Question

我正在使用Action Script作为具有Red5 Media Server的客户端。我的视频有2个问题：

视频录制不正确，播放效果不佳。
有时视频从15-20秒开始，而不是从0秒开始。

我写了以下代码：

   private function onStart():void
 {  

  mic = Microphone.getMicrophone();
  cam = Camera.getCamera();

  if(cam!=null)
  {
   cam.addEventListener(StatusEvent.STATUS, onDivStatus);
   ns.attachCamera(cam)
   cam.setQuality( 0, 100 );;


  }
  else
  {
   trace("you need to check webcam setting:");

  }
  if(mic != null)
  {
   mic.setUseEchoSuppression(true);
   mic.setSilenceLevel(5, 1000);
   mic.addEventListener(StatusEvent.STATUS, onDivStatus);
   ns.attachAudio(mic);
  }
  else
  {
   trace("you need to check Microphone setting:");
  }


  webCamRecording.video1.attachCamera(cam);
  webCamRecording.video1.smoothing = true;

}
 var timer:Timer;
 public function startRecording():void
 {
  ns.publish(webCamRecording.userName,"record"); 
  webCamRecording.stopBtn.visible = true;
  webCamRecording.stopBtn.addEventListener(MouseEvent.CLICK,stopRecording)
  timer = new Timer(1000,10*60);
  timer.addEventListener(TimerEvent.TIMER, onTimer);
  timer.addEventListener(TimerEvent.TIMER_COMPLETE, onComplete);
  timer.start(); 
 }

 private function stopRecording(evt:MouseEvent):void
 {
  trace("call external function::::::::::::::D>>>>>> ");
  timer.stop();
  webCamRecording.video1.clear();
     ns = null
     webCamRecording.video1.visible = false;

