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• Python vlc stream from outside NAT

  7 octobre 2020, par xKedar

  I'm trying to stream, using FFmpeg, my webcam and audio from PC1 to PC2 in another LAN.

  


  PC1 : Public IP address with port forwarding so I can reach it

  


  PC2 : In a different NAT from PC1

  


  I basically run a server on PC1 in order to acquire IP and port from PC2 and reply on the same address

  


      import socket

    localPort   = 1234
    bufferSize  = 1024

    UDPServerSocket = socket.socket(family=socket.AF_INET, type=socket.SOCK_DGRAM)
    UDPServerSocket.bind(("", localPort)) # Bind to address and port

    while(True):
        bytesAddressPair = UDPServerSocket.recvfrom(bufferSize)
        message = bytesAddressPair[0].decode("utf-8")
        address = bytesAddressPair[1]
        # Sending a reply to client
        UDPServerSocket.sendto(str.encode("Hello"), address)
        break

    UDPServerSocket.close()


  


  Then I try to send the stream with the same port number both for the server(localPort) and the client(the one I acquired from address)

  


      import re
    from threading import Thread
    from subprocess import Popen, PIPE

    def detect_devices():
            list_cmd = 'ffmpeg -list_devices true -f dshow -i dummy'.split()
            p = Popen(list_cmd, stderr=PIPE)
            flagcam = flagmic = False
            for line in iter(p.stderr.readline,''):
                if flagcam:
                    cam = re.search('".*"',line.decode(encoding='UTF-8')).group(0)
                    cam = cam if cam else ''
                    flagcam = False
                if flagmic:
                    mic = re.search('".*"',line.decode(encoding='UTF-8')).group(0)
                    mic = mic if mic else ''
                    flagmic = False
                elif 'DirectShow video devices'.encode(encoding='UTF-8') in line:
                    flagcam = True
                elif 'DirectShow audio devices'.encode(encoding='UTF-8') in line:
                    flagmic = True
                elif 'Immediate exit requested'.encode(encoding='UTF-8') in line:
                    break
            return cam, mic   


    class ffmpegThread (Thread):
        def __init__(self, address):
            Thread.__init__(self)
            self.address = address

        def run(self):
            cam, mic = detect_devices()
            command = 'ffmpeg -f dshow -i video='+cam+':audio='+mic+' -profile:v high -pix_fmt yuvj420p -level:v 4.1 -preset ultrafast -tune zerolatency -vcodec libx264 -r 10 -b:v 512k -s 240x160 -acodec aac -ac 2 -ab 32k -ar 44100 -f mpegts -flush_packets 0 -t 40 udp://'+self.address+'?pkt_size=1316?localport='+str(localPort)
            p = Popen(command , stderr=PIPE)
            for line in iter(p.stderr.readline,''):
                if len(line) <5: break
            p.terminate()

    thread1 = ffmpegThread(address[0]+":"+str(address[1]))
    thread1.start()


  


  While on the other side(PC2) I have :

  


      from threading import Thread
    import tkinter as tk
    import vlc

    class myframe(tk.Frame):
        def __init__(self, width=240, height=160):
            self.root = tk.Tk()
            super(myframe, self).__init__(self.root)
            self.root.geometry("%dx%d" % (width, height))
            self.root.wm_attributes("-topmost", 1)
            self.grid()
            self.frame = tk.Frame(self, width=240, height=160)
            self.frame.configure(bg="black")
            self.frame.grid(row=0, column=0, columnspan=2)
            self.play()
            self.root.mainloop()

        def play(self):
            self.player = vlc.Instance().media_player_new()
            self.player.set_mrl('udp://@0.0.0.0:5000')
            self.player.set_hwnd(self.frame.winfo_id())
            self.player.play()

    class guiThread (Thread):
        def __init__(self, nome):
            Thread.__init__(self)
            self.nome = nome

        def run(self):
            app = myframe()


  


  and :

  


      import socket

    msgFromClient       = "Hello UDP Server"
    bytesToSend         = str.encode(msgFromClient)
    serverAddressPort   = ("MYglobal_IPaddress", 1234)
    bufferSize          = 1024
    localPort   = 5000

    # Create a UDP socket at client side
    UDPClientSocket = socket.socket(family=socket.AF_INET, type=socket.SOCK_DGRAM) 
    UDPClientSocket.bind(("", localPort))

    UDPClientSocket.sendto(bytesToSend, serverAddressPort)

    msgFromServer = UDPClientSocket.recvfrom(bufferSize)
    msg = msgFromServer[0].decode("utf-8")
    print(msg)
    UDPClientSocket.close()
    gui = guiThread("ThreadGUI")
    gui.start()


  


  Where I basically try to reach the server both to send my IP:Port and to punch a hole in the NAT in order to be able to get the packages sent from PC1 despite being behind a NAT.

  


  I think it is not working because I can not reach PC2 but I really can not figure out how to fix that because I was expecting that the first part, where I reach PC1 from PC2 was enough in order to establish a connection

  


• Révision 24489 : [Salvatore] [source : ecrire] Export depuis https://trad.spip.net de la langue de

  4 février 2020, par salvatore@rezo.net

  Credits : klaus++ <klaus@spip.de>

• How do I stop ffmpeg from spamming itself when I auto restart ?

