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• How to create FFMPEG command that position a movie in a frame

  31 janvier 2019, par S.T

  I want to create FFMPEG command that takes 2 movies and position it inside a frame at a specified x and y next to each other and then create one movie from it.

  This is a command i did which create a movie that puts 2 movies next to each other with a space of 10 pixels between them.

  complexCommand = new String[]
  "-i", tempPath1, "-i", tempPath2, "-strict","experimental",
  "-filter_complex",
  "[0:v:0]pad=iw*2:ih+20:color=white[bg] ;"+
  "[bg][1:v:0]overlay=w+10:h+10",
  "-s", "320x240","-r", "30", "-b", "15496k", "-vcodec", "mpeg4",
  "-ab", "48000", "-ac", "2", "-ar", "22050",

  The problem is that i want more abilities like control the position of each movies (multiple movies), an explanation or an example how to use the padding and the position of the movies.

  Thanks a lot.

• How to detect added scenes in Director's Cut Edition of movie ?

  17 juillet 2019, par B Lolo

  I’ve got huge collection of .mkv files. In every movie folder there are two files : one original movie and one extended edition of that movie.

  Two files can be different for example one is 480p and the second 1080p.

  One can be 1 hour long, second one 40 minutes.

  In those extended edition files scenes are added randomly, so it could be 2 minutes in beginning, 5 minutes after first 10 minutes of the film and so on.

  Is there a way to use Python and ffmpeg to detect scenes from extended edition files that are absent in original movie file ?

  I can also work with only audio if that is easier to do.

  For now I got idea to use ffmpeg and scene detection, I can manually search for differences between files, but I would like some hints where to look changes.

  This is python code with ffmpy library :

  from ffmpy import FFmpeg
  
  
  
  plik = "C:/special.mkv"
  
  png = re.sub("\.mkv","_changes.png",plik)
  
  
  
  ff = FFmpeg(executable='C:/ffmpeg.exe', global_options ='-v error', inputs={plik : ''}, outputs={png : "-vf select='gt(scene\,0.4)',scale=320:-1,tile=10x80 -frames:v 1 -y"})
  
  result = ff.run(stdout=PIPE, stderr=PIPE)

• Python : movie stream into pygame

  4 mars 2019, par user1533267

  Quick challenge :

  I’m streaming part of my desktop screen trough the network using the following :

  Server

  $ ffmpeg -f x11grab -s 800x600 -r 30 -i :100 -an -q 10 -f mjpeg - | nc -lp 5000 

  Client

  $ nc <computer address="address"> 5000 | ffplay -
  
  </computer>

  I would like to display the following stream inside my pygame opengl window on the client, I read some documents on pygame.movie and found :

  "Load a new MPEG movie stream from a file or a python file object."

  Would it be possible to load the stream into pygame ?
  I need it to be as responsive as possible, and right now im seeing about 500ms lag.

  Any ideas ?

  Thanks.