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• Need help on ffmpeg batch script

  14 août 2013, par Olung

  Trying to make a ffmpeg batch scripts that makes proress 422 proxy files from raw .mov files thats located in many subfolders. So far i got this :

  #!/bin/bash
  
  
  
  echo "drop source folder: "
  
  read source
  
  
  
  echo "drop destination folder: "
  
  read des
  
  
  
  find "$source" -name '*.mov' -exec sh -c 'ffmpeg -i "$0" -vcodec prores -profile:v 0 -an "$des/${0%%.mov}.mov"' {} \;
  
  exit;

  But it doesn't output to the destination folder, only the source folder and ask for an overwrite - not what I want.

  I guess it's a simple parameter error that maybe some of you can spot out ?

  All help is kindly appreciated !

• How to extract a sequence of frames with ffmpeg and get it with subprocess.Popen

  4 novembre 2019, par Core taxxe

  Since reading single frames is kinda slow , i tried to extract multiple frames at once. Now i got the Problem that ffmpeg does not return a list but a bunch of bytes.
  os : win10
  python version 3.7.4
  ffmpeg extracting frames from mp4

          command = [self.FFMPEG_BINARY,
  
                     '-loglevel', 'fatal',
  
                     '-ss', str(datetime.timedelta(seconds=frame_index / self._fps)),
  
                     '-i', os.path.join(self._path, self._filename),
  
                     '-threads', str(self.THREAD_NUM),
  
                     '-vf', 'scale=%d:%d' % (self._resolution[0], self._resolution[1]),
  
                     '-vframes', str(num_frames),
  
                     '-f', 'image2pipe',
  
                     '-pix_fmt', 'rgb24',
  
                     '-vcodec', 'rawvideo', '-']
  
  
  
          pipe = subprocess.Popen(command, stderr=subprocess.PIPE, stdout=subprocess.PIPE)
  
          tmplist = []
  
          for _ in range(num_frames):
  
              output, err = pipe.communicate()
  
              tmplist.append(output)
  
              if err: print('error', err); return None;
  
              pygame.image.frombuffer(output, self._resolution, "RGB")
  
  
  
          return tmplist

  Expected : a list of pygame Surfaces
  Got : ValueError : Buffer length does not equal format and resolution size

• Where does FFMPEG store temporary files in Linux ?

  8 juillet 2023, par 001121100

  I canceled the conversion of a very large file in ffmpeg. The incomplete file is taking up almost 200GB on my disk but it does not exist in the directory I was working in and I can't find it anywhere. Where does ffmpeg store temporary, incomplete, or canceled files ?

  


  (I've had a similar problem in the past when running a file recovery program - I canceled the recovery and the files disappeared. They are simply taking up "ghost" space on the directory and can't be located.)

  


  I've tried searching for the filename, clearing the trash, rebooting.