alike to the originally copied element. Note that the originally copied element must stay within the same timeline and layer, at both the point of copying and pasting. Read more
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fn remove_child_property( &self, pspec: impl AsRef<ParamSpec> ) -> Result<(), BoolError>

Remove a child property from the element. pspec should be a specification that was passed to add_child_property(). The corresponding property will no longer be registered as a child property for the element. Read more
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fn ripple(&self, start: ClockTime) -> Result<(), BoolError>

Edits the start time of an element within its timeline in ripple mode. See edit() with EditMode::Ripple and Edge::None. Read more
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fn ripple_end(&self, end: ClockTime) -> Result<(), BoolError>

Edits the end time of an element within its timeline in ripple mode. See edit() with EditMode::Ripple and Edge::End. Read more
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fn roll_end(&self, end: ClockTime) -> Result<(), BoolError>

Edits the end time of an element within its timeline in roll mode. See edit() with EditMode::Roll and Edge::End. Read more
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fn roll_start(&self, start: ClockTime) -> Result<(), BoolError>

Edits the start time of an element within its timeline in roll mode. See edit() with EditMode::Roll and Edge::Start. Read more
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fn set_child_property( &self, property_name: &str, value: &Value ) -> Result<(), BoolError>

See set_child_property_full(), which also gives an error. Read more
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fn set_child_property_by_pspec( &self, pspec: impl AsRef<ParamSpec>, value: &Value )

Sets the property of a child of the element. Specifically, the property corresponding to the pspec used in add_child_property() is set to value. Read more
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fn set_child_property_full( &self, property_name: &str, value: &Value ) -> Result<(), Error>

Sets the property of a child of the element. Read more
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fn set_duration(&self, duration: impl Into<Option<ClockTime>>) -> bool

Sets duration for the element. Read more
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fn set_inpoint(&self, inpoint: ClockTime) -> bool

Sets in-point for the element. If the new in-point is above the current max-duration of the element, this method will fail. Read more
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fn set_max_duration(&self, maxduration: impl Into<Option<ClockTime>>) -> bool

Sets max-duration for the element. If the new maximum duration is below the current in-point of the element, this method will fail. Read more
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fn set_name(&self, name: Option<&str>) -> Result<(), BoolError>

Sets the name for the element. If None is given for name, then the library will instead generate a new name based on the type name of the element, such as the name “uriclip3” for a UriClip, and will set that name instead. Read more
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fn set_parent( &self, parent: &impl IsA<TimelineElement> ) -> Result<(), BoolError>

Sets the parent for the element. Read more
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fn set_priority(&self, priority: u32) -> bool

👎Deprecated: Since 1.10
Sets the priority of the element within the containing layer. Read more
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fn set_start(&self, start: ClockTime) -> bool

Sets start for the element. If the element has a parent, this will also move its siblings with the same shift. Read more
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fn set_timeline(&self, timeline: &impl IsA<Timeline>) -> Result<(), BoolError>

Sets the timeline of the element. Read more
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fn trim(&self, start: ClockTime) -> Result<(), BoolError>

Edits the start time of an element within its timeline in trim mode. See edit() with EditMode::Trim and Edge::Start. Read more
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fn in_point(&self) -> u64

The initial offset to use internally when outputting content (in nanoseconds, but in the time coordinates of the internal content). Read more
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fn set_in_point(&self, in_point: u64)

The initial offset to use internally when outputting content (in nanoseconds, but in the time coordinates of the internal content). Read more
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fn is_serialize(&self) -> bool

Whether the element should be serialized.
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fn set_serialize(&self, serialize: bool)

Whether the element should be serialized.
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fn connect_child_property_added<F: Fn(&Self, &Object, &ParamSpec) + 'static>( &self, f: F ) -> SignalHandlerId

Emitted when the element has a new child property registered. See add_child_property(). Read more
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fn connect_child_property_removed<F: Fn(&Self, &Object, &ParamSpec) + 'static>( &self, f: F ) -> SignalHandlerId

Emitted when the element has a child property unregistered. See remove_child_property(). Read more
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fn connect_deep_notify<F: Fn(&Self, &Object, &ParamSpec) + 'static>( &self, detail: Option<&str>, f: F ) -> SignalHandlerId

Emitted when a child of the element has one of its registered properties set. See add_child_property(). Note that unlike notify, a child property name can not be used as a signal detail. Read more
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fn connect_duration_notify<F: Fn(&Self) + 'static>( &self, f: F ) -> SignalHandlerId

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fn connect_in_point_notify<F: Fn(&Self) + 'static>( &self, f: F ) -> SignalHandlerId

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fn connect_max_duration_notify<F: Fn(&Self) + 'static>( &self, f: F ) -> SignalHandlerId

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fn connect_name_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId

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fn connect_parent_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId

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fn connect_priority_notify<F: Fn(&Self) + 'static>( &self, f: F ) -> SignalHandlerId

👎Deprecated: Since 1.10
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fn connect_serialize_notify<F: Fn(&Self) + 'static>( &self, f: F ) -> SignalHandlerId

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fn connect_start_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId

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fn connect_timeline_notify<F: Fn(&Self) + 'static>( &self, f: F ) -> SignalHandlerId

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<O> TrackElementExt for O
where O: IsA<TrackElement>,

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fn add_children_props( &self, element: &impl IsA<Element>, wanted_categories: &[&str], blacklist: &[&str], whitelist: &[&str] )

