使用sprignboot 写一个直播的服务器代码

好的，下面是一个使用 Spring Boot 的直播服务器代码示例：

1. 添加依赖

在 pom.xml 文件中添加以下依赖：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-websocket</artifactId>
</dependency>
<dependency>
    <groupId>org.bytedeco</groupId>
    <artifactId>javacv</artifactId>
    <version>1.5.4</version>
</dependency>

2. 创建 WebSocket endpoint

创建一个 WebSocket endpoint，用于处理客户端连接和消息。

import org.bytedeco.javacv.*;
import org.springframework.stereotype.Component;
import org.springframework.web.socket.BinaryMessage;
import org.springframework.web.socket.CloseStatus;
import org.springframework.web.socket.WebSocketSession;
import org.springframework.web.socket.handler.BinaryWebSocketHandler;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;

@Component
public class LiveWebSocketHandler extends BinaryWebSocketHandler {
    private FFmpegFrameGrabber grabber;
    private FFmpegFrameRecorder recorder;
    private boolean isRecording = false;

    @Override
    public void afterConnectionEstablished(WebSocketSession session) throws Exception {
        System.out.println("Client connected: " + session.getId());
    }

    @Override
    public void afterConnectionClosed(WebSocketSession session, CloseStatus status) throws Exception {
        System.out.println("Client disconnected: " + session.getId());
        stopRecording();
    }

    @Override
    protected void handleBinaryMessage(WebSocketSession session, BinaryMessage message) throws Exception {
        if (!isRecording) {
            startRecording();
        }
        recorder.recordPacket(convertToPacket(message.getPayload()), grabber.getFormatContext().streams(0).codec());
    }

    private void startRecording() throws Exception {
        grabber = new FFmpegFrameGrabber("rtsp://your-stream-url");
        grabber.start();

        recorder = new FFmpegFrameRecorder("output.mp4", grabber.getImageWidth(), grabber.getImageHeight(), grabber.getAudioChannels());
        recorder.setFormat("mp4");
        recorder.setVideoCodec(avcodec.AV_CODEC_ID_H264);
        recorder.setAudioCodec(avcodec.AV_CODEC_ID_AAC);
        recorder.start();

        isRecording = true;
    }

    private void stopRecording() throws Exception {
        if (isRecording) {
            grabber.stop();
            recorder.stop();
            isRecording = false;
        }
    }

    private AVPacket convertToPacket(ByteBuffer buffer) throws IOException {
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        byte[] bytes = new byte[buffer.remaining()];
        buffer.get(bytes);
        outputStream.write(bytes);
        AVPacket packet = new AVPacket();
        avcodec.av_init_packet(packet);
        packet.data(outputStream.toByteArray());
        return packet;
    }
}

上面的代码使用 javacv 库来读取 RTSP 流并将其录制到 MP4 文件中。WebSocket 处理程序在收到客户端发送的二进制消息时，将其写入到录制器中。当客户端断开连接时，录制器将停止录制。

3. 配置 WebSocket endpoint

将 WebSocket endpoint 添加到 Spring Boot 应用程序中，通过配置类实现。

import org.springframework.context.annotation.Configuration;
import org.springframework.web.socket.config.annotation.EnableWebSocket;
import org.springframework.web.socket.config.annotation.WebSocketConfigurer;
import org.springframework.web.socket.config.annotation.WebSocketHandlerRegistry;

@Configuration
@EnableWebSocket
public class WebSocketConfig implements WebSocketConfigurer {
    private final LiveWebSocketHandler liveWebSocketHandler;

    public WebSocketConfig(LiveWebSocketHandler liveWebSocketHandler) {
        this.liveWebSocketHandler = liveWebSocketHandler;
    }

    @Override
    public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
        registry.addHandler(liveWebSocketHandler, "/live");
    }
}

上面的代码将 LiveWebSocketHandler 添加到 "/live" 路径下的 WebSocket 处理程序中。

4. 运行应用程序

使用以下命令运行 Spring Boot 应用程序：

./mvnw spring-boot:run

现在，您可以使用 WebSocket 客户端连接到 "/live" 路径并发送二进制消息，以将 RTSP 流录制到 MP4 文件中。

这只是一个简单的示例，您可以根据实际需求进行调整和扩展。