LightweightVideoElement

Pacchetto	org.osmf.elements
Classe	public class LightweightVideoElement
Ereditarietà	LightweightVideoElement LoadableElementBase MediaElement EventDispatcher Object
Sottoclassi	VideoElement

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

OSMF 1.0

Versioni runtime:

Flash Player 10, AIR 1.5

LightweightVideoElement is a media element specifically created for video playback. It supports both streaming and progressive formats.

LightweightVideoElement is a lightweight alternative to VideoElement. Whereas LightweightVideoElement supports only a subset of video delivery modes (specifically progressive and simple RTMP streaming), VideoElement supports all video delivery modes.

The LightweightVideoElement uses a NetLoader class to load and unload its media. Developers requiring custom loading logic for video can pass their own loaders to the LightweightVideoElement constructor. These loaders should subclass NetLoader.

The basic steps for creating and using a LightweightVideoElement are:

Create a new URLResource pointing to the URL of the video stream or file containing the video to be loaded.
Create a new NetLoader.
Create the new LightweightVideoElement, passing the NetLoader and URLResource as parameters.
Create a new MediaPlayer.
Assign the LightweightVideoElement to the MediaPlayer's media property.
Control the media using the MediaPlayer's methods, properties, and events.
When done with the LightweightVideoElement, set the MediaPlayer's media property to null. This will unload the LightweightVideoElement.

The LightweightVideoElement supports Flash Media Token Authentication, for passing authentication tokens through the NetConnection.

The LightweightVideoElement has support for the Flash Player's DRM implementation. Note that the startDate, endDate, and period properties of the DRMTrait on this element correspond to the voucher validity before playback starts. Once playback begins, these properties correspond to the playback time window (as found on flash.net.drm.DRMVoucher).

Vedere gli esempi

Elementi API correlati

org.osmf.elements.VideoElement
org.osmf.media.URLResource
org.osmf.media.MediaElement
org.osmf.media.MediaPlayer
org.osmf.net.NetLoader

Proprietà pubbliche

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	Proprietà		Definito da
		client : NetClient [sola lettura] The NetClient used by this object's NetStream.	LightweightVideoElement
		constructor : Object Un riferimento all'oggetto classe o alla funzione di costruzione per una determinata istanza di oggetto.	Object
		container : IMediaContainer [sola lettura] The media container that this element uses.	MediaElement
		currentFPS : Number [sola lettura] The number of frames per second being displayed.	LightweightVideoElement
		deblocking : int Indicates the type of filter applied to decoded video as part of post-processing.	LightweightVideoElement
		defaultDuration : Number Defines the duration that the element's TimeTrait will expose until the element's content is loaded.	LightweightVideoElement
		metadataNamespaceURLs : Vector.<String> [sola lettura] A Vector containing the namespace URLs for all Metadata objects stored within this MediaElement.	MediaElement
		resource : MediaResourceBase The media resource that this media element operates on.	MediaElement
		smoothing : Boolean Specifies whether the video should be smoothed (interpolated) when it is scaled.	LightweightVideoElement
		traitTypes : Vector.<String> [sola lettura] A Vector of MediaTraitType values representing the trait types on this media element.	MediaElement

Proprietà protette

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	Proprietà		Definito da
		loader : LoaderBase The LoaderBase used by this element to load resources.	LoadableElementBase

Metodi pubblici

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	Metodo		Definito da
		LightweightVideoElement(resource:MediaResourceBase = null, loader:NetLoader = null) Constructor.	LightweightVideoElement
		addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void Registra un oggetto listener di eventi con un oggetto EventDispatcher, in modo che il listener riceva la notifica di un evento.	EventDispatcher
		addMetadata(namespaceURL:String, metadata:Metadata):void Adds a Metadata object to this MediaElement under the specified namespace URL.	MediaElement
		dispatchEvent(event:Event):Boolean Invia un evento nel flusso di eventi.	EventDispatcher
		getMetadata(namespaceURL:String):Metadata Returns the Metadata object that is stored under this MediaElement with the specified namespace URL.	MediaElement
		getTrait(type:String):org.osmf.traits:MediaTraitBase Returns the media trait of the specified type.	MediaElement
		hasEventListener(type:String):Boolean Verifica se per l'oggetto EventDispatcher sono presenti listener registrati per un tipo specifico di evento.	EventDispatcher
		hasOwnProperty(name:String):Boolean Indica se per un oggetto è definita una proprietà specifica.	Object
		hasTrait(type:String):Boolean Determines whether this media element has a media trait of the specified type.	MediaElement
		isPrototypeOf(theClass:Object):Boolean Indica se un'istanza della classe Object si trova nella catena di prototipi dell'oggetto specificato come parametro.	Object
		propertyIsEnumerable(name:String):Boolean Indica se la proprietà specificata esiste ed è enumerabile.	Object
		removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void Rimuove un listener dall'oggetto EventDispatcher.	EventDispatcher
		removeMetadata(namespaceURL:String):Metadata Removes the Metadata object that was stored under this MediaElement with the specified namespace URL.	MediaElement
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Imposta la disponibilità di una proprietà dinamica per le operazioni cicliche.	Object
		toLocaleString():String Restituisce la rappresentazione in formato stringa di questo oggetto, formattato in base alle convenzioni specifiche per le versioni localizzate.	Object
		toString():String Restituisce la rappresentazione in formato stringa dell'oggetto specificato.	Object
		valueOf():Object Restituisce il valore di base dell'oggetto specificato.	Object
		willTrigger(type:String):Boolean Verifica se un listener di eventi è registrato con questo oggetto EventDispatcher o qualsiasi suo antenato per il tipo di evento specificato.	EventDispatcher

