最简单的基于Flash的流媒体示例：RTMP推送和接收（ActionScript）

/**
 * 最简单的基于ActionScript的RTMP播放器
 * Simplest AS3 RTMP Player
 *
 * 雷霄骅 Lei Xiaohua
 * leixiaohua1020@126.com
 * 中国传媒大学/数字电视技术
 * Communication University of China / Digital TV Technology
 * http://blog.csdn.net/leixiaohua1020
 * 
 * 本程序使用ActionScript3语言完成，播放RTMP服务器上的流媒体
 * 是最简单的基于ActionScript3的播放器。
 *
 * This software is written in Actionscript3, it plays stream
 * on RTMP server
 * It's the simplest RTMP player based on ActionScript3.
 * 
 */
package {
    import flash.display.Sprite;
    import flash.net.NetConnection;
    import flash.events.NetStatusEvent;
    import flash.events.AsyncErrorEvent;
    import flash.net.NetStream;
    import flash.media.Video;


    public class simplest_as3_rtmp_player extends Sprite
    {
        var nc:NetConnection;
        var ns:NetStream;
        var video:Video;


        public function simplest_as3_rtmp_player()
        {
            nc = new NetConnection();
            nc.addEventListener(NetStatusEvent.NET_STATUS, netStatusHandler);
            nc.connect("rtmp://localhost/live");
        }






        private function netStatusHandler(event:NetStatusEvent):void
        {
            trace("event.info.level: " + event.info.level + "\n", "event.info.code: " + event.info.code);
            switch (event.info.code)
            {
                case "NetConnection.Connect.Success":
                    doVideo(nc);
                    break;
                case "NetConnection.Connect.Failed":
                    break;
                case "NetConnection.Connect.Rejected":
                    break;
                case "NetStream.Play.Stop":
                    break;
                case "NetStream.Play.StreamNotFound":
                    break;
            }
        }




        // play a recorded stream on the server
        private function doVideo(nc:NetConnection):void {
            ns = new NetStream(nc);
            ns.addEventListener(NetStatusEvent.NET_STATUS, netStatusHandler);


            video = new Video(640,480);
            video.attachNetStream(ns);


            ns.play("myCamera");
            addChild(video);
        }


        // create a playlist on the server
        /*
        private function doPlaylist(nc:NetConnection):void {
            ns = new NetStream(nc);
            ns.addEventListener(NetStatusEvent.NET_STATUS, netStatusHandler);


            video = new Video();
            video.attachNetStream(ns);


            // Play the first 3 seconds of the video
            ns.play( "bikes", 0, 3, true );
            // Play from 20 seconds on
            ns.play( "bikes", 20, -1, false);
            // End on frame 5
            ns.play( "bikes", 5, 0, false );
            addChild(video);
        }
        */
    }
}

nc.connect("rtmp://localhost/live");

nc.connect(null);

ns.play("myCamera");

ns.play("sintel.flv");

/**
 * 最简单的基于ActionScript的RTMP推流器
 * Simplest AS3 RTMP Streamer
 *
 * 雷霄骅 Lei Xiaohua
 * leixiaohua1020@126.com
 * 中国传媒大学/数字电视技术
 * Communication University of China / Digital TV Technology
 * http://blog.csdn.net/leixiaohua1020
 * 
 * 本程序使用ActionScript3语言完成，推送本地摄像头的数据至RTMP流媒体服务器，
 * 是最简单的基于ActionScript3的推流器。
 *
 * This software is written in Actionscript3, it streams camera's video to
 * RTMP server.
 * It's the simplest RTMP streamer based on ActionScript3.
 * 
 */




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


    public class simplest_as3_rtmp_streamer extends MovieClip
    {
        var nc:NetConnection;
        var ns:NetStream;
        var nsPlayer:NetStream;
        var vid:Video;
        var vidPlayer:Video;
        var cam:Camera;
        var mic:Microphone;
        
        var screen_w:int=320;
        var screen_h:int=240;


        public function simplest_as3_rtmp_streamer()
        {
            nc = new NetConnection();
            nc.addEventListener(NetStatusEvent.NET_STATUS, onNetStatus);
            nc.connect("rtmp://localhost/live");
        }


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


        private function publishCamera() {
            
            //Cam
            
            cam = Camera.getCamera();


