flash.net.NetStreamPlayTransitions - Adobe® Flex® 4 Language Reference (Flex 4)

Package	flash.net
Class	public class NetStreamPlayTransitions
Inheritance	NetStreamPlayTransitions Object

Language Version:

ActionScript 3.0

Runtime Versions:

Flash Player 10, AIR 1.5, Flash Lite 4

The NetStreamPlayTransitions class specifies the valid strings that you can use with the NetStreamPlayOptions.transition property. These strings control the behavior that is used to transition to a new stream or to play a stream, depending on the transition mode that is used.

See also

NetStreamPlayOptions
NetStream.play2()

Public Properties

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	Property		Defined By
		constructor : Object A reference to the class object or constructor function for a given object instance.	Object
		prototype : Object [static] A reference to the prototype object of a class or function object.	Object

Public Methods

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	Method		Defined By
		hasOwnProperty(name:String):Boolean Indicates whether an object has a specified property defined.	Object
		isPrototypeOf(theClass:Object):Boolean Indicates whether an instance of the Object class is in the prototype chain of the object specified as the parameter.	Object
		propertyIsEnumerable(name:String):Boolean Indicates whether the specified property exists and is enumerable.	Object
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Sets the availability of a dynamic property for loop operations.	Object
		toLocaleString():String Returns the string representation of this object, formatted according to locale-specific conventions.	Object
		toString():String Returns the string representation of the specified object.	Object
		valueOf():Object Returns the primitive value of the specified object.	Object

Public Constants

	Constant		Defined By
		APPEND : String = "append" [static] Adds the stream to a playlist and begins playback with the first stream.	NetStreamPlayTransitions
		APPEND_AND_WAIT : String = "appendAndWait" [static] Builds a playlist without starting to play it from the first stream.	NetStreamPlayTransitions
		RESET : String = "reset" [static] Clears any previous play calls and plays the specified stream immediately.	NetStreamPlayTransitions
		RESUME : String = "resume" [static] Requests data from the new connection starting from the point at which the previous connection ended.	NetStreamPlayTransitions
		STOP : String = "stop" [static] Stops playing the streams in a playlist.	NetStreamPlayTransitions
		SWAP : String = "swap" [static] Replaces a content stream with a different content stream and maintains the rest of the playlist.	NetStreamPlayTransitions
		SWITCH : String = "switch" [static] Switches from playing one stream to another stream, typically with streams of the same content.	NetStreamPlayTransitions

Constant Detail

APPEND

Constant

public static const APPEND:String = "append"

Language Version:

ActionScript 3.0

Runtime Versions:

Flash Player 10, AIR 1.5, Flash Lite 4

Adds the stream to a playlist and begins playback with the first stream. This mode does the same thing as the NetStream.play() method with the reset flag set to false.

In this mode, Flash Media Server queues up the stream specified in NetStreamPlayOptions.streamName at the end of the playlist and ignores the NetStreamPlayOptions.oldStreamName parameter.

APPEND_AND_WAIT

Constant

public static const APPEND_AND_WAIT:String = "appendAndWait"

Language Version:

ActionScript 3.0

Runtime Versions:

Flash Player 10.1, AIR 2, Flash Lite 4

Builds a playlist without starting to play it from the first stream.

The APPEND_AND_WAIT transition mode is used with the NetStream.play2() method to build a playlist without immediately starting to play it from the first stream. Use this mode to load each item in the playlist except the last one. When you load the last stream in the playlist, set the transition mode to RESUME. At this point, Flash Player begins to stream and play the playlist.

You can use this mode to build a playlist from scratch, or to rebuild a playlist after a lost connection is recovered. For a new playlist, when NetStream.play2() is called with RESUME, Flash Player begins streaming and playing from the first stream, or from the start position specified. To recover from a lost connection, when you call the NetStream.play2() method with RESUME, Flash Player determines where the stream was interrupted and instructs the server to start streaming from that location. The server in turn is able to determine which stream in the playlist corresponds to that location, and starts streaming from that location.

This transition mode is in contrast to the APPEND mode, where playback starts immediately with the first stream.

See also

APPEND
RESUME
NetStream.play2()

RESET

Constant

public static const RESET:String = "reset"

Language Version:

ActionScript 3.0

Runtime Versions:

Flash Player 10, AIR 1.5, Flash Lite 4

Clears any previous play calls and plays the specified stream immediately. This mode does the same thing as the NetStream.play() method with the reset flag set to true (the default behavior for NetStream.play()).

In this mode, the currently playing stream is flushed and the stream specified in NetStreamPlayOptions.streamName starts to play. The NetStreamPlayOptions.oldStreamName parameter is ignored.

RESUME

Constant

public static const RESUME:String = "resume"

Language Version:

ActionScript 3.0

Runtime Versions:

Flash Player 10.1, AIR 2, Flash Lite 4

Requests data from the new connection starting from the point at which the previous connection ended. The RESUME mode aligns the stream across the two connections so no artifacts or jumps are observed in the video playback. Use this mode when you reconnect a stream that was dropped due to server issues or other connection problems.

See also

APPEND_AND_WAIT
NetStream.play2()

STOP

Constant

public static const STOP:String = "stop"

Language Version:

ActionScript 3.0

Runtime Versions:

Flash Player 10, AIR 1.5, Flash Lite 4

Stops playing the streams in a playlist. This mode does the same thing as calling NetStream.play(false). It stops and resets the playlist.

See also

NetStream.play()
NetStream.play2()

SWAP

Constant

public static const SWAP:String = "swap"

Language Version:

ActionScript 3.0

Runtime Versions:

Flash Player 10, AIR 1.5, Flash Lite 4

Replaces a content stream with a different content stream and maintains the rest of the playlist.

This mode replaces the stream specified in NetStreamPlayOptions.oldStreamName with the stream specified in NetStreamPlayOptions.streamName. The rest of the playlist is maintained. In this mode, Flash Media Server does not make assumptions about the content of the streams and treats them like different content.

If oldStreamName has not yet been sent, the server performs the switch at the stream boundary and sends the bits for streamName from the beginning. If the server has already started sending the bits for oldStreamName, it doesn't switch to streamName, and a NetStream.Play.Failed event is sent.

Use this mode if the streams you want to switch are not related to each other and have different content or lengths. For example, use this mode when you want to swap one commercial for another based on user tracking and past commercial-viewing statistics.

To switch from one stream to another with the same content, use the SWITCH mode instead.

SWITCH

Constant

public static const SWITCH:String = "switch"

Language Version:

ActionScript 3.0

Runtime Versions:

Flash Player 10, AIR 1.5, Flash Lite 4

Switches from playing one stream to another stream, typically with streams of the same content. Specify the streams to switch in NetStreamPlayOptions.oldStreamName and NetStreamPlayOptions.streamName.

Use this mode when you want to switch to a stream that has the same content but is encoded at a different bit rate or resolution. For example, use this mode when the application queues up streams in a playlist or is playing a single stream at a particular bit rate, then calculates that the bandwidth availability or the CPU capability is either lower or higher than the stream requirements. The application can then update the streams with their higher or lower bit rate versions.

In this mode, Flash Media Server makes certain assumptions about the relationship between the oldStreamName and streamName streams. The server assumes that the streams contain the same content and have the same keyframe interval but have different resolutions or bit rates.

When a playlist has been queued up and oldStreamName is one of the streams in the playlist or is currently playing, oldStreamName is replaced by streamName.

If oldStreamName is null or undefined, or if it is not found in the playlist, the server switches to streamName at the next logical point, to ensure a smooth switch.

To switch from one stream to another with different content, use the SWAP mode instead.