  }

我检查了日志并找到了以下错误：

java.lang.IllegalArgumentException
        at java.nio.Buffer.position(Buffer.java:236)
        at sun.nio.ch.IOUtil.write(IOUtil.java:68)
        at sun.nio.ch.FileChannelImpl.write(FileChannelImpl.java:205)
        at org.red5.io.flv.impl.FLVWriter.writeTag(FLVWriter.java:254)
        at org.red5.io.flv.impl.FLVWriter.writeMetadataTag(FLVWriter.java:371)
        at org.red5.io.flv.impl.FLVWriter.writeTag(FLVWriter.java:226)
        at org.red5.server.stream.consumer.FileConsumer.write(FileConsumer.java:333)
        at org.red5.server.stream.consumer.FileConsumer.doWrites(FileConsumer.java:292)
        at org.red5.server.stream.consumer.FileConsumer$1.run(FileConsumer.java:180)
Exception in thread "Thread-12" java.lang.IllegalArgumentException
        at java.nio.Buffer.position(Buffer.java:236)
        at sun.nio.ch.IOUtil.write(IOUtil.java:68)
        at sun.nio.ch.FileChannelImpl.write(FileChannelImpl.java:205)
        at org.red5.io.flv.impl.FLVWriter.writeTag(FLVWriter.java:254)
        at org.red5.server.stream.consumer.FileConsumer.write(FileConsumer.java:333)
        at org.red5.server.stream.consumer.FileConsumer.doWrites(FileConsumer.java:292)
        at org.red5.server.stream.consumer.FileConsumer$1.run(FileConsumer.java:180)
Exception in thread "Thread-15" java.nio.BufferOverflowException
        at java.nio.Buffer.nextPutIndex(Buffer.java:519)
        at java.nio.HeapByteBuffer.putInt(HeapByteBuffer.java:366)
        at org.apache.mina.core.buffer.AbstractIoBuffer.putInt(AbstractIoBuffer.java:743)
        at org.red5.io.flv.impl.FLVWriter.writeTag(FLVWriter.java:251)
        at org.red5.server.stream.consumer.FileConsumer.write(FileConsumer.java:333)
        at org.red5.server.stream.consumer.FileConsumer.doWrites(FileConsumer.java:292)
        at org.red5.server.stream.consumer.FileConsumer$1.run(FileConsumer.java:180)
Exception in thread "Thread-18" java.nio.BufferOverflowException
        at java.nio.DirectByteBuffer.put(DirectByteBuffer.java:357)
        at java.nio.DirectByteBuffer.put(DirectByteBuffer.java:336)
        at sun.nio.ch.IOUtil.write(IOUtil.java:60)
        at sun.nio.ch.FileChannelImpl.write(FileChannelImpl.java:205)
        at org.red5.io.flv.impl.FLVWriter.writeTag(FLVWriter.java:254)
        at org.red5.server.stream.consumer.FileConsumer.write(FileConsumer.java:333)
        at org.red5.server.stream.consumer.FileConsumer.doWrites(FileConsumer.java:292)
        at org.red5.server.stream.consumer.FileConsumer$1.run(FileConsumer.java:180)
Exception in thread "Thread-20" java.lang.IllegalArgumentException
        at java.nio.Buffer.position(Buffer.java:236)
        at sun.nio.ch.IOUtil.write(IOUtil.java:68)
        at sun.nio.ch.FileChannelImpl.write(FileChannelImpl.java:205)
        at org.red5.io.flv.impl.FLVWriter.writeTag(FLVWriter.java:254)
        at org.red5.server.stream.consumer.FileConsumer.write(FileConsumer.java:333)
        at org.red5.server.stream.consumer.FileConsumer.doWrites(FileConsumer.java:292)
        at org.red5.server.stream.consumer.FileConsumer$1.run(FileConsumer.java:180)
Exception in thread "Thread-34" java.lang.IllegalArgumentException
        at java.nio.Buffer.position(Buffer.java:236)
        at sun.nio.ch.IOUtil.write(IOUtil.java:68)
        at sun.nio.ch.FileChannelImpl.write(FileChannelImpl.java:205)
        at org.red5.io.flv.impl.FLVWriter.writeTag(FLVWriter.java:278)
        at org.red5.server.stream.consumer.FileConsumer.write(FileConsumer.java:333)
        at org.red5.server.stream.consumer.FileConsumer.doWrites(FileConsumer.java:292)
        at org.red5.server.stream.consumer.FileConsumer$1.run(FileConsumer.java:180)
Exception in thread "Thread-43" java.lang.IllegalArgumentException
        at java.nio.Buffer.position(Buffer.java:236)
        at java.nio.DirectByteBuffer.put(DirectByteBuffer.java:337)
        at sun.nio.ch.IOUtil.write(IOUtil.java:60)
        at sun.nio.ch.FileChannelImpl.write(FileChannelImpl.java:205)
        at org.red5.io.flv.impl.FLVWriter.writeTag(FLVWriter.java:278)
        at org.red5.server.stream.consumer.FileConsumer.write(FileConsumer.java:333)
        at org.red5.server.stream.consumer.FileConsumer.doWrites(FileConsumer.java:292)
        at org.red5.server.stream.consumer.FileConsumer$1.run(FileConsumer.java:180)
Exception in thread "Thread-44" java.lang.IllegalArgumentException
        at java.nio.Buffer.position(Buffer.java:236)
        at sun.nio.ch.IOUtil.write(IOUtil.java:68)
        at sun.nio.ch.FileChannelImpl.write(FileChannelImpl.java:205)
        at org.red5.io.flv.impl.FLVWriter.writeTag(FLVWriter.java:278)
        at org.red5.server.stream.consumer.FileConsumer.write(FileConsumer.java:333)
        at org.red5.server.stream.consumer.FileConsumer.doWrites(FileConsumer.java:292)
        at org.red5.server.stream.consumer.FileConsumer$1.run(FileConsumer.java:180)
Exception in thread "Thread-48" java.lang.IllegalArgumentException
        at java.nio.Buffer.position(Buffer.java:236)
        at sun.nio.ch.IOUtil.write(IOUtil.java:68)
        at sun.nio.ch.FileChannelImpl.write(FileChannelImpl.java:205)
        at org.red5.io.flv.impl.FLVWriter.writeTag(FLVWriter.java:278)
        at org.red5.server.stream.consumer.FileConsumer.write(FileConsumer.java:333)
        at org.red5.server.stream.consumer.FileConsumer.doWrites(FileConsumer.java:292)
        at org.red5.server.stream.consumer.FileConsumer$1.run(FileConsumer.java:180)
Exception in thread "Thread-65" java.nio.BufferOverflowException
        at java.nio.DirectByteBuffer.put(DirectByteBuffer.java:357)
        at java.nio.DirectByteBuffer.put(DirectByteBuffer.java:336)
        at sun.nio.ch.IOUtil.write(IOUtil.java:60)
        at sun.nio.ch.FileChannelImpl.write(FileChannelImpl.java:205)
        at org.red5.io.flv.impl.FLVWriter.writeTag(FLVWriter.java:254)
        at org.red5.server.stream.consumer.FileConsumer.write(FileConsumer.java:333)
        at org.red5.server.stream.consumer.FileConsumer.doWrites(FileConsumer.java:292)
        at org.red5.server.stream.consumer.FileConsumer$1.run(FileConsumer.java:180)
Exception in thread "Thread-68" java.lang.IllegalArgumentException
        at java.nio.Buffer.position(Buffer.java:236)
        at sun.nio.ch.IOUtil.write(IOUtil.java:68)
        at sun.nio.ch.FileChannelImpl.write(FileChannelImpl.java:205)
        at org.red5.io.flv.impl.FLVWriter.writeTag(FLVWriter.java:278)
        at org.red5.server.stream.consumer.FileConsumer.write(FileConsumer.java:333)
        at org.red5.server.stream.consumer.FileConsumer.doWrites(FileConsumer.java:292)
        at org.red5.server.stream.consumer.FileConsumer$1.run(FileConsumer.java:180)
Exception in thread "Thread-71" java.nio.BufferOverflowException
        at java.nio.DirectByteBuffer.put(DirectByteBuffer.java:357)
        at java.nio.DirectByteBuffer.put(DirectByteBuffer.java:336)
        at sun.nio.ch.IOUtil.write(IOUtil.java:60)
        at sun.nio.ch.FileChannelImpl.write(FileChannelImpl.java:205)
        at org.red5.io.flv.impl.FLVWriter.writeTag(FLVWriter.java:254)
        at org.red5.server.stream.consumer.FileConsumer.write(FileConsumer.java:333)
        at org.red5.server.stream.consumer.FileConsumer.doWrites(FileConsumer.java:292)
        at org.red5.server.stream.consumer.FileConsumer$1.run(FileConsumer.java:180)
[INFO] [NioProcessor-1] org.red5.server.stream.ClientBroadcastStream - Close
[INFO] [NioProcessor-1] org.red5.server.stream.ClientBroadcastStream - Provider disconnect
[INFO] [NioProcessor-1] org.red5.server.stream.ClientBroadcastStream - Provider disconnect
[INFO] [NioProcessor-1] org.red5.server.stream.ClientBroadcastStream - Provider disconnect

