java UDP通信 (传输协议包括RTP RTSP ONVIF) 输出H264/265的码流代码示例

以下是使用Java进行UDP通信，并输出H264/265的码流的示例代码：

1. UDP通信代码：

import java.io.IOException;
import java.net.*;

public class UdpClient {
    private DatagramSocket socket;
    private InetAddress address;

    public UdpClient(String ipAddress, int port) throws SocketException, UnknownHostException {
        socket = new DatagramSocket();
        address = InetAddress.getByName(ipAddress);
    }

    public void send(byte[] data) throws IOException {
        DatagramPacket packet = new DatagramPacket(data, data.length, address, socket.getPort());
        socket.send(packet);
    }

    public void close() {
        socket.close();
    }
}

2. H264/265编码代码：

import com.sun.media.jfxmedia.logging.Logger;
import org.bytedeco.ffmpeg.avcodec.AVPacket;
import org.bytedeco.ffmpeg.global.avcodec;
import org.bytedeco.ffmpeg.global.avutil;

import java.nio.ByteBuffer;

public class Encoder {
    private AVPacket avPacket;
    private ByteBuffer buffer;
    private int bufferSize;
    private long pts;
    private int frameCount;
    private int codecId;

    public Encoder(int codecId, int width, int height) {
        this.codecId = codecId;
        avutil.avcodec_register_all();
        avPacket = avcodec.av_packet_alloc();
        avcodec.AVCodec codec = avcodec.avcodec_find_encoder(codecId);
        if (codec == null) {
            Logger.logMsg(0, "Could not find encoder for codec id " + codecId);
            System.exit(1);
        }
        avcodec.AVCodecContext codecContext = avcodec.avcodec_alloc_context3(codec);
        if (codecContext == null) {
            Logger.logMsg(0, "Could not allocate codec context");
            System.exit(1);
        }
        codecContext.width(width);
        codecContext.height(height);
        codecContext.pix_fmt(avcodec.AV_PIX_FMT_YUV420P);
        codecContext.time_base().num(1).den(25);
        codecContext.flags(avcodec.AV_CODEC_FLAG_GLOBAL_HEADER);
        int ret = avcodec.avcodec_open2(codecContext, codec, null);
        if (ret < 0) {
            Logger.logMsg(0, "Could not open codec");
            System.exit(1);
        }
        bufferSize = avutil.av_image_get_buffer_size(avcodec.AV_PIX_FMT_YUV420P, width, height, 1);
        buffer = ByteBuffer.allocate(bufferSize);
    }

    public void encode(byte[] inputData) {
        int ret = avcodec.avcodec_send_frame(codecContext, frame);
        if (ret < 0) {
            Logger.logMsg(0, "Error sending frame to codec");
            System.exit(1);
        }
        while (ret >= 0) {
            ret = avcodec.avcodec_receive_packet(codecContext, avPacket);
            if (ret == avutil.AVERROR_EAGAIN() || ret == avutil.AVERROR_EOF) {
                break;
            } else if (ret < 0) {
                Logger.logMsg(0, "Error receiving packet from codec");
                System.exit(1);
            }
            avPacket.pts(pts);
            pts += 1;
            avPacket.dts(avPacket.pts());
            avPacket.stream_index(0);
            byte[] outputData = new byte[avPacket.size()];
            avPacket.data().get(outputData);
            // 发送outputData到UDP服务器
            udpClient.send(outputData);
            avcodec.av_packet_unref(avPacket);
        }
        frameCount += 1;
    }

    public void close() {
        int ret = avcodec.avcodec_send_frame(codecContext, null);
        if (ret < 0) {
            Logger.logMsg(0, "Error sending null frame to codec");
            System.exit(1);
        }
        while (ret >= 0) {
            ret = avcodec.avcodec_receive_packet(codecContext, avPacket);
            if (ret == avutil.AVERROR_EAGAIN() || ret == avutil.AVERROR_EOF) {
                break;
            } else if (ret < 0) {
                Logger.logMsg(0, "Error receiving packet from codec");
                System.exit(1);
            }
            avPacket.pts(pts);
            pts += 1;
            avPacket.dts(avPacket.pts());
            avPacket.stream_index(0);
            byte[] outputData = new byte[avPacket.size()];
            avPacket.data().get(outputData);
            // 发送outputData到UDP服务器
            udpClient.send(outputData);
            avcodec.av_packet_unref(avPacket);
        }
        avcodec.avcodec_close(codecContext);
        avcodec.avcodec_free_context(codecContext);
        avcodec.av_packet_free(avPacket);
    }
}

请注意，上述代码是基于FFmpeg库编写的，因此您需要在项目中添加FFmpeg库的相关依赖项。