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• Hide subprocess output and store it in a variable in Python [duplicate]

  6 juillet 2022, par Dev01

  I would like to call a FFmpeg command, which produces a very big output.

  


  I need to store the output in order to make a regex on it.

  


  On the first command (echo), nothing is printed in my terminal, but for the ffmpeg command, huge output is produced (which I want to store in a variable, I don't want to have the output in my terminal)

  


  So my code looks like this for example :

  


  import subprocess
output = subprocess.check_output("echo a lot of wooooords")
output = subprocess.check_output("ffmpeg -i audio.mp3 -f null -", shell=True)


  


  Is it possible to hide the output for this command ? Why does it show me an output ? Thank you

  


• How can I run FFPROBE in a Python script without triggering the Windows Command window ?

  1er mars, par fnord12

  I am using ffmeg/ffprobe to get video durations (in an addon for Kodi). The code :

  


  result = subprocess.run(["ffprobe", "-hide_banner", "-v", "quiet", "-show_entries",
                                 "format=duration", "-of",
                                 "default=noprint_wrappers=1:nokey=1", filename], stdout=subprocess.PIPE, stderr=subprocess.STDOUT)


  


  The above code and the file importing that code both have a .pyw extension (after first trying regular .py).

  


  This works fine but in Windows 11 it causes the black Windows Command window to briefly flash for each video, despite the -hide_banner flag and loglevel being set to quiet. In Linux Mint it runs without any such window popping up.

  


  Found the answer : subprocess.run just needed a final shell=True as the last argument.

  


• Getting "Unrecognized option '1'" when using "-map_metadata -1" to erase metadata with ffmpeg [closed]

  20 novembre 2024, par Nautilus Era

  Edit :
  
As said in the header, this question is not about programing and I will ask it on the appropriate Stack.
  
My confusion came from the fact that I am using Python to make my calls to the shell, however, it has nothing to do with the problem I am trying to solve.
  
Thank you for your time and sorry for the bother.

  


  ---

  


  I was trying to erase metadata from a file using ffmpeg using the
following command :

  


  ffmpeg –i $file_path –map_metadata -1 –c copy $stripped_video_output


  


  Where $file_path and $stripped_video_output are variables containing
their respective path.

  


  ffmpeg gave the answer :

  


  Unrecognized option '1'. 
Error splitting the argument list: Option not found


  


  I am using Debian 12.

  


  I tried with both the repository's version as well as a compiled version
of ffmpeg and I tried on two different computers.

  


  If anyone can help with that, I would appreciate it.

  


  Thank you in advance and have a good one.