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• how to modify movie filter in ffmpeg using zmq

  14 juin 2016, par ramon1604

  So far, we can modify overlay, scale and others but we do not find the proper syntax to modify movie filter in ffmpeg. We are using perl to send zmq command to ffmpeg and it returns 0 success when command is properly received. Please help. thanks

• Extract WAV audio file from video after uploading on web, using FFMPEG in django

  26 mars 2019, par maryam mehboob

  Problem

  I am trying to find a way to extract an audio wav file from a mp4 video file that is uploaded by a web user using ffmpeg using Django.

  If I will find to extract audio, then where should I save it in my project ?

  1. I tried it with "Django-ffmpeg", but didn’t convert and was stuck in ’pending conversion’ message.

  2. Then I tried with :

     import subprocess
     
     
     
     subprocess.call('ffmpeg -i filename.mp4 filename.wav')

  Error

  

  Script

  def validate_file_extension(value) :
  import os
  from django.core.exceptions import ValidationError
  ext = os.path.splitext(value.name)1 # [0] returns path+filename
  filename = os.path.splitext(value.name)1 # [0] returns path+filename
  valid_extensions = [’.mp4’]
  if not ext.lower() in valid_extensions :
  raise ValidationError(u’Unsupported file extension.’)
  else :
  import subprocess
  subprocess.call(’ffmpeg -i filename.mp4 filename.wav’)

• conversion from mp3 to ogg using php

  9 janvier 2014, par Preethy

  I want to convert mp3 file to ogg. I tried the following code

  exec("/usr/local/bin/ffmpeg -i 1.mp4 -vcodec libtheora -acodec libvorbis testjohn4545454.ogg",$output);
  
  var_dump($output);

  But it does not convert the file and it only returns array(0) { }
  and it only takes a little execution time.

  But the conversion is success when using ssh command.

  Please give me solution.