Adds all the properties of a gst::Element that match the criteria as children properties of the track element. If the name of element’s gst::ElementFactory is not in blacklist, and the factory’s GST_ELEMENT_METADATA_KLASS contains at least one member of wanted_categories (e.g. GST_ELEMENT_FACTORY_KLASS_DECODER), then all the properties of element that are also in whitelist are added as child properties of self using TimelineElementExt::add_child_property(). Read more
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fn clamp_control_source(&self, property_name: &str)

Clamp the GstTimedValueControlSource for the specified child property to lie between the in-point and out-point of the element. The out-point is the GES_TIMELINE_ELEMENT_END of the element translated from the timeline coordinates to the internal source coordinates of the element. Read more
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fn edit( &self, layers: &[Layer], mode: EditMode, edge: Edge, position: u64 ) -> Result<(), BoolError>

👎Deprecated: Since 1.18
Edits the element within its track. Read more
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fn is_auto_clamp_control_sources(&self) -> bool

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fn child_property(&self, property_name: &str) -> Option<Value>

In general, a copy is made of the property contents and the caller is responsible for freeing the memory by calling [glib::Value::unset()][crate::glib::Value::unset()]. Read more
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fn child_property_by_pspec(&self, pspec: impl AsRef<ParamSpec>) -> Value

Gets a property of a child of self. Read more
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fn control_binding(&self, property_name: &str) -> Option<ControlBinding>

Gets the control binding that was created for the specified child property of the track element using set_control_source(). The given property_name must be the same name of the child property that was passed to set_control_source(). Read more
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fn element(&self) -> Option<Element>

Get the gst::Element that the track element’s underlying nleobject controls. Read more
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fn gnlobject(&self) -> Element

Get the GNonLin object this object is controlling. Read more
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fn nleobject(&self) -> Element

Get the nleobject that this element wraps. Read more
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fn track(&self) -> Option<Track>

Get the track for the element. Read more
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fn track_type(&self) -> TrackType

Gets the track-type for the element. Read more
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fn has_internal_source(&self) -> bool

Gets has-internal-source for the element. Read more
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fn is_active(&self) -> bool

Gets active for the element. Read more
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fn is_core(&self) -> bool

Get whether the given track element is a core track element. That is, it was created by the create_track_elements GESClipClass method for some Clip. Read more
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fn list_children_properties(&self) -> Vec<ParamSpec>

Gets an array of glib::ParamSpec* for all configurable properties of the children of self. Read more
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fn lookup_child(&self, prop_name: &str) -> Option<(Element, ParamSpec)>

Looks up which element and pspec would be effected by the given name. If various contained elements have this property name you will get the first one, unless you specify the class name in name. Read more
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fn remove_control_binding(&self, property_name: &str) -> Result<(), BoolError>

Removes the gst::ControlBinding that was created for the specified child property of the track element using set_control_source(). The given property_name must be the same name of the child property that was passed to set_control_source(). Read more
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fn set_active(&self, active: bool) -> bool

Sets active for the element. Read more
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fn set_auto_clamp_control_sources(&self, auto_clamp: bool)

Sets auto-clamp-control-sources. If set to true, this will immediately clamp all the control sources. Read more
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fn set_child_property( &self, property_name: &str, value: &Value ) -> Result<(), BoolError>

Sets a property of a GstElement contained in self. Read more
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fn set_child_property_by_pspec( &self, pspec: impl AsRef<ParamSpec>, value: &Value )

Sets a property of a child of self. Read more
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fn set_control_source( &self, source: &impl IsA<ControlSource>, property_name: &str, binding_type: &str ) -> bool

Creates a gst::ControlBinding for the specified child property of the track element using the given control source. The given property_name should refer to an existing child property of the track element, as used in TimelineElementExt::lookup_child(). Read more
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fn set_has_internal_source(&self, has_internal_source: bool) -> bool

Sets has-internal-source for the element. If this is set to false, this method will also set the in-point of the element to 0 and its max-duration to GST_CLOCK_TIME_NONE. Read more
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fn set_track_type(&self, type_: TrackType)

Sets the track-type for the element. Read more
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fn connect_control_binding_added<F: Fn(&Self, &ControlBinding) + 'static>( &self, f: F ) -> SignalHandlerId

This is emitted when a control binding is added to a child property of the track element. Read more
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fn connect_control_binding_removed<F: Fn(&Self, &ControlBinding) + 'static>( &self, f: F ) -> SignalHandlerId

This is emitted when a control binding is removed from a child property of the track element. Read more
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fn connect_active_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId

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fn connect_auto_clamp_control_sources_notify<F: Fn(&Self) + 'static>( &self, f: F ) -> SignalHandlerId

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fn connect_has_internal_source_notify<F: Fn(&Self) + 'static>( &self, f: F ) -> SignalHandlerId

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fn connect_track_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId

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fn connect_track_type_notify<F: Fn(&Self) + 'static>( &self, f: F ) -> SignalHandlerId

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impl<T> TransparentType for T

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T> TryFromClosureReturnValue for T
where T: for<'a> FromValue<'a> + StaticType + 'static,

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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<'a, T, C, E> FromValueOptional<'a> for T
where T: FromValue<'a, Checker = C>, C: ValueTypeChecker<Error = ValueTypeMismatchOrNoneError<E>>, E: Error + Send + 'static,

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impl<Super, Sub> MayDowncastTo<Sub> for Super
where Super: IsA<Super>, Sub: IsA<Super>,