截屏遇到"Error #2123: 安全沙箱冲突"等问题(服务端为RED5)

问题描述 :

使用 BitmapData/draw() 方法报错如下

SecurityError: Error #2123: 安全沙箱冲突:BitmapData.draw:http://192.168.141.1:8080/js/flex/SunVideo.swf 不能访问 rtmp://192.168.141.1/SunVST。未被授权访问任何策略文件。

使用  ImageSnapshot.captureBitmapData(panel); 截屏报错如下 :

TypeError: Error #1009: 无法访问空对象引用的属性或方法。

两种方式其实都是一种错 , 都是没有获取到data

解决方案 :

在red5服务端修改任一spring的xml配置文件添加信息如下 :

    <bean id="rtmpSampleAccess" class="org.red5.server.stream.RtmpSampleAccess">
        <property name="audioAllowed" value="true"/>
        <property name="videoAllowed" value="true"/>
    </bean>

相关说明 : 
audioAllowed是音频相关的 ,

videoAllowed是视频相关的(截屏的话关改他就行)

red5服务端类 org.red5.server.net.rtmp.Channel 的 sendStatus方法中 :

public void sendStatus(Status status) {
        final boolean andReturn = !status.getCode().equals(StatusCodes.NS_DATA_START);
        final Notify event;
        if (andReturn) {
            final PendingCall call = new PendingCall(null, "onStatus", new Object[] { status });
            event = new Invoke();
            if (status.getCode().equals(StatusCodes.NS_PLAY_START)) {    
                IScope scope = connection.getScope();
                if (scope.getContext().getApplicationContext().containsBean(IRtmpSampleAccess.BEAN_NAME)) {//加入上面那段spring配置就会进入该if语句内
                    IRtmpSampleAccess sampleAccess = (IRtmpSampleAccess) scope.getContext().getApplicationContext().getBean(IRtmpSampleAccess.BEAN_NAME);
                    boolean videoAccess = sampleAccess.isVideoAllowed(scope);
                    boolean audioAccess = sampleAccess.isAudioAllowed(scope);
                    if (videoAccess || audioAccess) {
                        final Call call2 = new Call(null, "|RtmpSampleAccess", null);
                        Notify notify = new Notify();
                        notify.setInvokeId(1);
                        notify.setCall(call2);
                        notify.setData(IoBuffer.wrap(new byte[] { 0x01, (byte) (audioAccess ? 0x01 : 0x00), 0x01, (byte) (videoAccess ? 0x01 : 0x00) }));
                        write(notify, connection.getStreamIdForChannel(id));
                    }
                }
            }
            event.setInvokeId(1);
            event.setCall(call);
        } else {
            final Call call = new Call(null, "onStatus", new Object[] { status });
            event = new Notify();
            event.setInvokeId(1);
            event.setCall(call);
        }
        // We send directly to the corresponding stream as for
        // some status codes, no stream has been created and thus
        // "getStreamByChannelId" will fail.
        write(event, connection.getStreamIdForChannel(id));
    }

IRtmpSampleAccess.BEAN_NAME的值为rtmpSampleAccess ; 加入上面那段spring配置就会进入该if语句内 ; 然后就可以截屏了...

之前试过 crossdomain.xml   ,  NetStream.send("|RtmpSampleAccess", true, true) 等方法没有成功