java将h264转flv实现方法并推送给前端播放

要将H264转换为FLV并推送到前端进行播放，您可以使用以下步骤：

1. 使用Java的FFmpeg库将H264视频转换为FLV格式。您可以使用Java的FFmpeg库，例如 Xuggler，jffmpeg或JavaCV，来实现此目的。

2. 在Java中使用Socket将FLV流发送到前端。您可以通过Socket将FLV流发送到前端的Web客户端。

3. 在前端使用HTML5的Video标签播放FLV流。在前端，您可以使用HTML5的Video标签来播放FLV流。您可以将FLV流的URL传递给Video标签，并在浏览器中进行播放。

以下是一个示例代码，演示如何使用Xuggler库将H264转换为FLV并将其推送到前端进行播放：

import java.io.File;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import com.xuggle.mediatool.IMediaReader;
import com.xuggle.mediatool.IMediaWriter;
import com.xuggle.mediatool.ToolFactory;
import com.xuggle.xuggler.IPixelFormat;
import com.xuggle.xuggler.IStreamCoder;

public class H264toFLV {

   private static final int VIDEO_STREAM_INDEX = 0;
   private static final int FLV_PORT = 9999;

   public static void main(String[] args) throws IOException {
      // Create a server socket to listen for incoming connections on the specified port
      ServerSocket serverSocket = new ServerSocket(FLV_PORT);

      // Open the H264 video file
      File h264File = new File("input.h264");
      IMediaReader mediaReader = ToolFactory.makeReader(h264File.getAbsolutePath());

      // Create a video stream coder for the H264 video
      IStreamCoder videoCoder = mediaReader.getStream(VIDEO_STREAM_INDEX).getStreamCoder();
      videoCoder.setPixelType(IPixelFormat.Type.YUV420P);

      // Create an FLV output file and a stream coder for the FLV video
      IMediaWriter mediaWriter = ToolFactory.makeWriter("output.flv");
      mediaWriter.addVideoStream(VIDEO_STREAM_INDEX, 0, videoCoder.getWidth(), videoCoder.getHeight());
      IStreamCoder flvVideoCoder = mediaWriter.getContainer().getStream(VIDEO_STREAM_INDEX).getStreamCoder();
      flvVideoCoder.setPixelType(IPixelFormat.Type.YUV420P);

      long startTime = System.currentTimeMillis();

      // Read the H264 video frames and write them to the FLV output file
      while (mediaReader.readPacket() == null) {
         mediaWriter.encodeVideo(VIDEO_STREAM_INDEX, mediaReader.getBuffer(), System.currentTimeMillis() - startTime);
      }

      // Close the H264 video file and the FLV output file
      mediaReader.close();
      mediaWriter.close();

      // Wait for incoming connections from clients and send them the FLV stream
      while (true) {
         Socket clientSocket = serverSocket.accept();
         FLVStreamer flvStreamer = new FLVStreamer(clientSocket, "output.flv");
         flvStreamer.start();
      }
   }

   private static class FLVStreamer extends Thread {

      private final Socket clientSocket;
      private final String flvFile;

      public FLVStreamer(Socket clientSocket, String flvFile) {
         this.clientSocket = clientSocket;
         this.flvFile = flvFile;
      }

      @Override
      public void run() {
         try {
            // Open the FLV output file
            File flvOutputFile = new File(flvFile);

            // Send the FLV stream to the client
            FLVStreamSender flvStreamSender = new FLVStreamSender(clientSocket.getOutputStream(), flvOutputFile);
            flvStreamSender.sendStream();
         } catch (IOException e) {
            e.printStackTrace();
         }
      }
   }
}

这个示例代码使用了Xuggler库来将H264视频转换为FLV格式，然后使用Socket将FLV流推送到前端进行播放。请注意，您需要将Xuggler库添加到您的Java项目中，以便使用它来处理媒体文件。