  15 décembre 2019, par billy61300

  const fs = require("fs");
  
  const express = require("express");
  
  const app = express();
  
  const path = require("path");
  
  const ffmpeg = require("fluent-ffmpeg");
  
  const md5 = require("md5");
  
  const readline = require("readline");
  
  const formidable = require("formidable");
  
  
  
  const dir = "Custom/Dir";
  
  const thumb = __dirname + "/thumb";
  
  const ph = __dirname + "/placeholder";
  
  
  
  app.use("/serve", express.static(dir));
  
  app.use("/thumb", express.static(thumb));
  
  app.use("/ph", express.static(ph));
  
  
  
  const list = [];
  
  const listThumb = [];
  
  
  
  process.on("uncaughtException", (err) => {
  
      console.log("Caught Exception: " + err);
  
  });
  
  
  
  let passwords = fs.readFileSync("passwords.txt").toString().split("\n");
  
  
  
  app.get("/", (req, res) => {
  
      res.sendFile(__dirname + "/index.html")
  
  });
  
  
  
  app.get("/upload", (req, res) => {
  
      res.sendFile(__dirname + "/upload.html");
  
  });
  
  
  
  app.post("/uploadFile", (req, res) => {
  
      let form = new formidable.IncomingForm();
  
      form.parse(req, (err, fields, files) => {
  
          if (passwords.includes(md5(fields.password))) {
  
              fs.readFile(files.filetoupload.path, (err, data) => {
  
                  let newPath = dir + "/" + files.filetoupload.name;
  
                  if (!fs.existsSync(newPath)) {
  
                      fs.writeFile(newPath, data, (err) => {
  
                          res.writeHead(200, {"Content-Type": "text/html"});
  
                          res.write("<h1>File Uploaded</h1>");
  
                          res.end();
  
                      });
  
                  } else {
  
                      res.writeHead(200, {"Content-Type": "text/html"});
  
                      res.write("<h1>File already exists. Upload with a different name please.</h1>");
  
                      res.end();
  
                  }
  
              });
  
          }
  
      });
  
  });
  
  
  
  fs.readdir(dir, (err, files) => {
  
      if (err) {
  
          throw err;
  
      } else {
  
          let i = 0;
  
          files.forEach((file) => {
  
              list[i] = path.basename(file);
  
              if (!fs.existsSync(__dirname + "\\thumb\\" + list[i] + ".png")) {
  
                  console.log("Generating: " + list[i] + ".png");
  
                  let proc = new ffmpeg({source: dir + "/" + file, nolog: true});
  
                  proc.setFfmpegPath(__dirname + "\\ffmpeg.exe");
  
                  proc.screenshots({
  
                      timestamps: [0.0],
  
                      filename: list[i] + ".png",
  
                      folder: __dirname + "\\thumb\\",
  
                      size: "100x100"
  
                  });
  
              }
  
              i++;
  
          });
  
          let serveDoc = "";
  
          for (let j = 0; j &lt; list.length; j++) {
  
              if (path.extname(list[j]).toLowerCase() !== ".jpg" &amp;&amp; path.extname(list[j]).toLowerCase() !== ".jpeg" &amp;&amp; path.extname(list[j]).toLowerCase() !== ".png") {
  
                  if (path.extname(list[j]).toLowerCase() == ".mp3" || path.extname(list[j]).toLowerCase() == ".wav") {
  
                      serveDoc += "<a href="http://stackoverflow.com/feeds/tag/address&#034; + list[j] + &#034;">" + "<img width='100' height='100' src="http://stackoverflow.com/feeds/tag/address" />" + "</a> ";;
  
                  }/* else if (path.extname(list[j]).toLowerCase() == ".webm") {
  
                      serveDoc += "<a href="http://stackoverflow.com/feeds/tag/address&#034; + list[j] + &#034;">" + "<img width='100' height='100' src="http://stackoverflow.com/feeds/tag/address" />" + "</a> ";;
  
                  }*/ else {
  
                      serveDoc += "<a href="http://stackoverflow.com/feeds/tag/address&#034; + list[j] + &#034;">" + "<img width='100' height='100' src="http://stackoverflow.com/feeds/tag/address&#034; + list[j] + &#034;.png" />" + "</a> ";
  
                  }
  
              } else {
  
                  serveDoc += "<a href="http://stackoverflow.com/feeds/tag/address&#034; + list[j] + &#034;">" + "<img width='100' height='100' src="http://stackoverflow.com/feeds/tag/address&#034; + list[j] + &#034;" />" + "</a> ";
  
              }
  
          }
  
          serveDoc += "";
  
          fs.writeFile("index.html", serveDoc, (err) => {
  
              if (err) throw err;
  
          });
  
      }
  
  });
  
  
  
  setTimeout(() => {
  
      process.exit(0);
  
  }, 1000 * 60 * 30);
  
  
  
  app.listen(80, (err) => {
  
      if (err) {
  
          throw err;
  
      } else {
  
          console.log("Listening on port 80.");
  
      }
  
  });

  Issue is that the program needs to be restarted every X minutes so that the list of media will update on it’s own. However, upon a restart, ffmpeg goes crazy and starts to spam a batch window under it’s name repeatedly over and over again without stopping. The only way out of it is to restart my computer.

  I’ve tried to use PM2, Forever, Supervisor. Nodemon afaik won’t auto restart.