Metodi protetti

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	Metodo		Definito da
		addTrait(type:String, instance:org.osmf.traits:MediaTraitBase):void Adds a new media trait to this media element.	MediaElement
		createLoadTrait(resource:MediaResourceBase, loader:LoaderBase):org.osmf.traits:LoadTrait Subclasses can override this method to return a custom LoadTrait subclass.	LoadableElementBase
		processLoadingState():void Subclasses can override this method to do processing when the media element enters the LOADING state.	LoadableElementBase
		processReadyState():void Subclasses can override this method to do processing when the media element enters the READY state.	LoadableElementBase
		processUnloadingState():void Subclasses can override this method to do processing when the media element enters the UNLOADING state.	LoadableElementBase
		removeTrait(type:String):org.osmf.traits:MediaTraitBase Removes a media trait from this media element.	MediaElement
		setupTraits():void Sets up the traits for this media element.	MediaElement

Eventi

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	Riepilogo	Definito da
activate	[evento di trasmissione] Inviato quando Flash Player o l'applicazione AIR ottiene lo stato di attivazione del sistema operativo ed entra nello stato attivo.	EventDispatcher
containerChange	Dispatched when the element's container property changed.	MediaElement
deactivate	[evento di trasmissione] Inviato quando Flash Player o l'applicazione AIR perde l'attivazione del sistema operativo e sta entrando nello stato inattivo.	EventDispatcher
mediaError	Dispatched when an error which impacts the operation of the media element occurs.	MediaElement
mediaInfo	Dispatched when a info which impacts the operation of the media element is available.	MediaElement
metadataAdd	Dispatched when a Metadata object has been added to this media element.	MediaElement
metadataRemove	Dispatched when a Metadata object has been removed from this media element.	MediaElement
traitAdd	Dispatched when a trait is added to the media element.	MediaElement
traitRemove	Dispatched when a trait is removed from the media element.	MediaElement

Descrizione delle proprietà

currentFPS

proprietà

currentFPS:Number [sola lettura]

The number of frames per second being displayed. Will be zero until the video is loaded and playing.

Implementazione
public function get currentFPS():Number

Descrizione della funzione di costruzione

Esempi Come utilizzare questo esempio

LightweightVideoElementExample.as

package asdoc.org.osmf.elements
{
    import flash.display.Sprite;
    import flash.display.StageAlign;
    import flash.display.StageScaleMode;
    
    import org.osmf.elements.LightweightVideoElement;
    import org.osmf.elements.VideoElement;
    import org.osmf.media.MediaPlayer;
    import org.osmf.media.MediaPlayerSprite;
    import org.osmf.media.URLResource;
    
    public class LightweightVideoElementExample extends Sprite
    {
        public function LightweightVideoElementExample()
        {
            super();
            
            stage.scaleMode = StageScaleMode.NO_SCALE;
            stage.align = StageAlign.TOP_LEFT;
            
            var mediaPlayerSprite:MediaPlayerSprite = new MediaPlayerSprite();
            var videoElement:LightweightVideoElement = new LightweightVideoElement();
            videoElement.resource = new URLResource("http://mediapm.edgesuite.net/strobe/content/test/AFaerysTale_sylviaApostol_640_500_short.flv");
            
            addChild(mediaPlayerSprite);
            mediaPlayerSprite.media = videoElement;    
        }
    }
}

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LightweightVideoElement - AS3 OSMF

Pacchettix

Elementi del linguaggio

Appendici

Pacchetto org.osmf.elements

client

currentFPS

deblocking

defaultDuration

smoothing

	`resource:MediaResourceBase` (default = `null`) — URLResource that points to the video source that the LightweightVideoElement will use. For dynamic streaming content, use a DynamicStreamingResource.

	`loader:NetLoader` (default = `null`) — NetLoader used to load the video. If null, then a NetLoader will be used.