MACROMEDIA FLASH MEDIA SERVER 2-CLIENT-SIDE ACTIONSCRIPT LANGUAGE REFERENCE FOR FLASH MEDIA SERVER... Manuale di servizio

Client-Side ActionScript Language

Reference for Flash Media Server 2

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responsible for the content on any linked site. If you access a third-party website mentioned in this guide, then you do so at your

own risk. Macromedia provides these links only as a convenience, and the inclusion of the link does not imply that Macromedia

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translated, or converted to any electronic or machine-readable form in whole or in part without written approval from

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commercial purposes, such as selling copies of this documentation or providing paid-for support services.

Acknowledgments

Project Management: Suzanne Smith

Writing: Jody Bleyle

Managing Editor: Rosana Francescato

Editing: Geta Carlson

Production Management: Patrice O’Neill

Media Design and Production: Adam Barnett, Aaron Begley, Mario Reynoso, Paul Benkman, John Franics

Special thanks to Erick Vera and the Flash Media Server engineering and QA teams.

First Edition: October 2005

Macromedia, Inc.

601 Townsend St.

San Francisco, CA 94103

Contents

Chapter 1: Client-Side ActionScript Language Reference. . . . . . . 5

ActionScript classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

ActionScript elements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Camera class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Microphone class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

MovieClip class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

NetConnection class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

NetStream class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76

SharedObject class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

System class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Video class. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .139

Appendix A: Client-Side Information Objects . . . . . . . . . . . . . . .149

Camera information objects. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

LocalConnection information objects . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

Microphone information objects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

NetConnection information objects . . . . . . . . . . . . . . . . . . . . . . . . . . . . .152

NetStream information objects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .153

SharedObject information objects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .156

4Contents

CHAPTER 1

Client-Side ActionScript

Language Reference

Macromedia Flash Media Server provides two application program interfaces (APIs): a Client-

Side Media ActionScript API and a Server-Side Media ActionScript API. This guide explains

the client-side API.

This document is designed to be used in combination with the ActionScript documentation

included with Macromedia Flash. Refer to the Flash documentation for general scripting

information. Use this document to add Flash Media Server functionality to your Flash

applications.

For additional information about developing applications for Flash Media Server and to

understand how objects created on the client-side are paired with those on the server-Rside,

see Developing Media Applications.

ActionScript classes

The following table lists all the classes in this guide, Client-Side ActionScript Language

Reference for Flash Media Server 2:

NOTE

Most sample code in this document uses ActionScript 2.0 syntax.

ActionScript class Description

Camera class Lets you capture video from a video camera attached to the

computer that is running Macromedia Flash Player.

Microphone class Lets you capture audio from a microphone attached to the

computer that is running Flash Player.

MovieClip class Lets you specify whether an audio source is to be played locally

(Microphone object) or streamed from Flash Media Server

(NetStream object).

6 Client-Side ActionScript Language Reference

ActionScript elements

Entries in this document are alphabetical by class name and then by method, property, or

event handler name. The following table lists all classes, methods, properties, and event

handlers individually in alphabetical order.

NetConnection class Manages a bidirectional connection between Flash Player and a

server, which lets you connect to Flash Remoting or to Flash

Media Server.

NetStream class Opens a one-way streaming connection between Flash Player

and Flash Media Server through a connection made available by

a NetConnection object.

SharedObject class Allows real-time data sharing between multiple client SWF files

and objects that are persistent on the local or remote location.

System class The System class contains properties related to certain

operations that take place on the user's computer, such as

operations with shared objects, local settings for cameras and

microphones, and use of the Clipboard.

Video class Lets you display live or recorded streaming video on the Stage

without embedding it in your SWF file.

ActionScript element See entry

activityLevel Camera.activityLevel, Microphone.activityLevel

attachAudio MovieClip.attachAudio(), NetStream.attachAudio()

attachVideo NetStream.attachVideo(), Video.attachVideo()

bandwidth Camera.bandwidth

bufferLength NetStream.bufferLength

bufferTime NetStream.bufferTime

call NetConnection.call()

clear SharedObject.clear(), Video.clear()

close NetConnection.close(), NetStream.close(),

SharedObject.close()

connect NetConnection.connect(), SharedObject.connect()

currentFps Camera.currentFps, NetStream.currentFps

data SharedObject.data

ActionScript class Description

ActionScript elements 7

deblocking Video.deblocking

flush SharedObject.flush()

fps Camera.fps

gain Microphone.gain

get Camera.get(), Microphone.get()

getLocal SharedObject.getLocal()

getRemote SharedObject.getRemote()

getSize SharedObject.getSize()

