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• Python ThreadedTCPServer : "Name or service not known"

  11 avril 2014, par Hal

  I was developing a ThreadedTCPServer to communicate with a PHP application also residing in this same machine. This is suppose to receive requests from this PHP app and to convert some videos locally using ffmpeg.

  Here's the code :

  # -*- coding: utf-8 -*- 
  
  import os
  
  import socket
  
  import threading
  
  import logging.config
  
  import SocketServer, time
  
  from queuev2 import QueueServer
  
  
  
  logging.basicConfig(format='[%(asctime)s.%(msecs).03d] %(message)s', datefmt='%Y-%m-%d %H:%M:%S', filename=os.path.join(os.path.dirname(os.path.realpath(__file__)), 'converter.log'), level=logging.INFO)
  
  
  
  class ThreadedTCPRequestHandler(SocketServer.BaseRequestHandler):
  
  
  
      def handle(self):
  
          data = self.request.recv(1024)
  
          cur_thread = threading.current_thread()
  
          response = "{}: {}".format(cur_thread.name, data)
  
          videoPool.add(data)
  
          print "Output! %s" % data
  
          self.request.sendall(response)
  
  
  
  class ThreadedTCPServer(SocketServer.ThreadingMixIn, SocketServer.TCPServer):
  
      pass
  
  
  
  if __name__ == "__main__":
  
  
  
      logging.info("Initializing...")
  
      videoPool = QueueServer()
  
      HOST, PORT = "localhost", 6666
  
  
  
      server = ThreadedTCPServer((HOST, PORT), ThreadedTCPRequestHandler)
  
      ip, port = server.server_address
  
  
  
      # Start a thread with the server -- that thread will then start one
  
      # more thread for each request
  
      server_thread = threading.Thread(target=server.serve_forever)
  
  
  
      # Exit the server thread when the main thread terminates
  
      server_thread.daemon = True
  
      server_thread.start()
  
  
  
      print("Server loop running in thread: %s" % server_thread.name)
  
  
  
      # "Groundhog day" time
  
      while True:
  
          time.sleep(999)
  
          pass
  
  
  
      #server.shutdown()

  This works well in my development laptop, but on the server i'm getting the following error :

  Traceback (most recent call last):
  
    File "server.py", line 31, in <module>
  
      server = ThreadedTCPServer((HOST, PORT), ThreadedTCPRequestHandler)
  
    File "/usr/lib/python2.7/SocketServer.py", line 408, in __init__
  
      self.server_bind()
  
    File "/usr/lib/python2.7/SocketServer.py", line 419, in server_bind
  
      self.socket.bind(self.server_address)
  
    File "/usr/lib/python2.7/socket.py", line 224, in meth
  
      return getattr(self._sock,name)(*args)
  
  socket.gaierror: [Errno -2] Name or service not known
  
  </module>

  I'm guessing it has to do with the port I'm using (6666), but I've tried others and it hasn't been working. Would Unix Domain Sockets be of use here ? Can you give me an example ?

• Thumbnail is not generated while uploading a video which is downloaded from the same server

  16 avril 2014, par nit3ch

  I am using drupal 7 video module and ffmpeg together to upload video on my site.
  My problem :

  1. Upload a video, everything works fine, thumbnail is generated and video is uploaded successfully
  2. Now download the above uploaded video.
  3. Now Try to upload the same video, on same drupal site.

  Thumbnail is not generating and also I am not able to play the newly uploaded video.
  In all other cases video upload is working fine, I am able to upload same video again and again with no fuss,but when I try to upload the downloaded video , everything goes wrong even if I change the file name after downloading the video and uploading again.

  Please let me know if I am not clear, will try to explain more.

• Retranslating video stream using ffmpeg

  6 mai 2014, par zdimon77

  I want to redirect video stream from rtmp to hls format using nginx rtmp-module.

  This my nginx config

      server {
  
      exec_options on;
  
      listen 1936;
  
      chunk_size 4000;
  
  
  
  
  
      application myapp {
  
       live on;
  
       exec /usr/bin/avconv -loglevel verbose -re -i rtmp://localhost:1936/myapp/$name -vcodec libx264 -vprofile baseline -acodec libmp3lame -ar 44100 -ac 1 -f flv rtmp://localhost:1935/hls/$name;
  
  
  
  
  
  }
  
  
  
  
  
  }
  
  
  
  server {
  
  
  
     listen 1935;
  
      chunk_size 4000;
  
  
  
      application hls {
  
          live on;
  
          hls on;
  
          hls_path /tmp/hls;
  
      }
  
  
  
  
  
  
  
  }

  But it doesnt work.
  When I try to publish my stream in console (without exec command in nginx.conf)

  ffmpeg -loglevel debug -re -i rtmp://localhost:1936/myapp/test -vcodec libx264 -vprofile baseline -acodec libmp3lame -ar 44100 -ac 1 -f flv rtmp://localhost:1935/hls/test

  I see this in console

  root@dcv23 :/usr/share/nginx/html# avconv -i rtmp ://localhost:1935/myapp/testname -vcodec copy -an -f flv rtmp ://localhost:1936/hls/testname

  avconv version 0.8.10-6:0.8.10-1, Copyright (c) 2000-2013 the Libav developers

  built on Feb 5 2014 17:15:30 with gcc 4.7.2

  [flv @ 0x98a3800] invalid stream

  [flv @ 0x98a3800] Estimating duration from bitrate, this may be inaccurate

  Input #0, flv, from ’rtmp ://localhost:1935/myapp/testname’ :

  Duration : N/A, start : 448.536000, bitrate : N/A

  Stream #0.0: Audio: nellymoser, 8000 Hz, mono, s16
  
  
  
  Stream #0.1: Video: flv, yuv420p, 800x600, 1k tbr, 1k tbn

  Output #0, flv, to ’rtmp ://localhost:1936/hls/testname’ :

  Metadata :

  encoder         : Lavf53.21.1
  
  
  
  Stream #0.0: Video: flv, yuv420p, 800x600, q=2-31, 1k tbn, 1k tbc

  Stream mapping :

  Stream #0:1 -> #0:0 (copy)

  Press ctrl-c to stop encoding

  ^Cframe= 200 fps= 7 q=-1.0 Lsize= 1031kB time=35.44 bitrate= 238.2kbits/s

  And process going but m3u8 files dont create.
  Can someone help me please ?
  Thank you.