ffmpeg实现rtsp转rtmp

水深无声 2023-10-05 09:22 68阅读 0赞

首先，说一下ffmpeg实现rtsp转rtmp需要的条件：

（1）ffmpeg包: [https://github.com/xueying123-cat/ffmpeg][https_github.com_xueying123-cat_ffmpeg]

（2）nginx-rtmp：[https://github.com/xueying123-cat/nginx-rtmp.git][https_github.com_xueying123-cat_nginx-rtmp.git]

（3）转码服务，[https://github.com/xueying123-cat/camera.git][https_github.com_xueying123-cat_camera.git],这个代码对于多个转流同时执行可能存在线程不能正常结束的问题，大家有好的建议可以留言赐教

思路：转码服务将SVR中的rtsp流通过ffmpeg包转化为rtmp包，然后nginx-rtmp支持rtmp流播放。

ffmpeg转流命令：

ffmpeg -re  -rtsp_transport tcp -i "rtsp://username:password@serverIp/id=chnid" -f flv -vcodec copy -acodec copy -f flv -s 1280x720 -q 10 "rtmp://nginx_rtmp_ip:nginx_rtmp_ip/live/test"

nginx-rtmp的nginx-conf配置：

worker_processes  1;
    
    error_log  logs/error.log info;
    
    events {
        worker_connections  1024;
    }
    
    rtmp {
        server {
            listen 1935;
            chunk_size 4096;   #//数据传输块的大小
            application live {
                live on;
            }
    		application vod {
                play D:\lib; #//视频文件存放位置。
            }
            application hls {
                live on;
                hls on;  
                hls_path D:\lib;  
                hls_fragment 8s;  
            }
        }
    }
    
    http {
        server {
            listen      8083;
    		···
        }
    }

现在说一下转码服务如何实现将rtsp流转化为rtmp流

//（1）获取当前转流命令，配置在常量类里
    String command = ffmpegCommand.RTSP_TO_RTMP.getValue()
            .replace("rtspUrl", rtsp)
            .replace("rtmpUrl", rtmp);
    
    //（2）执行cmd转流命令
    Runtime.getRuntime().exec(commond)
    
    //（3）将当前转流功能线程里执行，维护当前转流功能不被其他请求打扰
    private static ThreadLocal<BufferedReader> br = ThreadLocal.<BufferedReader>withInitial(() -> null);
    private static ThreadLocal<String> threadId = ThreadLocal.<String>withInitial(() -> null);    //定义线程内变量
    private static ThreadLocal<Boolean> cameraStatus = ThreadLocal.<Boolean>withInitial(() -> false);
    
    //在本机创建一个进程
    Process process = Runtime.getRuntime().exec(command);
    
    new Thread(() -> {
        cameraStatus.set(true);
        InputStream is = process.getErrorStream();
        BufferedReader reader = new BufferedReader(new InputStreamReader(is));
        br.set(reader);
        threadId.set(id);
    
        while (cameraStatus.get()) {
            //对流操作
            ···
            
            if (Thread.currentThread().isInterrupted()) {
                cameraStatus.set(false);
                closeResources(is, reader);
            }
        }
    
    }
    //（4）结束转流时，中断线程，并向当前线程中发送ffmpeg的停止命令q指令终止process的进程，停止当前线程
        thread.interrupt();
        OutputStream out = process.getOutputStream();
        Writer w = new OutputStreamWriter(out);
        try {
            w.write("q");
            w.flush();
        } catch (IOException e) {
            throw new CameraException("IOException==stop=>", e.getMessage());
        } finally {
            try {
                if (w != null) {
                    w.close();
                }
            } catch (IOException e) {
                throw new CameraException("IOException==closew=>", e.getMessage());
            }
        }

测试结果：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0NBVF9jd2Rz_size_16_color_FFFFFF_t_70][]

图像：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0NBVF9jd2Rz_size_16_color_FFFFFF_t_70 1][]

写的比较粗糙，如果哪里有不明白，欢迎留言

[https_github.com_xueying123-cat_ffmpeg]: https://github.com/xueying123-cat/ffmpeg
[https_github.com_xueying123-cat_nginx-rtmp.git]: https://github.com/xueying123-cat/nginx-rtmp.git
[https_github.com_xueying123-cat_camera.git]: https://github.com/xueying123-cat/camera.git
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0NBVF9jd2Rz_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200831160322239.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0NBVF9jd2Rz,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0NBVF9jd2Rz_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200831160601637.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0NBVF9jd2Rz,size_16,color_FFFFFF,t_70