height Camera.height, Video.height

index Camera.index, Microphone.index

isConnected NetConnection.isConnected

keyFrameInterval Camera.keyFrameInterval

loopback Camera.loopback

liveDelay NetStream.liveDelay

motionLevel Camera.motionLevel

motionTimeOut Camera.motionTimeOut

muted Camera.muted, Microphone.muted

name Camera.name, Microphone.name

names Camera.names, Microphone.names

onActivity Camera.onActivity, Microphone.onActivity

onCuePoint NetStream.onCuePoint

onMetaData NetStream.onMetaData

onPlayStatus NetStream.onPlayStatus

onStatus Camera.onStatus, Microphone.onStatus, NetConnection.onStatus,

NetStream.onStatus, SharedObject.onStatus

onSync SharedObject.onSync

pause NetStream.pause()

play NetStream.play()

publish NetStream.publish()

quality Camera.quality

ActionScript element See entry

8 Client-Side ActionScript Language Reference

Camera class

Availability

■Flash Player 6.

■Flash Media Server (not required).

rate Microphone.rate

receiveAudio NetStream.receiveAudio()

receiveVideo NetStream.receiveVideo()

seek NetStream.seek()

send NetStream.send(), SharedObject.send()

setBufferTime NetStream.setBufferTime()

setFps SharedObject.setFps()

setGain Microphone.setGain()

setKeyFrameInterval Camera.setKeyFrameInterval()

setLoopback Camera.setLoopback()

setMode Camera.setMode()

setMotionLevel Camera.setMotionLevel()

setQuality Camera.setQuality()

setRate Microphone.setRate()

setSilenceLevel Microphone.setSilenceLevel()

setUseEchoSuppression Microphone.setUseEchoSuppression()

showSettings System.showSettings()

silenceLevel Microphone.silenceLevel

silenceTimeout Microphone.silenceTimeout

smoothing Video.smoothing

time NetStream.time

uri NetConnection.uri

useCodepage System.useCodepage

useEchoSuppression Microphone.useEchoSuppression

width Camera.width, Video.width

ActionScript element See entry

Camera class 9

The Camera class lets you capture video from a video camera attached to the computer that is

running Macromedia Flash Player. When used with Flash Media Server, this class lets you

transmit, display, and optionally record the video being captured. With these capabilities, you

can develop media applications such as video conferencing, instant messaging with video, and

so on. Flash provides similar audio capabilities; for more information, see the Microphone

class entry.

You can also use a Camera object without a server—for example, to monitor a video feed from

a webcam attached to your local system.

To create or reference a Camera object, use the Camera.get() method.

Method summary for the Camera class

NOTE

When a SWF file tries to access the camera returned by Camera.get(), Flash Player

displays a Privacy dialog box that lets the user choose whether to allow or deny access

to the camera. (Make sure your Stage size is at least 215 x 138 pixels for the Camera

class examples; this is the minimum size Flash requires to display the dialog box.) End

users and administrative users may also disable camera access on a per-site or global

basis.

Method Description

Camera.get() Returns a reference to a Camera object for capturing

video.

Camera.setKeyFrameInterval() Specifies which video frames are transmitted in full

instead of being interpolated by the video compression

algorithm.

Camera.setLoopback() Specifies whether to use a compressed video stream for a

local view of what the camera is transmitting.

Camera.setMode() Sets aspects of the camera capture mode, including

height, width, and frames per second.

Camera.setMotionLevel() Specifies how much motion is required to invoke

Camera.onActivity(true).

Camera.setQuality() Sets the maximum amount of bandwidth per second or

the required picture quality of the current outgoing video

feed.

10 Client-Side ActionScript Language Reference

Property summary for the Camera class

Property (read-only) Description

Camera.activityLevel A numeric value from 0 to 100 that specifies the amount of

motion the camera is detecting.

Camera.bandwidth The maximum amount of bandwidth the current outgoing

video feed can use, in bytes.

Camera.currentFps The rate at which the camera is capturing data, in frames per

second.

Camera.fps The rate at which you would like the camera to capture data, in

frames per second.

Camera.height The current capture height, in pixels.

Camera.index The index of the camera, as reflected in the array returned by

Camera.names.

Camera.keyFrameInterval A number that specifies which video frames are transmitted in

full instead of being interpolated by the video compression

algorithm.

Camera.loopback A Boolean value that specifies whether a local view of what

the camera is capturing is compressed or uncompressed.

Camera.motionLevel A numeric value from 0 to 100 that specifies the amount of

motion required to invoke Camera.onActivity(true).

Camera.motionTimeOut The number of milliseconds between the time the camera

stops detecting motion and the time

Camera.onActivity(false) is invoked.

Camera.muted A Boolean value that specifies whether the user has allowed

or denied access to the camera.

Camera.name The name of the camera as specified by the camera hardware.

Camera.names Class property; an array of strings containing the names of all

available video capture devices, including video capture cards

and cameras.

Camera.quality A number that specifies the current level of picture quality

based on the amount of compression being applied to each

video frame.

Camera.width The current capture width, in pixels.

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