flex4+fms3.5+cs4开发实时音视频直播及点播详解

开发工具及环境：

1)flash builder4

2)flash cs4

3)flash media server3.5

fms部分

fms是adobe的流媒体服务器，不过是收费的，价格大概是oracle的一半，不过还是觉得挺贵的。adobe提供控制连接数的开发人员版，除了这点具体和完全版一样。服务器的配置网上很多，大家一搜就一大把。

其中关键的是：

由于需求是不仅要提供直播，而且还能点播历史音视频。而as的NetStream的publish方法提供的录制功能是将录制的视频放在直播的同一个文件夹下，所以要需要改一下fms配置。

1）fms的dvr默认是关闭的，需要修改C:/Program Files/Adobe/Flash Media Server 3.5/applications/live/main.far里的Application.xml，将文件中的
<StreamManager>
<StreamRecord override="no">false</StreamRecord>
</StreamManager>

改为
<StreamManager>
<StreamRecord override="yes">true</StreamRecord>
</StreamManager>

修改后重新加入main.far中

2）fms默认是将直播与点播文件目录分开的（live和vod），但是视频录制是在live文件加下，所以我们要修改点播目录

C:/Program Files/Adobe/Flash Media Server 3.5/conf/fms.ini文件中将
VOD_DIR 设置为 C:/Program Files/Adobe/Flash Media Server 3.5/applications/live
这样就可以实现直播点播同文件夹共存了

3）配置虚拟目录

打开C:/Program Files/Adobe/Flash Media Server 3.5/applications/live/Application.xml在<VirtualDirectory>中加入
<Streams>/;${VOD_COMMON_DIR}</Streams>
<Streams>/;${VOD_DIR}</Streams>

补充：如果在flex中直播视频时抛出noAccess错误，请在服务器上给录制机分配写入的权限。
通过以上配置fms就完成了

flex部分

<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009"
                       xmlns:s="library://ns.adobe.com/flex/spark"
                       xmlns:mx="library://ns.adobe.com/flex/mx" width="" height=""
                       creationComplete="init_creationCompleteHandler(event)"
                       closing="unonload()">
    <s:layout>
        <s:BasicLayout/>
    </s:layout>
    <fx:Style source="media.css"/> 

    <fx:Script>
        <!--[CDATA[
            import flash.events.NetStatusEvent;
            import flash.net.NetConnection;
            import flash.net.NetStream;  

            import mx.collections.ArrayCollection;
            import mx.controls.Alert;
            import mx.controls.Text;
            import mx.events.FlexEvent;  

            private var nc:NetConnection;
            private var ns:NetStream;
            private var vi:Video;
            private var cam:Camera;
            private var microphone:Microphone;
            private var fmsArr:ArrayCollection=new ArrayCollection([]);
            private var sharedObject:SharedObject=SharedObject.getLocal("com.ue");   

            /**
             * 初始化
             */
            protected function init_creationCompleteHandler(event:FlexEvent):void{
                var loader:URLLoader = new URLLoader();
                loader.dataFormat=URLLoaderDataFormat.VARIABLES;
                loader.addEventListener(Event.COMPLETE, loader_complete);
                loader.load(new URLRequest("global.txt"));  

                function loader_complete(e:Event):void {
                    var variables:URLVariables=new URLVariables(loader.data);
                    trace(variables["servers"]);  

                    var serversArr:Array = variables["servers"].toString().split("@#@");
                    for(var i:int=;i<serversArr.length;i++){
                        var server:String = serversArr[i];
                        var sArr:Array = server.toString().split("$#$");  

                        fmsArr.addItem({label:sArr[], value:sArr[]});
                    }
                }  

                getCookie();
            }  

            public function getCookie():void{
                if(sharedObject.data["pmhidh"]!=null){
                    pmhID.text = sharedObject.data["pmhidh"];
                }
                if(sharedObject.data["spfwq"]!=null){
                    trace(sharedObject.data["spfwq"]);
                    fms.selectedItem = sharedObject.data["spfwq"];
                }
                if(sharedObject.data["yl"]!=null){
                    slider.value = sharedObject.data["yl"];
                }  

            }  

            /**
             * 开始直播
             */
            protected function startButton_clickHandler(event:MouseEvent):void{  

                startButton.enabled=false;
                stopButton.enabled=true;
                nc = new NetConnection();
                nc.addEventListener(NetStatusEvent.NET_STATUS,connectServerHander);
                nc.client  = this;  

                trace(fms.selectedItem.label);
                nc.connect(fms.selectedItem.value);    

                slider.enabled=true;
            }
            /**
             * 回调函数
             */
            public function connectServerHander(evt:NetStatusEvent):void{
                cam = Camera.getCamera();
                microphone = Microphone.getMicrophone();  

                if(microphone!=null){
                    microphone.setSilenceLevel();//总是收集音频
                    microphone.rate=;
                }else{
                    Alert.show("无法链接到麦克风！");
                }  

                if(cam != null){
                    cam.setMode(,,);
                    cam.setQuality(,);
                    ns = new NetStream(nc);
                    ns.attachCamera(cam);
                    ns.attachAudio(microphone);
                    ns.publish(pmhID.text,"append");     

                    vi = new Video();
                    vi.width = player.width;
                    vi.height = player.height;
                    vi.attachCamera(cam);
                    player.addChild(vi);     

