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• How to modify this Windows script to do a match ?

  21 janvier 2016, par Andrei Clear

  ffmpeg can resize a video/image file .. first is input_file .. parameters .. output_file ..

  ffmpeg -i input.avi -vf scale=320:240 output.avi

  or

  ffmpeg -i 20140724_071746.mp4 -vf scale=640:-1 20140724_071746_LOW_640.mp4

  more info here : https://trac.ffmpeg.org/wiki/Scaling%20%28resizing%29%20with%20ffmpeg

  I want it to downscale all the videos on my microSD card to create space (I have originals backed-up)

  So I want it to go throw all the files in all the sub-directories overnight and resize all the files. Chances are that the script might stop or crash and I would need to run it again, or if I add new files I would want to run it again.

  So I would want it to skip processing all the files that have been processed AND their resized versions.

  In my case if a FILE_NAME.mp4 also has FILE_NAME_LOW_640.mp4 SKIP it
  AND
  if a FILE_NAME_LOW_640.mp4 has *640 SKIP it

  Here is my Windows batch script so far

  REM @echo off
  
  REM just save as "DOS"
  
  REM cd /d C:\s
  
  
  
  setlocal enabledelayedexpansion
  
  for %%j in (*.mp4) do (
  
  set filename=%%~nj
  
  echo %%j
  
  
  
  ffmpeg -i %%j -vf scale=640:-1 %%j_LOW_640.mp4
  
  
  
  REM but now I want to add the two checks to skip files that have been resized .. or if they are the resized version 
  
  
  
  REM if not "!filename!"=="%%j_LOW_640.mp4" AND IF FILE !COINTAIN *640* THEN ffmpeg -i %%j -vf scale=640:-1 %%j_LOW_640.mp4
  
  
  
  )
  
  
  
  pause
  
  REM AND I would also want it to process all the sub-directories  

  In other words my questions for help are :

  1. How can I do a check for a string if it contains a string match ?

  2. How can I have my script also process all the subdirectories ?

• Bash script to extract first seconds and rename mp3 files in folder

  15 mai 2015, par Designs Edge

  I have a folder with several MP3 files that I need to extract 10-15 seconds of audio from. I would also like to rename these by appending sample-(name).mp3 to the converted files. How can I do this via Shell Script ? Thanks in advance !

• Permission Denied error with Get-ChildItem in PowerShell script

  8 juillet 2020, par owcs

  Whenever I try to run my PowerShell script, I get an error. Please note that I don't have much programming knowledge.

  


  Here is the code (with some folder names replaced)

  


  cd -Path "F:\****\folder1"
$files = Get-ChildItem
foreach ($file in $files) {
  $newName = $file.BaseName + ".mp3"
  ffmpeg -i $file.FullName -codec:a libmp3lame -b:a 320k $newName
}


  


  Inside of folder1, there is folder2, which has the files I want to get. I'm not running in folder2, because in the future there will be a folder3 inside of folder1 and I want to get files from both. I am getting the error :

  


  F:\****\folder1\folder2: Permission denied


  


  I believe the error is with Get-ChildItem. How can I fix this ? I am running the script as administrator.