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• Python script than run another python script, ffmpeg2vmaf

  16 mai 2018, par Asusio

  I want to build a little API to use ffmpeg2vmaf to analyze videos that are made for the video streaming (DASH, HLS).

  I’m on Linux Ubuntu 16.04, I’m using python 3.

  My API can now concatenate the files into an MP4 file. To do it I’m using the library subprocess and the command cat.

  But when I want to use ffmpeg2vmaf it can’t find a library that ffmpeg2vmaf use.

  This is how I do :

  try:
  
      os.chdir("/home/USERNAME/VMAF/vmaf/")
  
      output_cmd = subprocess.check_output(["sudo ./ffmpeg2vmaf WIDTH HEIGHT \
  
                   '/home/alexis/video/ref.mp4' '/home/alexis/video/dist.mp4'\
  
                   >> '/home/alexis/analyze/analyze.txt'"], shell = True)
  
  except subprocess.CalledProcessError:
  
      print("Error")

  The error is :

  Traceback (most recent call last):
  
      File "./ffmpeg2vmaf", line 8, in <module>
  
          from vmaf.config import VmafConfig, DisplayConfig
  
  ImportError: No module named vmaf.config
  
  </module>

  But if I use the same command without python, in the terminal, it works.

  I have try to put my API in the same folder as "ffmpeg2vmaf" but it still doesn’t work.

  Thank you by advance

• FFmpeg ubuntu script [on hold]

  9 décembre 2015, par Sambir

  Hi guys i want to create an ffmpeg script which picks up files from one folder transcodes them then deletes the source.

  So think of the following scenario :

  I place file A.mp4 and A.srt in folder input
  I also place file B.mp4 and B.srt in folder input

  In the night a script is executed which picks up these files places them in the folder "transcoding" then starts to transcode the movies one by one. So not parallel.

  When finished new files should be created in the output folder by the ffmpeg script. And the files in the folder "transcoding" should be deleted.

  Can anyone help me out here. It does not seem to be that complex but since I am not that good at coding any help is appreciated :)

• PHP shell_exec wait for script to done ? [duplicate]

  6 mars 2016, par Melih Büyükbayram

  This question already has an answer here :

  • PHP shell_exec wait for script to finish ? [duplicate]
    
    1 answer
    

  I have a PHP script that queries a database for a list of jobs to be done and fires off other PHP scripts based on what it finds in the database (basically a process queue).

  Some of the scripts that the queue runner script executes may take 30 seconds or so to finish running (convert video, resizing images, etc).

  The problem is that shell_exec() in the queue runner script calls the processing scripts, but then doesn’t wait for them to finish, resulting in the queue not being completed.

  Queue runner script :

  #!/usr/bin/php
  
  <?php
  
      // Loop through database and find jobs to be done
  
      shell_exec("nohup $command > /dev/null 2> /dev/null & echo $! &");
  
  ?>

  Running the job script directly from the command line works and the PDF is created.

  Any ideas on how to fix this ? Or a better way to run a process queue ?