如果有人有解决方案可以帮助我。感谢。

Answer 1

根据个人经验，Red5不会录制好录音。

尝试其他服务器，例如具有相同Flash客户端的Wowza Developer Server，看看你是否获得了更好的结果。如果你这样做，那就是Red5问题，并且更容易切换服务器。

您可以通过增加缓冲区并等待缓冲区上传来尝试一些优化。

Answer 2

Red5 0.9 完全没有录制过程。

Red5 0.8 做得相当不错，但在通过慢速连接进行流式传输/录制时无法解释Flash Player对视频数据的音频优先级。因此，当通过慢速连接录制高质量视频时，最终文件中的音频和视频将不会同步。

Red5 1.0 RC1 引入了一种几乎有效的延迟写入机制。

Red5 1.0 final，1.0.1和1.0.2 延迟写入机制完全有缺陷导致flv文件有1个视频关键帧，其余只有音频通过慢速连接录制。

用于录制的最佳Red5版本是经过修补的Red5 1.0.2 ，可在此博文中找到：Recording high quality (HD) video over slow connections with Red5 is now possible

The patch has also been applied to Red5's source code on GitHub它也将在下一个官方版本中提供（1.0.3）。

我是该补丁的作者，我一劳永逸地修复了Red5录音。它很棒。

Red5服务器中AS3中的视频录制问题

2 个答案: