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• FFMpeg Commands definition in library source code

  25 janvier 2013, par SKC

  I tried running the ffmpeg commands from Android activity using an emulator in Windows OS, but i get errors.
  I tried keeping both my resource files in /mnt/sdcard as well the application package within /data/data, but none of the options worked out for running the ffmpeg commands.

  These are the following approach i had taken while running the command through an android activity.
  (Command to convert a series if images into a video)
  Approach 1 :

      String[] cmd =new String[4];
  
      cmd[0]="/data/data/com.example.commandlineffmpeg/files/ffmpeg";
  
      cmd[1]="-i";
  
      cmd[2]="/data/data/com.example.commandlineffmpeg/images/bpc_%03d.png";
  
      cmd[3]="/data/data/com.example.commandlineffmpeg/out/out.avi";
  
  
  
      Process p = Runtime.getRuntime().exec(cmd, null, new File("/data/data/com.example.ffmpegnew/out"));

  I have solved this, basically there was system permission issues and hence we were not allowed to access the system properties required to run the FFMpeg commands.
  Thus we need to sign the apps with the system certificates and hence we can use FFMpeg commands directly from any android activity.

• How to run a python code via Django templates ?

  18 novembre 2018, par Iskender Berdiev

  I want to execute code below when the is submitted (project on Django) :

  from os import system, listdir, remove
  
  link = 'https://www.youtube.com/watch?v=ME9yO1KEVoo'
  
  
  
  def download(): ## Downloading a video from YouTube using youtube-dl
  
      system("youtube-dl -o download {}".format(link))
  
  
  
  def convert():  ## Converting downloaded video to mp3 format via ffmpeg.exe(same directory)
  
      listOfFiles = listdir('.')
  
      for i in listOfFiles:
  
          if i.startswith("download"):
  
              name = i
  
              system("ffmpeg -i {} download.mp3".format(name))
  
  
  
  def main():
  
      download()
  
      convert()
  
  
  
  main()

  I have tried to put this code into views.py :

  class download(TemplateView):
  
      def main(request):
  
          if request.method == 'POST':
  
              link = 'https://www.youtube.com/watch?v=ME9yO1KEVoo'
  
              system("youtube-dl -o download {}".format(link))
  
              listOfFiles = listdir('.')
  
              for i in listOfFiles:
  
                  if i.startswith("download"):
  
                      name = i
  
                      system("ffmpeg -i {} download.mp3".format(name))
  
          return redirect ('loader/wait.html')

  urls.py :

  path('wait/', views.download.as_view(), name='wait')

  and the html form which is submitted to run views.download.as_view() :

  <form action="{% url " method="POST">{% csrf_token %}
  
  <input type="submit" value="Yes" />
  
  </form>

• FFmpeg error code 254

  17 septembre 2013, par Akerus

  I try to get file informations via ffprobe in a java-application.

  I am using the following command :

  /usr/bin/ffprobe -v quiet -print_format json -show_format -show_streams TESTVIDEOPATH

  Running that command in bash, it works like a charm : It returns the JSON-String and error code is "0".
  Running that command in Java results in error code "254" and result is :

  \n\n

  When I modify the command, so that ffprobe accepts a stream as input :

  /usr/bin/ffprobe -v quiet -i - -print_format json -show_format -show_streams

  it works in both bash and Java.

  In Java the following is used :

  ProcessBuilder processBuilder = new ProcessBuilder(command.split(" "));
  
  this.process = processBuilder.start();
  
  this.process.waitFor();
  
  int exitCode = this.process.exitValue();
  
  this.outputOfProcess = this.process.getInputStream();

  Can anyone tell me what the error code 254 means ? I couldn't find anything about it.

  Edit : ffmpeg version 0.10.7-6:0.10.7-0jon1 quantal is used