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• Compress videofiles from context menu in Windows 11 using ffmpeg

  11 janvier 2023, par Rayearth

  I'd looking for an easy way to just right click on a folder in Windows and be able to loop through video files and compress them with ffmpeg with prepared command settings.

  


  Been able to prepare the reg file to import but I think I'm missing something important here (working directory reference I think). How should I pass the working dir path inside a command like that for this mechanism to work ?

  


  Windows Registry Editor Version 5.00

[HKEY_CLASSES_ROOT\Directory\Shell\Compress_videos]
@="Compress videos"

[HKEY_CLASSES_ROOT\Directory\Shell\Compress_videos\command]
@="cmd /c for \"%E\" in (.mp4, .mkv, .mov, .avi) do forfiles /m *\"%E\" /c \"cmd /c C:\\Windows\\System32\\ffmpeg.exe -hide_banner -y -hwaccel cuda -i @path -c:v hevc_nvenc -b:v 8000k -c:a copy @fname_compressed.mp4\""


  


• Python running a cmd command(ffmpeg) with subprocess and wait for cmd to close before executing some code

  14 décembre 2019, par Fam

  So im using ffmpeg to resize a video, and this takes a little while so before the code continues i have to wait for the cmd to close. I havent been able to find a solution and i hope someone that actually knows their stuff can teach me a way. im probably just doing something retarded...
  Anyway i have tried multiple things like using subprocess.Propen() and then using pope() to see when it doesnt return "None" also tried stuff like subprocess.run() with subprocess.CompletedProcess() but i just cant get it to work could someone please care to explain if there is a way to do this and that im just doing it wrong ? :)

  Here is an example of what I tried

  p = subprocess.Popen("start ffmpeg -y -i "+DIR+"/post.mp4 -vf scale="+str(nW)+":"+str(nH)+" "+DIR+"/post_r.mp4", shell=True)
  
      while p.poll() is None:
  
          time.sleep(1)
  
          print("alive")
  
      else:
  
          print("cmd exited")

  Also whenever i put shell=False it just breaks instantly and I get this error :
  FileNotFoundError : [WinError 2] The system cannot find the file specified

• subprocess ffmpeg multiple drawtext

  6 juillet 2012, par knishua

  stuck here, how is it possible to pass multiple parameters in ffmpeg via subprocess

  1. this command works in 'cmd'

     ffmpeg -threads 8 -i D :/imagesequence/background.jpg -vf "movie='D~:/imagesequence/thumbnail.jpg' [watermark] ; [in][watermark] overlay=(main_w-overlay_w)/2 :(main_h-overlay_h)/3[water] ;[water] drawtext=fontsize=32:fontcolor=White:fontfile=/Windows/Fonts/arial.ttf:text='shotName':x=(w)/2:y=(h)-50,drawtext=fontsize=28:fontcolor=White:fontfile=/Windows/Fonts/arial.ttf:text='Notes ~:':x=(w)/5:y=(h)-90,drawtext=fontsize=28:fontcolor=White:fontfile=/Windows/Fonts/arial.ttf:text='Frame Range ~:':x=(w)/5:y=(h)-130,drawtext=fontsize=28:fontcolor=White:fontfile=/Windows/Fonts/arial.ttf:text='Lens ~:':x=(w)/5:y=(h)-170,drawtext=fontsize=28:fontcolor=White:fontfile=/Windows/Fonts/arial.ttf:text='Undistortion ~:':x=(w)/5:y=(h)-210,drawtext=fontsize=28:fontcolor=White:fontfile=/Windows/Fonts/arial.ttf:text='Image Sequence ~:':x=(w)/5:y=(h)-250,drawtext=fontsize=28:fontcolor=White:fontfile=/Windows/Fonts/arial.ttf:text='Date ~:':x=(w)/5:y=(h)-290,drawtext=fontsize=28:fontcolor=White:fontfile=/Windows/Fonts/arial.ttf:text='Element Name ~:':x=(w)/5:y=(h)-330,drawtext=fontfile=/Windows/Fonts/arial.ttf:text='FUTUREWORKS':x=130:y=200:fontsize=54:fontcolor=White[out]" D :\imagesequence\dpx\brn_055.0000.dpx

  2. when trying thru subprocess it fails. instead of trying the whole of it, tried

     thj = "D~:/imagesequence/thumbnail.jpg"
     paramd = "movie='%s'[watermark] ;[in][watermark]overlay=(main_w-overlay_w)/2 :(main_h-overlay_h)/3[water] ;[water]drawtext=fontsize=32:fontcolor=White:fontfile=/Windows/Fonts/arial.ttf:text=\'shotName\':x=(w)/2:y=(h)-50[out]" % thj
     subprocess.check_call(["ffmpeg", "-threads", "8", "-i", "D :/imagesequence/background.jpg", "-vf", paramd ,"D :/imagesequence/dpx/brn_055.0000.dpx"], shell=True)

  This is only putting 1 text instead of 5 text on the screen

  any different view on this. how to successfully run this command