Struct gstreamer_editing_services::Track
source · #[repr(transparent)]pub struct Track { /* private fields */ }
Expand description
A Track
acts an output source for a Timeline
. Each one
essentially provides an additional gst::Pad
for the timeline, with
restriction-caps
capabilities. Internally, a track
wraps an nlecomposition
filtered by a capsfilter
.
A track will contain a number of TrackElement
-s, and its role is
to select and activate these elements according to their timings when
the timeline in played. For example, a track would activate a
Source
when its start
is reached by outputting
its data for its duration
. Similarly, a
Operation
would be activated by applying its effect to the source
data, starting from its start
time and lasting for
its duration
.
For most users, it will usually be sufficient to add newly created
tracks to a timeline, but never directly add an element to a track.
Whenever a Clip
is added to a timeline, the clip adds its
elements to the timeline’s tracks and assumes responsibility for
updating them.
Properties
caps
The capabilities used to choose the output of the Track
’s
elements. Internally, this is used to select output streams when
several may be available, by determining whether its gst::Pad
is
compatible (see NleObject:caps
for nlecomposition
). As such,
this is used as a weaker indication of the desired output type of the
track, before the restriction-caps
is applied.
Therefore, this should be set to a generic superset of the
restriction-caps
, such as “video/x-raw(ANY)”. In addition,
it should match with the track’s track-type
.
Note that when you set this property, the GstCapsFeatures
of all its
gst::Structure
-s will be automatically set to GST_CAPS_FEATURES_ANY
.
Once a track has been added to a Timeline
, you should not change
this.
Default value: GST_CAPS_ANY
.
Readable | Writeable | Construct Only
duration
Current duration of the track
Default value: O
Readable
id
The nlecomposition:id
of the underlying nlecomposition
.
Readable | Writeable
mixing
Whether the track should support the mixing of Layer
data, such
as composing the video data of each layer (when part of the video
data is transparent, the next layer will become visible) or adding
together the audio data. As such, for audio and video tracks, you’ll
likely want to keep this set to true
.
Readable | Writeable | Construct
restriction-caps
The capabilities that specifies the final output format of the
Track
. For example, for a video track, it would specify the
height, width, framerate and other properties of the stream.
You may change this property after the track has been added to a
Timeline
, but it must remain compatible with the track’s
caps
.
Default value: GST_CAPS_ANY
.
Readable | Writeable
track-type
The track type of the track. This controls the type of
TrackElement
-s that can be added to the track. This should
match with the track’s caps
.
Once a track has been added to a Timeline
, you should not change
this.
Readable | Writeable | Construct Only
Bin
async-handling
If set to true
, the bin will handle asynchronous state changes.
This should be used only if the bin subclass is modifying the state
of its children on its own.
Readable | Writeable
message-forward
Forward all children messages, even those that would normally be filtered by the bin. This can be interesting when one wants to be notified of the EOS state of individual elements, for example.
The messages are converted to an ELEMENT message with the bin as the
source. The structure of the message is named GstBinForwarded
and contains
a field named message
that contains the original forwarded GstMessage
.
Readable | Writeable
Object
name
Readable | Writeable | Construct
parent
The parent of the object. Please note, that when changing the ‘parent’
property, we don’t emit notify
and deep-notify
signals due to locking issues. In some cases one can use
element-added
or element-removed
signals on the parent to
achieve a similar effect.
Readable | Writeable
Signals
commited
This signal will be emitted once the changes initiated by
GESTrackExt::commit()
have been executed in the backend. In particular,
this will be emitted whenever the underlying nlecomposition
has been
committed (see nlecomposition::commited
).
track-element-added
Will be emitted after a track element is added to the track.
track-element-removed
Will be emitted after a track element is removed from the track.
Bin
deep-element-added
Will be emitted after the element was added to sub_bin
.
deep-element-removed
Will be emitted after the element was removed from sub_bin
.
do-latency
Will be emitted when the bin needs to perform latency calculations. This
signal is only emitted for toplevel bins or when async-handling
is
enabled.