                }else{
                    Alert.show("无法链接到摄像头！");
                }
            }
            /**
             * NetConnection回调函数
             */
            public function onBWDone():void{}   

            /**
             * 保存音视频文件
             */
//          protected function browse_clickHandler(event:MouseEvent):void{
//              var file:File = new File();
//              file.addEventListener(Event.SELECT,dirSelected);
//              file.browseForSave("另存为");
//              function dirSelected(e:Event):void {
//                  trace(file.nativePath);
//                  filefilePath.text = file.nativePath;
//              }
//          }  

            /**
             * 音量控制
             */
            protected function slider_changeHandler(event:Event):void{
                microphone.gain = slider.value;
            }  

            /**
             * 停止发布
             */
            protected function stopButton_clickHandler(event:MouseEvent):void{
                ns.close();
                vi.visible=false;
                startButton.enabled=true;
                stopButton.enabled=false;
            }  

            /**
             * 关闭窗口触发事件,保存配置
             */
            public function unonload():void{
                if(sharedObject!=null){
                    sharedObject.clear();
                }
                if(sharedObject.data["pmhidh"]==null){
                    sharedObject.data["pmhidh"] = pmhID.text;
                }
                if(sharedObject.data["spfwq"]==null){
                    sharedObject.data["spfwq"] = fms.selectedItem;
                }
                if(sharedObject.data["yl"]==null){
                    sharedObject.data["yl"] = slider.value;
                }
                sharedObject.flush();
            }  

        ]]-->
    </fx:Script> 

    <fx:Declarations>
        <!-- 将非可视元素（例如服务、值对象）放在此处 -->
    </fx:Declarations>
    <s:Panel width="100%" height="100%" x="" y="" id="panel1">
        <s:layout>
            <s:VerticalLayout paddingLeft="" paddingRight="" paddingBottom="" paddingTop="" requestedRowCount=""/>
        </s:layout>
        <s:VGroup width="" height="" paddingTop="" paddingBottom="" paddingRight="" paddingLeft="">
            <s:HGroup width="" height="" paddingLeft="" paddingTop="" paddingBottom="" paddingRight="">
                <s:BorderContainer width="" height="">
                    <s:VideoDisplay width="" height="" scaleMode="letterbox" id="player" x="" y=""/>
                </s:BorderContainer>
                <s:BorderContainer width="" height="">
                    <s:VGroup width="" height="" paddingLeft="" paddingTop="" paddingBottom=""   

paddingRight="" gap="" x="" y="">
                        <s:Label text="拍卖会ID号：" height="" id="pmhIDLabel"/>
                        <s:TextInput id="pmhID"/>
                        <s:Label text="视频服务器：" height=""/>
                        <s:ComboBox id="fms" dataProvider="{fmsArr}"/>
                        <s:Label text="音量" height=""/>
                        <s:HSlider id="slider" enabled="false" change="slider_changeHandler(event)" minimum=""   

maximum="" stepSize=""/>
                    </s:VGroup>
                </s:BorderContainer>
            </s:HGroup>
            <s:HGroup width="" height="" paddingTop="" paddingBottom="" paddingRight="" paddingLeft=""   

verticalAlign="middle" textAlign="center">
                <s:Button id="startButton" label="开始发布" click="startButton_clickHandler(event)"/>
                <s:Button label="停止发布" id="stopButton" enabled="false" click="stopButton_clickHandler(event)"/>
            </s:HGroup>
        </s:VGroup>
    </s:Panel>
</s:WindowedApplication> 

效果如下：

flash部分/点播代码

import flash.net.*;
import flash.events.*;  

var loader:URLLoader = new URLLoader();
loader.dataFormat=URLLoaderDataFormat.VARIABLES;
loader.addEventListener(Event.COMPLETE, loader_complete);
loader.load(new URLRequest("media2.txt"));  

function loader_complete(e:Event):void {
    var variables:URLVariables=new URLVariables(loader.data);  

    myVideo2.source=variables["source"];
}
myVideo2.isLive=false; 

效果如下：

flash部分/直播代码

import flash.net.*;
import flash.events.*;  

var loader:URLLoader = new URLLoader();
loader.dataFormat=URLLoaderDataFormat.VARIABLES;
loader.addEventListener(Event.COMPLETE, loader_complete);
loader.load(new URLRequest("media.txt"));  

function loader_complete(e:Event):void {
    var variables:URLVariables=new URLVariables(loader.data);  

    myVideo.source=variables["source"];
}  

myVideo.isLive=true; 

效果如下：