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);
        }
    }
}