Only one signal handler is invoked. If no signals are connected, the default handler is invoked, which will query and distribute the lowest possible latency to all sinks.
Connect to this signal if the default latency calculations are not sufficient, like when you need different latencies for different sinks in the same pipeline.
element-added
Will be emitted after the element was added to the bin.
element-removed
Will be emitted after the element was removed from the bin.
Element
no-more-pads
This signals that the element will not generate more dynamic pads. Note that this signal will usually be emitted from the context of the streaming thread.
pad-added
a new gst::Pad
has been added to the element. Note that this signal will
usually be emitted from the context of the streaming thread. Also keep in
mind that if you add new elements to the pipeline in the signal handler
you will need to set them to the desired target state with
[ElementExtManual::set_state()
][crate::gst::prelude::ElementExtManual::set_state()] or [ElementExtManual::sync_state_with_parent()
][crate::gst::prelude::ElementExtManual::sync_state_with_parent()].
pad-removed
a gst::Pad
has been removed from the element
Object
deep-notify
The deep notify signal is used to be notified of property changes. It is typically attached to the toplevel bin to receive notifications from all the elements contained in that bin.
Detailed
ChildProxy
child-added
Will be emitted after the object
was added to the child_proxy
.
child-removed
Will be emitted after the object
was removed from the child_proxy
.
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
GESTrackExt
, [trait@gst::prelude::BinExt
], gst::prelude::ElementExt
, gst::prelude::GstObjectExt
, glib::ObjectExt
, gst::prelude::ChildProxyExt
, MetaContainerExt
Implementations§
source§impl Track
impl Track
pub const NONE: Option<&'static Track> = None
sourcepub fn new(type_: TrackType, caps: Caps) -> Track
pub fn new(type_: TrackType, caps: Caps) -> Track
Creates a new track with the given track-type and caps.
If type_
is TrackType::VIDEO
, and caps
is a subset of
“video/x-raw(ANY)”, then a VideoTrack
is created. This will
automatically choose a gap creation method suitable for video data. You
will likely want to set restriction-caps
separately. You may
prefer to use the VideoTrack::new()
method instead.
If type_
is TrackType::AUDIO
, and caps
is a subset of
“audio/x-raw(ANY)”, then a AudioTrack
is created. This will
automatically choose a gap creation method suitable for audio data, and
will set the restriction-caps
to the default for
AudioTrack
. You may prefer to use the AudioTrack::new()
method
instead.
Otherwise, a plain Track
is returned. You will likely want to set
the restriction-caps
and call
ges_track_set_create_element_for_gap_func()
on the returned track.
type_
The track-type
for the track
caps
The caps
for the track
Returns
A new track.
