利用ffmpeg+Nginx将摄像头的rtsp视频流推流直播

一、安装nginx 和 nginx-rtmp
1、安装依赖

	sudo apt-get install build-essential libpcre3 libpcre3-dev libssl-dev

2、下载nginx与nginx-rtmp

wget http://nginx.org/download/nginx-1.17.6.tar.gz
wget https://github.com/arut/nginx-rtmp-module/archive/master.zip
sudo tar -zxvf nginx-1.17.6.tar.gz -C /opt
sudo unzip master.zip -d /opt/nginx-1.17.6

3、编译

cd nginx-1.17.6
./configure --with-http_ssl_module --add-module=./nginx-rtmp-module-master

4、安装

make
sudo make install

5、安装启动脚本

sudo wget https://raw.github.com/JasonGiedymin/nginx-init-ubuntu/master/nginx -O /etc/init.d/nginx
sudo chmod +x /etc/init.d/nginx
sudo update-rc.d nginx defaults

6、启动与停止nginx服务,生成配置文件

sudo service nginx start
sudo service nginx stop

二、安装FFmpeg

https://blog.youkuaiyun.com/sheqianweilong/article/details/102623552

三、配置 nginx-rtmp 服务器

vim /usr/local/nginx/conf/nginx.conf
在末尾添加如下 配置:
rtmp {    
    server {    
        listen 1935;  #监听的端口  
        chunk_size 4000;    
        application hls {  #rtmp推流请求路径  
            live on;    
            hls on;    
            hls_path /usr/local/nginx/html/hls;    
            hls_fragment 5s;    
        }    
    }    
} 

四、重启nginx服务器

sudo service nginx restart

五、检测

netstat -an | grep 1935
出现以下信息代表则代表启动nginx/rtmp成功
netstat -an | grep 1935
tcp        0      0 0.0.0.0:1935            0.0.0.0:*               LISTEN 

六、推流

ffmpeg -i "rtsp://192.168.1.108/live0" -vcodec copy -acodec aac -ar 44100 -strict -2 -ac 1 -f flv -s 4000x3000 -q 10 -f flv "rtmp://127.0.0.1:1935/hls/live"

七、读取
可以使用ffplay直接播放:

ffplay rtmp://127.0.0.1:1935/hls/live

python opencv 也可以正常拉取：

import cv2
cap = cv2.VideoCapture("rtmp://127.0.0.1:1935/hls/live")
ret,frame = cap.read()
while ret:
    cv2.imshow("frame",frame)
     ret,frame = cap.read()
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break
cv2.destroyAllWindows()

参考：https://blog.youkuaiyun.com/IOT_SHUN/article/details/79684856
参考：https://github.com/arut/nginx-rtmp-module/wiki/Directives