Actionscript 3 Red5服务器中AS3中的视频录制问题

我使用动作脚本作为客户端，拥有Red5媒体服务器。我的视频有两个问题：

视频录制不正确，播放不顺畅

有时视频从15-20秒开始，而不是从0秒开始

我编写了以下代码：

   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，发现以下错误：

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

---

如果有人有解决办法，请帮帮我。谢谢。

根据个人经验，Red5不能产生好的录音效果

使用相同的flash客户端尝试其他服务器，如Wowza Developer server，看看是否可以获得更好的结果。如果您这样做了，那么这是一个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载来尝试一些优化

Red5 0.9的录制过程完全中断

Red5 0.8做得相当不错，但无法解释Flash Player在慢速连接上进行流媒体/录制时，音频优先于视频数据。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同步

Red5 1.0 RC1引入了一种几乎可以正常工作的延迟写入机制

Red5 1.0 final、1.0.1和1.0.2的延迟写入机制存在完全缺陷，导致flv文件具有1个视频关键帧，在通过慢速连接录制时，其余仅为音频

录制的最佳Red5版本是修补版Red5 1.0.2，可在以下博客文章中找到：

它也将在下一个正式版本（1.0.3）中提供

---

我是该补丁的作者，我做了它来一次性修复Red5录音。它工作得很好。

您使用的是哪个版本的RED5？我们使用的是0.9版本。我在v0.9中遇到过此类问题。更改为v0.8以使其正常工作。您可以尝试使用v0.8。检查他们建议使用v0.8，[]链接3]（）的链接我同意，我们花了大量时间试图修复Red5下的录制后，不得不转移到wowza。