Trait Implementations§
source§impl HasParamSpec for Track
impl HasParamSpec for Track
source§impl Ord for Track
impl Ord for Track
source§impl<OT: ObjectType> PartialEq<OT> for Track
impl<OT: ObjectType> PartialEq<OT> for Track
source§impl<OT: ObjectType> PartialOrd<OT> for Track
impl<OT: ObjectType> PartialOrd<OT> for Track
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
self
and other
) and is used by the <=
operator. Read moresource§impl StaticType for Track
impl StaticType for Track
source§fn static_type() -> Type
fn static_type() -> Type
Self
.impl Eq for Track
impl IsA<Bin> for Track
impl IsA<ChildProxy> for Track
impl IsA<Element> for Track
impl IsA<MetaContainer> for Track
impl IsA<Object> for Track
impl IsA<Track> for AudioTrack
impl IsA<Track> for VideoTrack
Auto Trait Implementations§
impl RefUnwindSafe for Track
impl !Send for Track
impl !Sync for Track
impl Unpin for Track
impl UnwindSafe for Track
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&self,
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) -> Option<Pad>
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&self,
srcpadname: &str,
dest: &impl IsA<Element>,
destpadname: &str
)
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&self,
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&self,
dest: &impl IsA<Element>,
filter: &Caps
) -> Result<(), BoolError>
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&self,
srcpadname: Option<&str>,
dest: &impl IsA<Element>,
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) -> Result<(), BoolError>
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&self,
srcpadname: Option<&str>,
dest: &impl IsA<Element>,
destpadname: Option<&str>,
filter: &Caps
) -> Result<(), BoolError>
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&self,
srcpadname: Option<&str>,
dest: &impl IsA<Element>,
destpadname: Option<&str>,
flags: PadLinkCheck
) -> Result<(), BoolError>
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F: Fn(&O) -> Result<(), LoggableError> + Send + Sync + 'static,
source§fn iterate_all_by_element_factory_name(
&self,
factory_name: &str
) -> Iterator<Element>
fn iterate_all_by_element_factory_name(
&self,
factory_name: &str
) -> Iterator<Element>
v1_18
only.fn iterate_all_by_interface(&self, iface: Type) -> Iterator<Element>
fn iterate_elements(&self) -> Iterator<Element>
fn iterate_recurse(&self) -> Iterator<Element>
fn iterate_sinks(&self) -> Iterator<Element>
fn iterate_sorted(&self) -> Iterator<Element>
fn iterate_sources(&self) -> Iterator<Element>
fn children(&self) -> Vec<Element, Global> ⓘ
fn debug_to_dot_data(&self, details: DebugGraphDetails) -> GString
fn debug_to_dot_file(
&self,
details: DebugGraphDetails,
file_name: impl AsRef<Path>
)
fn debug_to_dot_file_with_ts(
&self,
details: DebugGraphDetails,
file_name: impl AsRef<Path>
)
fn set_bin_flags(&self, flags: BinFlags)
fn unset_bin_flags(&self, flags: BinFlags)
fn bin_flags(&self) -> BinFlags
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O: IsA<Object>,
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source§fn add_control_binding(
&self,
binding: &impl IsA<ControlBinding>
) -> Result<(), BoolError>
fn add_control_binding(
&self,
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) -> Result<(), BoolError>
ControlBinding
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and the optional debug string.. Read moresource§fn control_binding(&self, property_name: &str) -> Option<ControlBinding>
fn control_binding(&self, property_name: &str) -> Option<ControlBinding>
ControlBinding
for the property. This should be
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fn control_rate(&self) -> Option<ClockTime>
self
. Audio processing Element
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in between. The length of the processing segment
should be up to control
-rate nanoseconds. Read moresource§fn parent(&self) -> Option<Object>
fn parent(&self) -> Option<Object>
self
. This function increases the refcount
of the parent object so you should gst_object_unref()
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fn path_string(&self) -> GString
self
in
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&self,
property_name: &str,
timestamp: impl Into<Option<ClockTime>>
) -> Option<Value>
fn value(
&self,
property_name: &str,
