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• An H264 encoded MP4 file cannot be played by VLC/HTML5 browsers, is there any header or meta data I can add to fix it ? [migrated]

  5 avril 2015, par user534498

  I have an MP4 file, which is H264 encoded. I saved the file from RTP streams, with sprop-property-sets in front, and followed by frames. (Note. VLC can directly play the RTP stream without problem.)

  The file can be played by "Videos" program in Linux. If I play it with VLC 2.1.4 in Linux, it shows the following error.

  No suitable decoder module : VLC does not support the audio or video
  format "undf". Unfortunately there is no way for you to fix this.

  I then open VLC, from preference menu, I change the Demuxer (demultiplexer) from automatic to "H264 Video Demuxer". VLC can then play it.

  So it seems that the problem is VLC cannot automatically detect a demuxer from the video file. However, I am sure that my video file has only video data, and it doesn’t even have audio (may not even need a demuxer ?)

  I put this file in HTTP server, and use "video" tag for testing, all IE, chrome and firefox browsers cannot play this file, and I guess it’s the same reason as VLC cannot play it.

  So is there a way to fix it ? For example, is there any place I can add a header to tell VLC or similar players to choose H264 video demuxer ?

  Thanks.

• Loop a video with ffmpeg

  4 mars 2015, par Ellebkey

  I am triying to loop a short video using ffmpeg in python, and i have the next code :

  FFMPEG_BIN = "ffplay"
  
  
  
  import subprocess as sp
  
  import os   
  
  
  
  def playVideo(video):
  
      command = [ FFMPEG_BIN,video,'-autoexit']         
  
      pipe = sp.Popen(command, stdout = sp.PIPE, bufsize=10**8, stderr = sp.PIPE)
  
      pipe.wait()
  
  
  
  def playPrincipal():
  
      command = [ FFMPEG_BIN,"videos/01-bienvenida.webm","-autoexit","-an","-loop 0"]
  
      pipe2 = sp.Popen(command, stdout = sp.PIPE, bufsize=10**8, stderr = sp.PIPE)

  but the video doesnt show on my second method, im making a body gesture recognition so the point is to show a principal video stay on a loop playPrincipal() like a background, and when I detect a position show other video in front of the first video,that part alredy works, and when the video ends the first video still playing. My second though was to make a large video and play it, but after around 1.30min the screen frezze, so the video just stop.

• Anomalie #3386 : Spip derrière Varnish : port non-standard dans l’URL ?

  15 février 2015, par Fil Up

  ou bien, pour la liste des ports à ignorer :
  define('_PORTS_STANDARDS', '80,443')

  Certes, mais ça sort du cadre de ce ticket, non ?

  Puisqu’on parle d’un bug de SPIP (qui réécrit l’URL dans un cas où il ne faudrait pas), il faut d’abord trouver une solution interne à SPIP.

  SPIP doit pouvoir marcher avec un varnish de base, sans conf spécifique. Parfois l’hébergeur te met un varnish en front et ne te permet pas de le configurer. C’est pour ça que je ne suis pas pour le fait d’exiger un réglage spécifique côté Varnish.

  À noter : il est certainement possible de bidouiller la valeur problématique depuis le fichier mes_options.php