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• POST 500 Error (BrokenPipeError) when launching Video Stream

  2 décembre 2015, par Charlie

  I’m using Python 3.4.1, nodejs and a Python server to stream video to my browser.

  • The list of videos to play is stored in JSON.

  • I launch the Python server & the nodejs server.

    > node server.js
    
    Listening for MPEG Stream on http://serverIP:port1
    
    Awaiting WebSocket connections on ws://serverIP:port2/

  My Python method streams the video using port1, then in the browser I use a jsmpg canvas connected to port2.

      var client = new WebSocket( 'ws://serverIP:port2/' );

  All this works fine in local.

  But when using it on the server, we get a POST 500 (Internal Server Error).
  In shell, the error is :

  pipes[0].stdin.write(Video_editor.clip_final.get_frame(intervals[i][1] + float(t)/thefps).tostring())
  
  BrokenPipeError: [Errno 32] Broken pipe

  • Both ports are open.
  • The distribution & ffmpeg versions are the same, on my machine & on the server.

  I’ve found similar questions here, but none fitting my configuration. My code is as below. Thanks in advance :)

  def stream_video(self, address):
  
  
  
      #We create one pipe and one command per sequence. Then, for
  
      #each interval of time out of a composition, we run the basic
  
      #streaming. Otherwise, we run the corresponding streaming
  
      fp = open("log_stream.txt", "w") # just log purpose
  
      ff_cmds = [ffmpeg.FFmpeg_command_builder().get_main_command(address, Video_editor.clip_final)]
  
      pipes = [sp.Popen(ff_cmds[-1], stdout = DEVNULL, stdin=sp.PIPE, stderr=fp)]
  
      intervals = [[False, 0]]
  
  
  
      for val in Video_editor.ffmpeg_compositions:
  
          ff_cmds.append(ffmpeg.FFmpeg_command_builder().get_overlay_command(address, Video_editor.clip_final, val[0], val[2], val[3], val[4], val[5]))
  
          pipes.append(sp.Popen(ff_cmds[-1], stdout = DEVNULL, stdin=sp.PIPE, stderr=fp))
  
  
  
          intervals.append([True, val[1]])
  
          intervals.append([False, val[1] + val[2]])
  
  
  
      intervals.append([False, Video_editor.clip_final.end])
  
  
  
      i = 0
  
      n = 0
  
      for i in range(len(intervals) - 1):
  
          print("Interval", intervals[i], intervals[i+1])
  
          if intervals[i][0]:
  
              n += 1
  
  
  
          for t in range(int(Video_editor.clip_final.fps*(intervals[i+1][1] - intervals[i][1]))):
  
              if intervals[i][0]:                                  
  
                  pipes[n].stdin.write(Video_editor.clip_final.get_frame(intervals[i][1] + float(t)/Video_editor.clip_final.fps).tostring())
  
              else:
  
                  pipes[0].stdin.write(Video_editor.clip_final.get_frame(intervals[i][1] + float(t)/Video_editor.clip_final.fps).tostring())
  
  
  
      for pipe in pipes:
  
          pipe.terminate()

• time stamping using ffmpeg for recording the live stream

  6 septembre 2012, par user1650873

  I have a live video coming from multicast address 239.xxx.xxx.xxx port 5006 with 15 frames/s, i want to capture this video and time stamp current date and time, and save it in MPEG4(h.264) format using ffmpeg. since i am new to ffmpeg please help me in this matter.

• ffmpeg split video H264 stutters on Windows Media Player

  9 mars 2019, par Juan Foegen

  I am converting and splitting wmv and mp4 into new mp4 files. I am using ffmpeg to do the conversion with simply :
  ffmpeg -i inputfile.wmv -vcodec libx264 -ss 00:00:10 -t 00:00:15 outputfile.mp4

  So when I create my split video it plays fine on other video players, like VLC, but stutters when initially playing on Windows Media Player and even shows a blank screen for a moment and then after about 5 seconds, the video will play normally. If I then select play again without reloading, Windows Media Player will play the video fine, with no stuttering.

  If I REMOVE the start parameter when doing the conversion, then the resulting video will play without issues on all my players, INCLUDING Windows Media Player.

  I have tried changing the frame rate, the bit rate and altered different optimization options mentioned here - https://trac.ffmpeg.org/wiki/Encode/H.264

  I need the split video to play on Windows machines on Windows Media Player and on the web streamed using the video element. This is why I chose H264 codec and MP4.

  Has anyone had issues playing ffmpeg split videos using H264 codec with Windows Media Player ? I am using the latest version of ffmpeg. Anyone have any other suggestions on any different settings I could try to adjust ?

  Thanks