timestamp: impl Into<Option<ClockTime>>
) -> Option<Value>
fn has_active_control_bindings(&self) -> bool
fn has_ancestor(&self, ancestor: &impl IsA<Object>) -> bool
fn has_as_ancestor(&self, ancestor: &impl IsA<Object>) -> bool
fn has_as_parent(&self, parent: &impl IsA<Object>) -> bool
fn remove_control_binding(&self, binding: &impl IsA<ControlBinding>) -> bool
fn set_control_binding_disabled(&self, property_name: &str, disabled: bool)
fn set_control_bindings_disabled(&self, disabled: bool)
fn set_control_rate(&self, control_rate: impl Into<Option<ClockTime>>)
fn set_parent(&self, parent: &impl IsA<Object>) -> Result<(), BoolError>
fn suggest_next_sync(&self) -> Option<ClockTime>
fn sync_values(&self, timestamp: ClockTime) -> Result<(), BoolError>
fn unparent(&self)
fn connect_parent_notify<F>(&self, f: F) -> SignalHandlerIdwhere
F: Fn(&O) + Send + Sync + 'static,
source§impl<O> GstObjectExtManual for Owhere
O: IsA<Object>,
impl<O> GstObjectExtManual for Owhere
O: IsA<Object>,
fn connect_deep_notify<F>(&self, name: Option<&str>, f: F) -> SignalHandlerIdwhere
F: Fn(&O, &Object, &ParamSpec) + Send + Sync + 'static,
fn set_object_flags(&self, flags: ObjectFlags)
fn unset_object_flags(&self, flags: ObjectFlags)
fn object_flags(&self) -> ObjectFlags
fn g_value_array(
&self,
property_name: &str,
timestamp: ClockTime,
interval: ClockTime,
values: &mut [Value]
) -> Result<(), BoolError>
fn object_lock(&self) -> ObjectLockGuard<'_, O>
source§impl<T> IntoClosureReturnValue for Twhere
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impl<U> IsSubclassableExt for Uwhere
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T: ObjectSubclass,
<U as ParentClassIs>::Parent: IsSubclassable<T>,
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fn freeze_notify(&self) -> PropertyNotificationFreezeGuard
source§unsafe fn set_qdata<QD>(&self, key: Quark, value: QD)where
QD: 'static,
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QD: 'static,
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. Read moresource§unsafe fn qdata<QD>(&self, key: Quark) -> Option<NonNull<QD>>where
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key
. Read moresource§unsafe fn steal_qdata<QD>(&self, key: Quark) -> Option<QD>where
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QD: 'static,
key
. Read moresource§unsafe fn set_data<QD>(&self, key: &str, value: QD)where
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key
. Read moresource§unsafe fn data<QD>(&self, key: &str) -> Option<NonNull<QD>>where
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key
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key
. Read moresource§fn block_signal(&self, handler_id: &SignalHandlerId)
fn block_signal(&self, handler_id: &SignalHandlerId)
source§fn unblock_signal(&self, handler_id: &SignalHandlerId)
fn unblock_signal(&self, handler_id: &SignalHandlerId)
source§fn stop_signal_emission(&self, signal_id: SignalId, detail: Option<Quark>)
fn stop_signal_emission(&self, signal_id: SignalId, detail: Option<Quark>)
source§fn stop_signal_emission_by_name(&self, signal_name: &str)
fn stop_signal_emission_by_name(&self, signal_name: &str)
source§fn connect<F>(
&self,
signal_name: &str,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: Fn(&[Value]) -> Option<Value> + Send + Sync + 'static,
fn connect<F>(
&self,
signal_name: &str,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: Fn(&[Value]) -> Option<Value> + Send + Sync + 'static,
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on this object. Read moresource§fn connect_id<F>(
&self,
signal_id: SignalId,
details: Option<Quark>,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: Fn(&[Value]) -> Option<Value> + Send + Sync + 'static,
fn connect_id<F>(
&self,
signal_id: SignalId,
details: Option<Quark>,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: Fn(&[Value]) -> Option<Value> + Send + Sync + 'static,
signal_id
on this object. Read moresource§fn connect_local<F>(
&self,
signal_name: &str,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: Fn(&[Value]) -> Option<Value> + 'static,
fn connect_local<F>(
&self,
signal_name: &str,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: Fn(&[Value]) -> Option<Value> + 'static,
signal_name
on this object. Read moresource§fn connect_local_id<F>(
&self,
signal_id: SignalId,
