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• multipart/x-mixed-replace - MJPG video stream does not close in

  18 janvier 2024, par karlcess

  I'm using Node.js and React.
In React I have a simple component that is displayed on the screen when a button is clicked. The component is as follows :

  


  import React from &#x27;react&#x27;&#xA;&#xA;const Image = () => {&#xA;  return <img src="http://stackoverflow.com/api/mjpgStream/stream01" style='max-width: 300px; max-height: 300px' />;&#xA;}&#xA;&#xA;

  


  Webpack redirects my requests (api=localhost:3456/mjpgStream/stream0).
In node I created an express server that when receiving the GET continuously sends JPEG images with multipart/x-mixed-replace. Below is the code :

  


  const cb: RequestHandler = (req, res) => {
  const url = req.url.toString().slice(1);
  res.writeHead(200, {
    "Content-Type": "multipart/x-mixed-replace;boundary='stream'",
    Connection: "keep-alive",
    Expires: "Fri, 27 May 1977 00:00:00 GMT",
    "Cache-Control": "no-cache, no-store, max-age=0, must-revalidate",
    Pragma: "no-cache",
  });
  let sub = PubSub.subscribe(url, function (msg: any, data: any) {
    res.write("--stream\r\n");
    res.write("Content-Type: image/jpeg\r\n");
    res.write("Content-Length: " + data.length + "\r\n");
    res.write("\r\n");
    res.write(data, "binary");
    res.write("\r\n");
  });

  req.on("close", () => {
    PubSub.unsubscribe(sub);
    res.end();
  });

  res.on("error", function (err) {
    console.error("Error in response:", err);
  });
};

router.get(/\/[a-z,0-9]*/, cb);


  


  The video stream is published in the topic with PubSub and is correctly displayed in the Image component.
The problem is that when I click the button to close the Image component from the web page, the close event is not captured on the express server side and the mjpg flow continues to exist. I can't understand why.

  


• avcodec/cbs : Mark init and close functions as av_cold

  1er juillet 2022, par Andreas Rheinhardt

  avcodec/cbs : Mark init and close functions as av_cold
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavcodec/cbs.c

• Close FFMPEG if connection with ipcam lost

  20 décembre 2023, par Gianluca

  this is my scrit that transmit a live camera rtsp stream to youtube rtmp stream.

  



  The Script before start verify if connection with camera is alive.

  



  The problem is during the process, if network connection lost ffmpeg remain in locked state.

  



  It's possibile to close ffmpeg or restart task if connection with camera lost ?

  



  :LOOP
timeout /t 10
ping 192.168.1.11
IF ERRORLEVEL 1 goto exit
IF ERRORLEVEL 0 goto START
:START

ffmpeg  -f lavfi -i anullsrc -rtsp_transport tcp -i rtsp://192.168.1.11:10554/tcp/av0_0 -tune zerolatency -vcodec libx264 -t 12:00:00 -pix_fmt + -c:v copy -c:a aac -strict experimental -f flv rtmp://a.rtmp.youtube.com/live2/(secret code)

goto LOOP