Is Flash Server required to incrementally "stream" audio?
I need the ability to jump forward through an mp3 file
without downloading
the entire file.
Do I need Flash Server to do this?
Thank you
"David Stiller" <[email protected]> wrote in
message
news:ggjt48$29r$[email protected]..
> Tim,
>
>> I need the ability to jump forward through an mp3
file without
>> downloading the entire file.
>> Do I need Flash Server to do this?
>
> Yes. Flash Media Server gives you RTMP, which is the
protocol you need
> for that sort of streaming. Without FMS, you're using
HTTP -- the same
> protocol the browser uses to download HTML, JGPs, CSS
files, and nearly
> everything else.
>
>
> David Stiller
> Adobe Community Expert
> Dev blog,
http://www.quip.net/blog/
> "Luck is the residue of good design."
>
Thank you. It would be nice if a watered down version of
Flash Server
existed for people who only need to incrementally stream
audio.
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Code sample below (it's quick and dirty! ).
THanks in advance!
<?xml version="1.0" encoding="utf-8"?>
<s:View xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark" title="Audio" creationComplete="init()">
<s:layout>
<s:VerticalLayout paddingLeft="10" paddingRight="10"
paddingTop="10" paddingBottom="10"/>
</s:layout>
<fx:Script>
<![CDATA[
import flash.media.Video;
import flash.net.NetConnection;
import flash.net.NetStream;
import mx.core.UIComponent;
private var vid:Video;
private var videoHolder:UIComponent;
private var nc:NetConnection;
private var defaultURL:String="[STREAM]";
private var streamName:String="[STREAMNAME]";
private var ns:NetStream;
private var msg:Boolean;
private var intervalMonitorBufferLengthEverySecond:uint;
private function init():void
vid=new Video();
vid.width=864;
vid.height=576;
vid.smoothing = true;
//Attach the video to the stage
videoHolder = new UIComponent();
videoHolder.addChild(vid);
addEventListener(SecurityErrorEvent.SECURITY_ERROR, onSecurityError);
grpVideo.addElement(videoHolder);
connect();
public function onSecurityError(e:SecurityError):void
trace("Security error: ");
public function connect():void
nc = new NetConnection();
nc.client = this;
nc.addEventListener(NetStatusEvent.NET_STATUS, netStatusHandler);
nc.objectEncoding = flash.net.ObjectEncoding.AMF0;
nc.connect(defaultURL);
public function netStatusHandler(e:NetStatusEvent):void
switch (e.info.code) {
case "NetConnection.Connect.Success":
trace("audio - Connected successfully");
createNS();
break;
case "NetConnection.Connect.Closed":
trace("audio - Connection closed");
//connect();
break;
case "NetConnection.Connect.Failed":
trace("audio - Connection failed");
break;
case "NetConnection.Connect.Rejected":
trace("audio - Connection rejected");
break;
case "NetConnection.Connect.AppShutdown":
trace("audio - App shutdown");
break;
case "NetConnection.Connect.InvalidApp":
trace("audio - Connection invalid app");
break;
default:
trace("audio - " + e.info.code + "-" + e.info.description);
break;
public function createNS():void
trace("Creating NetStream");
ns=new NetStream(nc);
//nc.call("FCSubscribe", null, "live_production"); // Only use this if your CDN requires it
ns.addEventListener(NetStatusEvent.NET_STATUS, netStreamStatusHandler);
vid.attachNetStream(ns);
//Handle onMetaData and onCuePoint event callbacks: solution at http://tinyurl.com/mkadas
//See another solution at http://www.adobe.com/devnet/flash/quickstart/metadata_cue_points/
var infoClient:Object = new Object();
infoClient.onMetaData = function oMD():void {};
infoClient.onCuePoint = function oCP():void {};
ns.client = infoClient;
ns.bufferTime = 0;
ns.play(streamName);
ns.addEventListener(AsyncErrorEvent.ASYNC_ERROR, asyncErrorHandler);
function asyncErrorHandler(event:AsyncErrorEvent):void {
trace(event.text);
intervalMonitorBufferLengthEverySecond = setInterval(monPlayback, 1000);
public function netStreamStatusHandler(e:NetStatusEvent):void
switch (e.info.code) {
case "NetStream.Buffer.Empty":
trace("audio - Buffer empty: ");
break;
case "NetStream.Buffer.Full":
trace("audio - Buffer full:");
break;
case "NetStream.Play.Start":
trace("audio - Play start:");
break;
default:
trace("audio - " + e.info.code + "-" + e.info.description);
break;
public function monPlayback():void {
// Print current buffer length
trace("audio - Buffer length: " + ns.bufferLength);
trace("audio - FPS: " + ns.currentFPS);
trace("audio - Live delay: " + ns.liveDelay);
public function onBWDone():void {
//Do nothing
public function onFCSubscribe(info:Object):void {
// Do nothing. Prevents error if connecting to CDN.
public function onFCUnsubscribe(info:Object):void {
// Do nothing. Prevents error if connecting to CDN.
]]>
</fx:Script>
<s:Group id="grpVideo">
</s:Group>
</s:View>Just an update on this for anyone coming along after me.
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My problem was the buffertime. The docs seemed to indicate it shoudl be set to 0 for live streaming, however switching it to "1" solved my problem on the particular stream I was pointing at.
So essentially justchanged the above line:
ns.bufferTime = 0;
to
ns.bufferTime = 1;
Would be great to find out if anyone has gotten AAC working however... -
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A friend and I are tossing around some ideas for a project, which would be a music-activated RGB lights controller. We have an ARM board with network connectivity, running Linux. What we want to be able to do is to stream audio from a laptop/desktop computer to the device, for processing. I'm not sure what software to use on the computer, for streaming, as well as client software on the embedded board. Here are my primary constraints:
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