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• Batch Script to Download Video with youtube-dl and Convert with FFmpeg

  24 October 2019, by Matt McManis

  I’m trying to

  1. Using a single batch script to
  2. Download an mp4 video using youtube-dl
  3. Save the video’s original title to a batch variable
  4. Convert the video to webm with FFmpeg

  I want to keep the original title, so it needs to read the title with youtube-dl, save it to a variable, and use that variable for FFmpeg input/output filename.

  ---

  CMD Batch

  1. Download Video

  youtube-dl -f best "https://www.youtube.com/watch?v=TWNhqCHw0qc" -o "C:\Users\Matt\Downloads\%%(title)s.mp4" --merge-output-format mp4

  ---

  2. Download Video using Loop

  This is used to save the title to a variable %%a.

  for /f "delims=" %%a in ('youtube-dl -f best "https://www.youtube.com/watch?v=TWNhqCHw0qc" -o @"C:\Users\Matt\Downloads\%%(title)s.mp4" --merge-output-format mp4') do (echo example)

  ---

  3. Final Script
  Download Video, Save Title, Convert with FFmpeg

  Sorted

  for /f "delims=" %%a in ('
  
      youtube-dl 
  
      -f best "https://www.youtube.com/watch?v=TWNhqCHw0qc" 
  
      -o @"C:\Users\Matt\Downloads\%%(title)s.mp4" 
  
      --merge-output-format mp4
  
      ')
  
  
  
  do (ffmpeg -y 
  
      -i "C:\Users\Matt\Downloads\%%a.mp4" 
  
      -c:v libvpx -b:v 1300K -crf 16 -pix_fmt yuv420p 
  
      -map 0:v:0? -sn 
  
      -c:a libvorbis -q:a 6 -ac 2 -map 0:a:0? 
  
      -f webm
  
      "C:\Users\Matt\Downloads\%%a.webm"
  
      )

  Inline

  for /f "delims=" %%a in ('youtube-dl -f best "https://www.youtube.com/watch?v=TWNhqCHw0qc" -o @"C:\Users\Matt\Downloads\%%(title)s.mp4" --merge-output-format mp4') do (ffmpeg -y -i "C:\Users\Matt\Downloads\%%a.mp4" -c:v libvpx -b:v 1300K -crf 16 -pix_fmt yuv420p -map 0:v:0? -sn -c:a libvorbis -q:a 6 -ac 2 -map 0:a:0? -f webm "C:\Users\Matt\Downloads\%%a.webm")

  ---

  Error

  Before the script can ever reach FFmpeg, youtube-dl fails to download the file. It says the file has already been downloaded, even when there is no file in the directory.

  [download] @C#\Users\Matt\Downloads\Color Balloons.mp4 has already
  been downloaded

• How to create bash script with ffmpeg to flip a dir of vids 180, then stitch together without losing vid length

  25 September 2022, by Maude Rozencrance's Cat

  I'm trying to make a bash script in linux to flip a bunch of AVI files 180 degrees, then stitch them together without losing the length of the vids. My code works, but it truncates each vid and makes 60 10sec vids, which should be 600 seconds of video, down to about 11 seconds.

  


  I removed the transpose to flip the vids and now I'm getting the correct vid length. So it works, but I have to flip the vid in the video player.

  


  >videos.txt

files=DSCF*.AVI

for f in $files
do
    #make list of vids, copy to videos.txt
    echo "file '$f'" >> videos.txt;
    echo "duration 10.0" >> videos.txt;
    
done

#stitch all vids together
ffmpeg -f concat -safe 0 -i videos.txt -c copy bigvid.AVI


  


• Anomalie #620 (En cours): maintenir à jour les fonctions tierces incluses dans SPIP (script exter...

  7 July 2011, by cedric -