Procure por *Get MetaData* que vai resolver seu problema....segue um
exemplo.

Connection Successful
MetaData recieved!
Dumping metadata:
framerate: 24
videocodecid: 4
*duration: 24.958*
videodatarate: 543
height: 180
audiocodecid: 2
canSeekToEnd: true
width: 320
audiodelay: 0.027
audiodatarate: 128
Connection Closed
Video Stopped

<?xml version="1.0" encoding="utf-8"?>
> <mx:Application
> xmlns:mx="http://www.adobe.com/2006/mxml"
> xmlns:components="components.*"
> layout="horizontal"
> width="100%" height="100%"
> styleName="samplePaddingStyle"
> >
>
> <mx:Script>
> <![CDATA[
>
> private var nc:NetConnection;
> private var ns:NetStream;
>
>
> private function doConnect() : void
> {
> //A NetConnection is the pipe between Flex/Air and Flash
> Media Server
> nc = new NetConnection();
>
> //The NetConnection has a client property to refer to an object
> or class
> //which you assign all of the server callbacks to.
> nc.client = this;
>
> //The NetStatusEvent is a dispatched status event for
> //NetConnection, NetStream, or SharedObject.
> //We want to know if the NetConnection has properly connected
> nc.addEventListener(NetStatusEvent.NET_STATUS,
> handlerNetStatus);
>
> //Connect to the location of your flash media server for
> example:
> //nc.connect("rtmp://
> fmsexamples.adobe.com/applicationName/instance");
> nc.connect("rtmp://localhost/vod");
> }
>
>
> /**
> * This is the handler function of the NetStatusEvent for the
> NetConnection.
> * Here is where we can find out the connection status and
> execute actions
> * based on each result.
> */
> private function handlerNetStatus(event:NetStatusEvent) : void
> {
> var info:Object = event.info;
>
> //Checking the event.info.code for the current NetConnection
> status string
> switch(info.code)
> {
>
> //code == NetConnection.Connect.Success when Netconnection
> has successfully
> //connected
> case "NetConnection.Connect.Success":
> doNetStream();
>
> btnConnect.selected = true;
>
> tracePanel.writeln( "Connection Successful" );
> break;
>
> //code == NetConnection.Connect.Rejected when Netconnection
> did
> //not have permission to access the application.
> case "NetConnection.Connect.Rejected":
> tracePanel.writeln( "Connection Rejected" );
>
> btnConnect.selected = false;
> break;
>
> //code == NetConnection.Connect.Failed when Netconnection
> has failed to connect
> //either because your network connection is down or the
> server address doesn't exist.
> case "NetConnection.Connect.Failed":
> tracePanel.writeln( "Connection Failed" );
>
> btnConnect.selected = false;
> break;
>
> //code == NetConnection.Connect.Closed when Netconnection
> has been closed successfully.
> case "NetConnection.Connect.Closed":
> tracePanel.writeln( "Connection Closed" );
>
> btnConnect.selected = false;
> break;
> }
> }
>
> private function doNetStream() : void
> {
> ns = videoPlayer.createNetStream(nc);
>
> /**
> * This works a little different than regular events and
> you cannot add addEventListener
> * You have to handle the callback with an object on the
> NetStream.client property.
> * The server dispatches the metadata events and looks for
> the onMetaData callback.
> *
> * When we get the netstream back from the video player
> component the client property
> * will already be an object. If you were to create the
> NetStream using ns = new NetStream()
> * you would want to do:
> *
> * var client:Object = new Object();
> * client.onMetaData = handleOnMetadata;
> * ns.client = client;
> */
>
> //We assign the onMetaData callback here
> var client:Object = ns.client;
> client.onMetaData = handleOnMetaData;
>
> videoPlayer.play("sample");
> }
>
> /**
> * This is where the callback from the server gets executed.
> * It sends down all of the information about the stream.
> */
> public function handleOnMetaData( info:Object ) : void
> {
> tracePanel.writeln( 'MetaData recieved!' );
> tracePanel.writeln( 'Dumping metadata:' );
> //Looping through the returned info and parces it into each
> property name
> //these properties are then displayed in the trace window with
> their values.
> for ( var prop:Object in info )
> {
> tracePanel.writeln( String( prop + ': ' + info[prop] ) );
> }
> }
>
> private function doStop() : void
> {
> //Stopping and disconnecting the stream from the video player
> videoPlayer.stop();
> nc.close();
>
> btnConnect.selected = false;
>
> tracePanel.writeln( "Video Stopped" );
> }
>
> private function doAction() : void
> {
> //Depending the selected state of btnConnect either
> //connect to the video stream or disconnect from it.
> if ( btnConnect.selected )
> {
> doConnect();
> }
> else
> {
> doStop();
> }
> }
>
> /**
> * This is a required callback method from the Video on Demand
> service that
> * ships with Flash Media Server. If you don't define this
> method, an
> * error will be thrown.
> */
> public function onBWDone() : void
> {
>
> }
>
> /**
> * This is a required callback method on the
> NetConnection.client. The server
> * calls this if the connection is immedately rejected. If you
> don't define this method,
> * an error will be thrown.
> */
> public function close() : void
> {
> tracePanel.writeln( 'Connection closed.' );
> }
> ]]>
> </mx:Script>
>
> <components:VideoPod
> id="videoPod" title="Video Player"
> height="100%" width="{videoPod.height}"
> maxHeight="300" maxWidth="300">
>
> <!--The VideoSeekPlayback component that displays the video stream
> -->
> <components:VideoSeekPlayback
> id="videoPlayer"
> width="100%" height="100%"
> showSeek="true"
> styleName="horzCent0"
> videoStop="doStop()"/>
>
> <mx:ControlBar
> width="100%"
> styleName="horzAlignCntr">
>
> <mx:Button
> id="btnConnect"
> label="{btnConnect.selected?'Stop':'Play'}"
> toolTip="{btnConnect.selected?'Stop':'Play'}"
> toggle="true"
> styleName="playStopButton"
> click="doAction()"/>
>
> </mx:ControlBar>
>
> </components:VideoPod>
>
> <!--The output panel for all the traced actions performed-->
> <components:TracePanel
> id="tracePanel"
> width="100%" height="100%"/>
>
> </mx:Application>
>
> Em 8 de abril de 2010 07:26, Michel MElo <machel@hotmail.it> escreveu:

>
>
>
> ol� pessoal. preciso de uma ajuda.
> estou estudando o fms para fazer
> streamig
> e ja consigo fazer algumas coisas.
> tenho a seguinte
> funcao
> nela eu capituro a musica que a pessoa quer ouvir agora. quero
> saber como posso fazer para saber o tempo desta musica.
>
> tentei varias funcoes mas nao consigo chega a esse ponto. que � saber o
> tempo.
>
> function playTune(evt:Event):void {
>
> ns.close();
> if (ComboBox (evt.target).selectedItem.data !="") {
>
> stopMusic();
>
> ns.play("mp3:"+ComboBox (evt.target).selectedItem.data);
>
> // trace( ns.bytesLoaded +"-"+ ns.bytesTotal);
> }
> };
>
> Ate mais,
>
> Michel Melo
> msn: machel@hotmail.it <machel%40hotmail.it>
> Certified Flash MX 2004 Developer
>
> Adobe Certified Flash
>
> member <http://aug.riapt.org> AUG PT
>
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