details: Option<Quark>,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: Fn(&[Value]) -> Option<Value> + 'static,
fn connect_local_id<F>(
&self,
signal_id: SignalId,
details: Option<Quark>,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: Fn(&[Value]) -> Option<Value> + 'static,
signal_id
on this object. Read moresource§unsafe fn connect_unsafe<F>(
&self,
signal_name: &str,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: Fn(&[Value]) -> Option<Value>,
unsafe fn connect_unsafe<F>(
&self,
signal_name: &str,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: Fn(&[Value]) -> Option<Value>,
signal_name
on this object. Read moresource§unsafe fn connect_unsafe_id<F>(
&self,
signal_id: SignalId,
details: Option<Quark>,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: Fn(&[Value]) -> Option<Value>,
unsafe fn connect_unsafe_id<F>(
&self,
signal_id: SignalId,
details: Option<Quark>,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: Fn(&[Value]) -> Option<Value>,
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on this object. Read moresource§fn connect_closure(
&self,
signal_name: &str,
after: bool,
closure: RustClosure
) -> SignalHandlerId
fn connect_closure(
&self,
signal_name: &str,
after: bool,
closure: RustClosure
) -> SignalHandlerId
signal_name
on this object. Read moresource§fn connect_closure_id(
&self,
signal_id: SignalId,
details: Option<Quark>,
after: bool,
closure: RustClosure
) -> SignalHandlerId
fn connect_closure_id(
&self,
signal_id: SignalId,
details: Option<Quark>,
after: bool,
closure: RustClosure
) -> SignalHandlerId
signal_id
on this object. Read moresource§fn watch_closure(&self, closure: &impl AsRef<Closure>)
fn watch_closure(&self, closure: &impl AsRef<Closure>)
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
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, or
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when using Rust closures.source§fn emit<R>(&self, signal_id: SignalId, args: &[&dyn ToValue]) -> Rwhere
R: TryFromClosureReturnValue,
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Self::emit
but takes Value
for the arguments.source§fn emit_by_name<R>(&self, signal_name: &str, args: &[&dyn ToValue]) -> Rwhere
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R: TryFromClosureReturnValue,
source§fn emit_by_name_with_values(
&self,
signal_name: &str,
args: &[Value]
) -> Option<Value>
fn emit_by_name_with_values(
&self,
signal_name: &str,
args: &[Value]
) -> Option<Value>
source§fn emit_by_name_with_details<R>(
&self,
signal_name: &str,
details: Quark,
args: &[&dyn ToValue]
) -> Rwhere
R: TryFromClosureReturnValue,
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&self,
signal_name: &str,
details: Quark,
args: &[&dyn ToValue]
) -> Rwhere
R: TryFromClosureReturnValue,
source§fn emit_by_name_with_details_and_values(
&self,
signal_name: &str,
details: Quark,
args: &[Value]
) -> Option<Value>
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&self,
signal_name: &str,
details: Quark,
args: &[Value]
) -> Option<Value>
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&self,
signal_id: SignalId,
details: Quark,
args: &[&dyn ToValue]
) -> Rwhere
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&self,
signal_id: SignalId,
details: Quark,
args: &[&dyn ToValue]
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&self,
signal_id: SignalId,
details: Quark,
args: &[Value]
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&self,
signal_id: SignalId,
details: Quark,
args: &[Value]
) -> Option<Value>
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source§fn connect_notify<F>(&self, name: Option<&str>, f: F) -> SignalHandlerIdwhere
F: Fn(&T, &ParamSpec) + Send + Sync + 'static,
fn connect_notify<F>(&self, name: Option<&str>, f: F) -> SignalHandlerIdwhere
F: Fn(&T, &ParamSpec) + Send + Sync + 'static,
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F: Fn(&T, &ParamSpec) + 'static,
fn connect_notify_local<F>(&self, name: Option<&str>, f: F) -> SignalHandlerIdwhere
F: Fn(&T, &ParamSpec) + 'static,
notify
signal of the object. Read moresource§unsafe fn connect_notify_unsafe<F>(
&self,
name: Option<&str>,
f: F
) -> SignalHandlerIdwhere
F: Fn(&T, &ParamSpec),
unsafe fn connect_notify_unsafe<F>(
&self,
name: Option<&str>,
f: F
) -> SignalHandlerIdwhere
F: Fn(&T, &ParamSpec),
notify
signal of the object. Read more