基于flash的web视频对讲直播测试

由于项目的需求，要在web上实现视频通话的需求。
现成的方案有WebRTC，基于浏览器的成熟方案，但是这个方案和公司项目需求有几个点冲突。
后来考虑到基于flash的方案。
参考雷神的博客 simplest_as3_rtmp_streamer
http://blog.csdn.net/leixiaohua1020/article/details/43936141

本机软件环境Win7_64位下，IE11，Flash Builder 4.7, ffplay播放
摄像头采用罗技C930e，麦克风用摄像头自带的。
服务器采用SRSv2.0_r2

编码采用ActionScript3脚本语言，flash.media.Video采集视频，flash.media.Microphone采集音频，
flash.net.NetConnection连接srs服务器，flash.net.NetStream推流。

测试在局域网内视频通话。
视频采集分辨率为1280*720 30fps 200Kbps H264编码。
音频采用44100采样率 单声道 40kbps nellymoser编码。
局域网内测试延迟如下：

 

代码改写自雷神博客，服务器采用srs，特此感谢雷神，感谢Winlin。

 package {
     import flash.display.MovieClip;
     import flash.events.NetStatusEvent;
     import flash.media.Camera;
     import flash.media.H264Level;
     import flash.media.H264Profile;
     import flash.media.H264VideoStreamSettings;
     import flash.media.Microphone;
     import flash.media.SoundCodec;
     import flash.media.Video;
     import flash.net.NetConnection;
     import flash.net.NetStream;

     public class media extends MovieClip
     {
         private var nc:NetConnection;
         private var ns:NetStream;
         private var nsPlayer:NetStream;
         private var vid:Video;
         private var vidPlayer:Video;
         private var cam:Camera;
         private var mic:Microphone;

         private var screen_w:int=384;
         private var screen_h:int=216;

         public function media()
         {
             nc = new NetConnection();
             nc.client = {};
             nc.client.onBWDone = function():void {};
             nc.addEventListener(NetStatusEvent.NET_STATUS, onNetStatus);
             nc.connect("rtmp://192.168.100.168/testas3/");
             trace("NetConnection !!!");
         }

         private function onNetStatus(event:NetStatusEvent):void{
             trace(event.info.code);
             if(event.info.code == "NetConnection.Connect.Success"){
                 publishCamera();
                 displayPublishingVideo();
             }
         }

         private function publishCamera(): void{

             //Cam
             cam = Camera.getCamera();
             cam.setMode(1280, 720, 30);
             cam.setKeyFrameInterval(30);
             cam.setQuality(200000, 90); 

             var x264profile:String = H264Profile.MAIN; // H264Profile.BASELINE;
             var x264level:String = H264Level.LEVEL_4_1;
             var h264setting:H264VideoStreamSettings = new H264VideoStreamSettings();
             h264setting.setProfileLevel(x264profile, x264level); 

             //Mic
             mic = Microphone.getMicrophone();
             mic.codec = SoundCodec.NELLYMOSER;//SoundCodec.SPEEX
             mic.setLoopBack(false);
             mic.gain=55;
             mic.setUseEchoSuppression(true);
             mic.rate = 44;  

             ns = new NetStream(nc);
             ns.client = {};
             ns.addEventListener(NetStatusEvent.NET_STATUS, function(evt:NetStatusEvent):void {
                 trace ("NetStream: code=" + evt.info.code);
                 // TODO: FIXME: failed event.
             });

             //H.264 Setting
             ns.videoStreamSettings = h264setting;
             ns.attachCamera(cam);
             ns.attachAudio(mic);
             ns.publish("1111", "live");
         }

         private function displayPublishingVideo():void {
             vid = new Video(screen_w, screen_h);
             vid.x = 20;
             vid.y = 20;
             vid.attachCamera(cam);
             addChild(vid);
         }
     }
 }