            /**
             * public function setMode(width:int, height:int, fps:Number, favorArea:Boolean = true):void  
             *  width:int — The requested capture width, in pixels. The default value is 160.  
             *  height:int — The requested capture height, in pixels. The default value is 120.  
             *  fps:Number — The requested capture frame rate, in frames per second. The default value is 15.  
             */
            cam.setMode(640, 480, 15);  
            
            /**
             * public function setKeyFrameInterval(keyFrameInterval:int):void
             * The number of video frames transmitted in full (called keyframes) instead of being interpolated by the video compression algorithm.
             * The default value is 15, which means that every 15th frame is a keyframe. A value of 1 means that every frame is a keyframe. 
             * The allowed values are 1 through 300. 
             */
            cam.setKeyFrameInterval(25);
            
            /**
             * public function setQuality(bandwidth:int, quality:int):void  
             * bandwidth:int — Specifies the maximum amount of bandwidth that the current outgoing video feed can use, in bytes per second (bps).   
             *    To specify that the video can use as much bandwidth as needed to maintain the value of quality, pass 0 for bandwidth.   
             *    The default value is 16384.  
             * quality:int — An integer that specifies the required level of picture quality, as determined by the amount of compression   
             *     being applied to each video frame. Acceptable values range from 1 (lowest quality, maximum compression) to 100   
             *    (highest quality, no compression). To specify that picture quality can vary as needed to avoid exceeding bandwidth,   
             *    pass 0 for quality.  
             */
            cam.setQuality(200000, 90); 
            
            /**
             * public function setProfileLevel(profile:String, level:String):void
             * Set profile and level for video encoding. 
             * Possible values for profile are H264Profile.BASELINE and H264Profile.MAIN. Default value is H264Profile.BASELINE.
             * Other values are ignored and results in an error.
             * Supported levels are 1, 1b, 1.1, 1.2, 1.3, 2, 2.1, 2.2, 3, 3.1, 3.2, 4, 4.1, 4.2, 5, and 5.1.
             * Level may be increased if required by resolution and frame rate.
             */
            //var h264setting:H264VideoStreamSettings = new H264VideoStreamSettings();  
            // h264setting.setProfileLevel(H264Profile.MAIN, 4);   
            
            
            //Mic
            
            mic = Microphone.getMicrophone();
            
            /*
             * The encoded speech quality when using the Speex codec. Possible values are from 0 to 10. The default value is 6. 
             * Higher numbers represent higher quality but require more bandwidth, as shown in the following table. 
             * The bit rate values that are listed represent net bit rates and do not include packetization overhead. 
             * ------------------------------------------
             * Quality value | Required bit rate (kbps)
             *-------------------------------------------
             *      0        |       3.95 
             *      1        |       5.75 
             *      2        |       7.75 
             *      3        |       9.80 
             *      4        |       12.8 
             *      5        |       16.8 
             *      6        |       20.6 
             *      7        |       23.8 
             *      8        |       27.8 
             *      9        |       34.2 
             *      10       |       42.2 
             *-------------------------------------------
             */
            mic.encodeQuality = 9;  
            
            /* The rate at which the microphone is capturing sound, in kHz. Acceptable values are 5, 8, 11, 22, and 44. The default value is 8 kHz   
             * if your sound capture device supports this value. Otherwise, the default value is the next available capture level above 8 kHz that   
             * your sound capture device supports, usually 11 kHz.  
             *
             */
            mic.rate = 44;  
            
            
            ns = new NetStream(nc);
            //H.264 Setting
            //ns.videoStreamSettings = h264setting; 
            ns.attachCamera(cam);
            ns.attachAudio(mic);
            ns.publish("myCamera", "live");
        }


        private function displayPublishingVideo():void {
            vid = new Video(screen_w, screen_h);
            vid.x = 10;
            vid.y = 10;
            vid.attachCamera(cam);
            addChild(vid);
        }


        private function displayPlaybackVideo():void{
            nsPlayer = new NetStream(nc);
            nsPlayer.play("myCamera");
            vidPlayer = new Video(screen_w, screen_h);
            vidPlayer.x = screen_w + 20;
            vidPlayer.y = 10;
            vidPlayer.attachNetStream(nsPlayer);
            addChild(vidPlayer);
        }
    }
}