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• shell scripting no such file or directory

  15 mars 2018, par Toto Tata

  I wrote a shell script that calls the ffmpeg tool but when I run it, it says No such file or directory yet it does !

  Here is my script :

  #!/bin/bash
  
  
  
  MAIN_DIR="/media/sf_data/pipeline"
  
  
  
  FFMPEG_DIR="/media/sf_data/livraison_transcripts/ffmpeg-git-20180208-64bit-static"
  
  
  
  for file in MAIN_DIR/audio_mp3/*.mp3;
  
  do
  
      cp -p file FFMPEG_DIR;
  
  done
  
  
  
  for file in FFMPEG_DIR/*.mp3;
  
  do
  
      ./ffmpeg -i ${file%.mp3}.ogg
  
      sox $file -t raw --channels=1 --bits=16 --rate=16000 --encoding=signed-
  
  integer --endian=little ${file%.ogg}.raw;
  
  done
  
  
  
  for file in FFMPEG_DIR/*.raw;
  
  do
  
      cp -p file MAIN_DIR/pipeline/audio_raw/;
  
  done

  and here is the debug response :

  cp: cannot stat ‘file’: No such file or directory
  
  ./essai.sh: line 14: ./ffmpeg: No such file or directory
  
  sox FAIL formats: can't open input file `FFMPEG_DIR/*.mp3': No such file or 
  
  directory
  
  cp: cannot stat ‘file’: No such file or directory

  FYI I’m running CentOS7 on VirtualBox

  Thank you

• Is every instance of subprocess.Popen() its own shell ?

  26 avril 2021, par saa-sof

  Background :
I'm trying to make an application that plays music via a GUI (Tkinter), Youtube_DL and FFmpeg. While the actual application is done it also requires FFmpeg to be an environment variable to work. Now, I'm trying to foolproof the creation of a "personal" FFmpeg environment variable in order to make the application portable (the last step is using pyinstaller to make a .exe file).

  


  Problem :
I'm trying to create the environment variable for FFmpeg by passing SET through subprocess.Popen :

  


  add_ffmpeg = subprocess.Popen(f"IF EXIST {path2set} SET PATH=%PATH%;{path2set}", shell=True)


  


  When I try to echo %PATH% (with Popen) the FFmpeg variable that should be present, is not. I just need to know whether or not I'm wasting my time with SET and should instead be using SETX or perhaps some other solution, I'm open to being told I did this all wrong.

  


  Relevant Code :

  


  # get any sub-directory with ffmpeg in it's name
ffmpeg = glob(f"./*ffmpeg*/")

# proceed if there is a directory
if len(ffmpeg) > 0:
    # double-check directory exists
    ffmpeg_exist = path.isdir(ffmpeg[0])

    if ffmpeg_exist:
        print("FFmpeg: Found -> Setting Up")
        
        # get the absolute path of the directories bin folder ".\ffmpeg-release-essentials.zip\bin"
        path2set = f"{path.abspath(ffmpeg[0])}\\bin\\"
        
        # add path of directory to environment variables
        add_ffmpeg = subprocess.Popen(f"IF EXIST {path2set} SET PATH=%PATH%;{path2set}", shell=True)
        add_ffmpeg.wait()
        
        # print all of the current environment variables
        list_vars = subprocess.Popen("echo %PATH%", shell=True)
        list_vars.wait()

else:
    print("FFmpeg: Missing -> Wait for Download...")
    
    # download the ffmpeg file via direct link
    wget.download("https://www.gyan.dev/ffmpeg/builds/ffmpeg-release-essentials.zip")
    
    # unzip the file
    powershell = subprocess.Popen("powershell.exe Expand-Archive -Path './ffmpeg-release-essentials.zip' "
                                  "-DestinationPath './'")
    powershell.wait()

    # remove the file
    remove("./ffmpeg-release-essentials.zip")

    # get any sub-directory with ffmpeg in it's name
    ffmpeg = glob("./*ffmpeg*/")

    # double-check directory exists
    ffmpeg_exist = path.isdir(ffmpeg[0])
    
    # proceed with if it exists
    if ffmpeg_exist:
        print("FFmpeg: Found -> Setting Up")
        
        # get the absolute path of the directories bin folder ".\ffmpeg-release-essentials.zip\bin"
        path2set = f"{path.abspath(ffmpeg[0])}\\bin\\"
        
        # add path of directory to environment variables
        add_ffmpeg = subprocess.Popen(f"IF EXIST {path2set} SET PATH=%PATH%;{path2set}", shell=True)
        add_ffmpeg.wait()

        # print all of the current environment variables
        list_vars = subprocess.Popen("echo %PATH%", shell=True)
        list_vars.wait()
        
    else:
        print("Something unexplained has gone wrong.")
        exit(0)


  


• Using FFMPEG, how do we add subtitles in the black bar area or under the video ?

  26 septembre 2020, par DunceDancer

  I followed these steps :

  


  


  1. Added the black bars

     


     -vf "scale=1920:1080:force_original_aspect_ratio=decrease,pad=1920:1080 :(ow-iw)/2 :(oh-ih)/2,setsar=1" Source :How to add black borders to video

     


  


  2. Added the subtitles ("burned" it into the video)

     


     ffmpeg -i "imput.mp4" -lavfi "subtitles=subtitles.srt:force_style='Alignment=0,OutlineColour=&H100000000,BorderStyle=3,Outline=1,Shadow=0,Fontsize=18,MarginL=5,MarginV=25'" -crf 1 -c:a copy "output.mp4" Source : ffmpeg subtitles alignment and position

     


  


  


  Now I am stuck as to how to place the subtitles under the video or in the black screen.

  


  Edit : Screenshot added to clarify

  


  Screenshot of the Problem