package com.ruoyi.system.util;
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import org.bytedeco.ffmpeg.global.avcodec;
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import org.bytedeco.ffmpeg.global.avutil;
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import org.bytedeco.javacv.*;
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import java.util.Map;
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import java.util.concurrent.ConcurrentHashMap;
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/**
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* 音视频推流拉流工具类
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* 参考资料：https://juejin.cn/post/7311230172237561866
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* @author zhibing.pu
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* @Date 2025/4/8 16:03
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*/
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public class JavaCVStreamUtil {
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private static Map<Integer, FFmpegFrameGrabber> grabberMap = new ConcurrentHashMap<>();
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private static Map<Integer, FFmpegFrameRecorder> frameRecorderMap = new ConcurrentHashMap<>();
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private static Map<Integer, Boolean> statusMap = new ConcurrentHashMap<>();
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/**
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* 视频拉流和推流
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*/
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public static void push_flv(String inputUrl, String outputUrl, Integer deviceNumber){
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// OpenCVFrameGrabber grabber = null;
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FFmpegFrameGrabber grabber = null;
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FFmpegFrameRecorder recorder = null;
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try {
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//关闭上一个没有正确关闭的流
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FFmpegFrameGrabber fFmpegFrameGrabber = grabberMap.get(deviceNumber);
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if(null != fFmpegFrameGrabber){
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fFmpegFrameGrabber.close();
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}
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FFmpegFrameRecorder fFmpegFrameRecorder = frameRecorderMap.get(deviceNumber);
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if(null != fFmpegFrameRecorder){
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fFmpegFrameRecorder.close();
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}
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//设置FFmpeg日志级别
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avutil.av_log_set_level(avutil.AV_LOG_INFO);
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FFmpegLogCallback.set();
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//视频抓帧
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grabber = new FFmpegFrameGrabber(inputUrl);
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grabber.setOption("rtsp_transport", "tcp");
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// 正确设置超时时间
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grabber.setOption("timeout", "120000");
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grabber.start();
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grabberMap.put(deviceNumber, grabber);
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// grabber = new OpenCVFrameGrabber(0);
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// grabber.start();
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//录制视频，推送到流媒体服务器（nginx）
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recorder = new FFmpegFrameRecorder(outputUrl, grabber.getImageWidth(), grabber.getImageHeight());
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recorder.setFormat("flv");
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// 设置视频比特率
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recorder.setVideoBitrate(grabber.getVideoBitrate());
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// // 设置帧率
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// recorder.setFrameRate(grabber.getVideoFrameRate());
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// // 设置关键帧间隔
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// recorder.setGopSize((int) grabber.getVideoFrameRate());
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// CRF 是一种用于控制视频/音频质量的参数，它允许在保持目标质量的同时动态地调整比特率。较低的CRF值表示更高的质量，但也可能导致较大的文件大小
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recorder.setAudioOption("crf", "23");
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//设置音频编码为AAC
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// if (grabber.getAudioChannels() > 0) {
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recorder.setAudioChannels(grabber.getAudioChannels());
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recorder.setAudioBitrate(grabber.getAudioBitrate());
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recorder.setAudioCodec(avcodec.AV_CODEC_ID_AAC);
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// }
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recorder.setVideoCodec(avcodec.AV_CODEC_ID_H264);
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//将解码后的帧记录到输出文件中
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//recorder.start通常用于处理已经解码成图像的视频数据
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recorder.start();
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Frame frame;
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while ((frame = grabber.grab()) != null) {
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recorder.record(frame);
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}
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} catch (FrameGrabber.Exception | FrameRecorder.Exception e) {
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e.printStackTrace();
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}finally {
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try {
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statusMap.put(deviceNumber, false);
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if(null != grabber){
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grabber.stop();
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}
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if(null != recorder){
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recorder.stop();
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}
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}catch (Exception e){
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e.printStackTrace();
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}
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}
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}
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/**
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* 视频拉流和推流
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*/
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public static void push_hls(String inputUrl, String outputUrl, Integer deviceNumber){
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OpenCVFrameGrabber grabber = null;
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// FFmpegFrameGrabber grabber = null;
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FFmpegFrameRecorder recorder = null;
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// outputUrl = "http://192.168.110.85:80/test.m3u8";
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try {
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//关闭上一个没有正确关闭的流
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FFmpegFrameGrabber fFmpegFrameGrabber = grabberMap.get(deviceNumber);
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if(null != fFmpegFrameGrabber){
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fFmpegFrameGrabber.close();
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}
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FFmpegFrameRecorder fFmpegFrameRecorder = frameRecorderMap.get(deviceNumber);
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if(null != fFmpegFrameRecorder){
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fFmpegFrameRecorder.close();
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}
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//设置FFmpeg日志级别
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avutil.av_log_set_level(avutil.AV_LOG_INFO);
