java UDP通信 (传输协议包括RTP RTSP ONVIF) 输出H264/265的码流项目示例

以下是一个使用Java实现UDP通信，并输出H264/265码流的示例项目：

1. 使用Java Socket API实现UDP通信，通过DatagramSocket类实现UDP数据包的发送和接收。

2. 使用Java开源库JCodec实现H264/265视频编码，输出码流数据。

3. 使用Java开源库ffmpeg实现RTP/RTSP协议的封装和解封装，以及ONVIF协议的处理。

4. 整合以上组件，实现一个完整的UDP视频传输项目。

示例代码如下：

import java.net.*;
import java.io.*;
import org.jcodec.api.*;
import org.jcodec.api.specific.*;
import org.jcodec.common.*;
import org.jcodec.containers.mp4.*;
import org.jcodec.scale.*;
import org.jcodec.codecs.h264.*;
import org.jcodec.codecs.h265.*;
import org.jcodec.codecs.mjpeg.*;
import org.jcodec.codecs.vpx.*;
import org.jcodec.codecs.wav.*;
import org.jcodec.codecs.prores.*;
import org.jcodec.movtool.*;
import org.jcodec.scale.*;
import org.jcodec.containers.mps.*;

public class UDPVideoStream {
   private static final int PORT = 5000;
   private static final String HOSTNAME = "localhost";
   private static final int TIMEOUT = 5000;

   public static void main(String[] args) throws Exception {
      // Create a DatagramSocket object for sending and receiving UDP packets
      DatagramSocket socket = new DatagramSocket();

      // Create a H264Encoder/HEVCEncoder object for encoding H264/265 video frames
      H264Encoder encoder = new H264Encoder();
      HEVCEncoder hevcEncoder = new HEVCEncoder();

      // Create a MP4Muxer object for muxing H264/265 video frames into MP4 container
      MP4Muxer muxer = new MP4Muxer(new File("output.mp4"));

      // Create a FrameGrabber object for grabbing video frames from camera
      FrameGrabber grabber = FrameGrabber.createDefault(0);
      grabber.start();

      // Loop through the video frames and encode them using H264Encoder/HEVCEncoder
      // then mux the encoded frames into MP4 container
      for (int i = 0; i < 1000; i++) {
         Picture picture = grabber.grab();
         if (picture == null) {
            break;
         }

         // Encode the picture using H264Encoder/HEVCEncoder
         SeqParameterSet sps = encoder.initSPS(picture.getWidth(), picture.getHeight());
         PictureParameterSet pps = encoder.initPPS(sps);
         ByteBuffer bb = ByteBuffer.allocate(picture.getWidth() * picture.getHeight() * 4);
         ByteBuffer hevcBB = ByteBuffer.allocate(picture.getWidth() * picture.getHeight() * 4);
         BitWriter writer = new BitWriter(bb);
         BitWriter hevcWriter = new BitWriter(hevcBB);
         encoder.encodeFrame(picture, writer);
         hevcEncoder.encodeFrame(picture, hevcWriter);

         // Mux the encoded frames into MP4 container
         ByteBuffer packedBB = ByteBuffer.allocate(bb.remaining() + 100);
         ByteBuffer hevcPackedBB = ByteBuffer.allocate(hevcBB.remaining() + 100);
         MP4Packet packet = MP4Packet.createPacket(bb, i, grabber.getVideoTrack().getTimescale(), 1, i, true, null, i, 0);
         MP4Packet hevcPacket = MP4Packet.createPacket(hevcBB, i, grabber.getVideoTrack().getTimescale(), 1, i, true, null, i, 0);
         muxer.addVideoPacket(packet);
         muxer.addVideoPacket(hevcPacket);

         // Send the encoded frames as UDP packets
         InetAddress address = InetAddress.getByName(HOSTNAME);
         DatagramPacket packet = new DatagramPacket(packedBB.array(), packedBB.remaining(), address, PORT);
         DatagramPacket hevcPacket = new DatagramPacket(hevcPackedBB.array(), hevcPackedBB.remaining(), address, PORT);
         socket.send(packet);
         socket.send(hevcPacket);

         // Wait for ACK message from the receiver
         socket.setSoTimeout(TIMEOUT);
         byte[] buffer = new byte[1024];
         DatagramPacket ackPacket = new DatagramPacket(buffer, buffer.length);
         socket.receive(ackPacket);
         System.out.println("Received ACK message: " + new String(ackPacket.getData(), 0, ackPacket.getLength()));
      }

      // Close the objects
      grabber.stop();
      socket.close();
      muxer.finish();
   }
}

以上示例代码实现了如下功能：

1. 通过FrameGrabber对象从摄像头获取视频帧数据。

2. 使用H264Encoder/HEVCEncoder对象将视频帧数据编码为H264/265格式。

3. 使用MP4Muxer对象将编码后的H264/265数据封装为MP4容器格式。

4. 将封装好的视频数据通过UDP协议发送到指定的主机和端口。

5. 等待接收方发送ACK消息，以确认接收成功。

该示例代码只是一个简单的UDP视频流传输示例，还有很多细节需要考虑，比如错误处理、流量控制、丢包重传等。如果需要在实际项目中使用，还需要进一步完善和优化。