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• I have a problem with node js rtsp streaming server

  11 décembre 2022, par sangeun jo

  I made rtsp cctv streaming server with nodjs.

  


  But it is not stable.

  


  Some cctvs works well but others are not.

  


  First I thought rtsp url has its own problem, but it may not.
Because the url worked well in vlc player.

  


  I don't know what I'm missing.

  


  below is my whole code related cctv streaming.

  


  


  


  var express = require('express');
var router = express.Router();
var kill  = require('tree-kill');
var fs = require('fs');
var path = require('path');

var ffmpeg = require('fluent-ffmpeg');
var ffmpegInstaller = require('@ffmpeg-installer/ffmpeg');
ffmpeg.setFfmpegPath(ffmpegInstaller.path)

var streams = {};

//start cctv
router.post('/', (req, res) => {

  var cname = req.body.cname;
  var url = req.body.url;

  //if there is same cctv name
  if(streams[cname] != null) {
    res.status(409).send("duplicate name");
    return;
  };

  //create dir as given cctv name;
  mkdir(cname);

  stream = ffmpeg(url).addOptions([
    '-hls_time 5', 
    '-hls_list_size 10',
    '-hls_flags delete_segments',
    '-f hls' 
  ]).output('./public/video/' + cname + '/'  + cname + '.m3u8'); //save path

  console.log("Start cctv streaming");
  stream.on('error', function(err, stdout, stderr) {
    console.log("cctv has been stoped");
    console.log(err);
  });

  stream.run(); 

  streams[cname] = stream;
  res.status(201).send("OK");
});

//bring cctv pid by cctv name
router.get('/:cname', (req, res) => {
  var cname = req.params.cname;

  if(streams[cname] == null) {
    res.status(404).send("not found such a cctv");
    return;
  };

  var pid = streams[cname].ffmpegProc.pid;
  res.send({"pid": pid});
});


//stop cctv by pid 
router.delete('/:cname', async (req, res) => {
  var cname = req.params.cname;
  
  //no cctv
  if(streams[cname] == null) {
    res.status(404).send("not found such a cctv");
    return;
  };


  //del dir
  var filePath = './public/video/' +  cname;
  fs.rmdir(filePath, { recursive: true }, (err) => {
    if (err) {
      console.log(err)
    } else {
      console.log('dir is deleted.');
    }
  });

  //var pid = streams[cname].ffmpegProc.pid;
  streams[cname].kill();
  res.status(204).send("OK");
});

const mkdir = (name) => {
  var root = './public/video/';
  if(!fs.existsSync(root + name)){
    fs.mkdirSync(root + name);
  }
}

  


  


  



  And this is ts file save folder.
cctv1 dosen't work well but cctv2 works well.
(cctv1 started first but created less ts file than cctv2.)


  


• How to fix Ffmpeg cut video in nextjs ?

  27 juillet 2023, par Duy Tịnh

  I'm currently working on a Next.js project where I need to use ffmpeg to cut video files. However, I've encountered an error that occurs specifically when I navigate from one page to another using ffmpeg. Strangely, I don't encounter this error when I use an element or directly redirect to the page without involving ffmpeg.
The error message I'm receiving is as follows :

  


  ReferenceError: SharedArrayBuffer is not defined

Source
Views\EditVideo\index.tsx (264:4) @ async handleEditVideo

  262 | const ffmpegInstance = createFFmpeg({ log: true });
  263 | // error
> 264 | await ffmpegInstance.load();
      |    ^
  265 | // if (srcVideoEdit) {
  266 | //   ffmpegInstance.FS(
  267 | //     "writeFile",


  


  you can see more details at : https://i.stack.imgur.com/Z1OBx.png
This is my code in page have using ffmpeg :

  


    const handleEditVideo = async () => {&#xA;    const { createFFmpeg, fetchFile } = ffmpeg;&#xA;    const ffmpegInstance = createFFmpeg({ log: true });&#xA;    // error&#xA;    await ffmpegInstance.load();&#xA;  };&#xA;&#xA;  return (&#xA;    &lt;>&#xA;      <button>Test</button>&#xA;

  


  code the page navigation to it

  


   import { useRouter } from 'next/router'

export default function Upload() {
    const route = useRouter();
    const onOk = () => {
        route.push("/editvideo");
        setIsLoading(false);
    }
}


  


• Opencv VideoCapture not streaming RTSP link and returns "no frame !"

  6 septembre 2023, par Asadullah Naeem

  I am trying to stream my HikVision IP camera throough python. I am using cv2.VideoCapture("rtsp_link") which works fine on my Laptop but when I try to run the same python script with same Opencv and FFmpeg version it gives me following error :

  


  Error :

  


  [h264 @ 000002124c7f9a40] missing picture in access unit with size 47
[h264 @ 000002124c7f9a40] no frame!


  


  I have so far tried to run this script on 5 computer devices but it gives the same error. I am using the following python script and my Opencv version is 4.6.0.66 and ffmpeg version 2022-06-20-git-56419428a8-essentials_build-www.gyan.dev :

  


  Python Script :

  


  import cv2

# RTSP stream URL
rtsp_url = "rtsp://username:password@ip_address:port/Streaming/Channels/501"

# Open the RTSP stream
cap = cv2.VideoCapture(rtsp_url)

# Check if the stream was successfully opened
if not cap.isOpened():
    print("Failed to open RTSP stream.")
    exit()

# Read and display frames from the stream
while True:
    # Read a frame from the stream
    ret, frame = cap.read()

    # Check if the frame was successfully read
    if not ret:
        print("Failed to read frame from RTSP stream.")
        break

    # Display the frame
    cv2.imshow("RTSP Stream", frame)

    # Exit if 'q' is pressed
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

# Release the resources
cap.release()
cv2.destroyAllWindows()



  


  Update :

  


  Code runs on a laptop on both wifi and mobile internet (4G) but on other devices rtsp link is accessible only with mobile internet (4G).