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FFmpegLogCallback.set();
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//视频抓帧
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// grabber = new FFmpegFrameGrabber(inputUrl);
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// grabber.setOption("rtsp_transport", "tcp");
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// // 正确设置超时时间
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// grabber.setOption("timeout", "30000");
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// grabber.start();
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// grabberMap.put(deviceNumber, grabber);
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grabber = new OpenCVFrameGrabber(0);
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grabber.start();
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//录制视频，推送到流媒体服务器（nginx）
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recorder = new FFmpegFrameRecorder(outputUrl, grabber.getImageWidth(), grabber.getImageHeight());
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recorder.setFormat("hls");
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// 设置视频比特率
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recorder.setVideoBitrate(grabber.getVideoBitrate());
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// 设置帧率
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// recorder.setFrameRate(grabber.getVideoFrameRate());
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// // 设置关键帧间隔
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// recorder.setGopSize((int) grabber.getVideoFrameRate());
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// 设置HLS切片参数
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//将每个切片时长设置为10秒
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recorder.setOption("hls_time", "15");
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//设置切片数大小
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recorder.setOption("hls_list_size", "20");
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//设置切片循环次数为50
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recorder.setOption("hls_wrap", "20");
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//每次切片完成后，都会删除之前的切片文件。如果不设置或设置为其他值，则不会删除之前的切片文件。
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recorder.setOption("hls_flags", "delete_segments");
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//在使用 H.264 编码时，通常要求输入的像素格式为 YUV420P。如果输入的像素格式不匹配，就可能导致 avcodec_send_frame() 错误
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recorder.setPixelFormat(avutil.AV_PIX_FMT_YUV420P);
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//CRF 是一种用于控制视频/音频质量的参数，它允许在保持目标质量的同时动态地调整比特率。较低的CRF值表示更高的质量，但也可能导致较大的文件大小
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recorder.setAudioOption("crf", "23");
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//设置音频编码为AAC
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if (grabber.getAudioChannels() > 0) {
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recorder.setAudioChannels(grabber.getAudioChannels());
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recorder.setAudioBitrate(grabber.getAudioBitrate());
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recorder.setAudioCodec(avcodec.AV_CODEC_ID_AAC);
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}
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recorder.setVideoCodec(avcodec.AV_CODEC_ID_H264);
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//设置音频编码为AAC
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if (grabber.getAudioChannels() > 0) {
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recorder.setAudioChannels(grabber.getAudioChannels());
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recorder.setAudioBitrate(grabber.getAudioBitrate());
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recorder.setAudioCodec(avcodec.AV_CODEC_ID_AAC);
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}
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//开始录制视频
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recorder.start();
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frameRecorderMap.put(deviceNumber, recorder);
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//设置状态为开始
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statusMap.put(deviceNumber, true);
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Frame frame;
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while ((frame = grabber.grab()) != null) {
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recorder.record(frame);
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//判断状态为停止，则结束此线程任务
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if(!statusMap.get(deviceNumber)){
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break;
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}
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}
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} catch (FrameGrabber.Exception | FrameRecorder.Exception e) {
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e.printStackTrace();
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}finally {
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try {
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statusMap.put(deviceNumber, false);
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if(null != grabber){
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grabber.stop();
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}
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if(null != recorder){
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recorder.stop();
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}
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}catch (Exception e){
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e.printStackTrace();
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}
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}
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}
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/**
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* 关闭推流和拉流进程
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* @param deviceNumber
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*/
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public static void close(Integer deviceNumber){
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//设置状态为停止
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statusMap.put(deviceNumber, false);
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FFmpegFrameGrabber fFmpegFrameGrabber = null;
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FFmpegFrameRecorder fFmpegFrameRecorder = null;
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try {
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fFmpegFrameGrabber = grabberMap.get(deviceNumber);
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if(null != fFmpegFrameGrabber){
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fFmpegFrameGrabber.close();
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}
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fFmpegFrameRecorder = frameRecorderMap.get(deviceNumber);
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if(null != fFmpegFrameRecorder){
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fFmpegFrameRecorder.close();
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}
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}catch (Exception e){
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e.printStackTrace();
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}finally {
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try {
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fFmpegFrameGrabber = grabberMap.get(deviceNumber);
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if(null != fFmpegFrameGrabber){
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fFmpegFrameGrabber.close();
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}
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fFmpegFrameRecorder = frameRecorderMap.get(deviceNumber);
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if(null != fFmpegFrameRecorder){
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fFmpegFrameRecorder.close();
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}
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}catch (Exception e){
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e.printStackTrace();
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}
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}
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}
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}
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