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• How to use ffmpeg in a python function

  18 février 2019, par Jamiewp

  I have tried to use a ffmpeg to extract an audio from a video file and this is my code

  import io
  
  import os
  
  import subprocess
  
  
  
  def extract_audio(video,output):
  
      command = "ffmpeg -i '{video}' -ac 1  -f flac -vn '{output}'"
  
      subprocess.call(command,shell=True)
  
  
  
  extract_audio('dm.MOV','dm-new.flac')

  And I got no error after compiled. By doing this I should get a new file which is ’dm-new.flac’. But there is no such a flac file created after I compile the script. I think there are something wrong with the syntax or something in the variable ’command’ which I have no idea to fix this. My question here is how can I use ffmpeg in a python function base on this code ?

  By the way, I knew that I could just use ffmpeg without writing a function. But I really need to write in in a function. Thank you

• How to convert audio files from mp4 to mp3 using applescript ?

  15 décembre 2017, par MBUST

  Can someone please help me understand how to convert audio files from mp4 to mp3 using AppleScript ?

  I have tried scripting VLC or Sound Studio but the commands don’t seem to come close to doing that. I downloaded and installed ffmpeg but I don’t know the syntax to use.

  I tried something like this with ffmpeg :

   tell application "Finder"
  
  set CurrentPath to container of (path to me) as alias
  
  set OriginalFile to CurrentPath & "ASProcessing:SoundToProcess.mp4" as string
  
  set NewFile to CurrentPath & "ASProcessing:NewFile.mp3" as string
  
  
  
  end tell
  
  
  
  
  
   set outputFile to POSIX path of OriginalFile
  
   set inputFile to POSIX path of NewFile
  
   do shell script ffmpeg something, something

  But clearly I’m missing most of the script syntax. Eventually, I would do a repeat loop to go through a set of files.

  Sorry that I can’t be more specific. I’m pretty lost with this. What I do know is that I do not want to use Automator. I need something like AppleScript.

  Thanks.

  mbust

• python - tqdm progress bar on ffmpeg process with avs pipe

  9 octobre 2019, par MeSo2

  I am trying to implement a tqdm progress bar, but have no idea on how to do this when calling ffmpeg with check_output. (Most of the commands are set inside the avs file.)

  from subprocess import check_output
  
  check_output("ffmpeg -i \"temp_AVS.avs\" -c:v libx264 -b:v 25M -c:a aac 1.mp4", shell=True) 

  I cam across this Can ffmpeg show a progress bar ? but nothing hints on how to best implement it with my code.

  I also found this related post How to link the ffmpeg transcoding process information into a vb6 GUI app ?, and it look like I just need to call for the ffmpeg output. But I am note sure how to do that.