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• ffmpeg : converting jpeg image sequence to movie gets error "not enough frames to estimate rate consider increasing probesize" [on hold]

  29 décembre 2013, par enigmaticeasteregg

  I have an image sequence with a numbering system of : image-00001.jpg. I want to convert this to a movie using ffmpeg. I always get the error in the title no matter what I do. Below is the syntax I'm using. Any ideas ?

  ffmpeg.exe -f image2 -r 25 -start_number 1 -i sequence-%05d.jpg -vcodec mjpeg Q:\test.avi

• Movie from PNGs using FFmpeg and Python - rgb24 vs yuv420p

  7 février 2016, par Eilam G

  I wrote a little Python program to grab a bunch of PNGs and render them into a movie using the FFmpeg command line. The PNGs are read into [X*Y*3] numpy arrays (ignoring the alpha channel), new frames are added via interpolation, and the data is fed into FFmpeg as a pipe and saved as an mp4.

  The files play fine in VLC on Windows, but don’t work in iMovie on a Mac. I think it might have to do with most programs expecting H264 videos to be in the YUV420P color space, which my movies aren’t. I’ve tried changing the ffmpeg command -pix_fmt from rgb24 to yuv420p, but no go.

  Relevant Python code attached below.

  def init_vars(args):
  
      global log_file, file_names, command, num_int_frames, num_files, silent
  
  
  
      file_names = glob('./*.png')
  
      num_files = len(file_names)
  
  
  
      if args.log:
  
          log_file = 'bmmp.log'
  
      else:
  
          log_file = os.devnull
  
  
  
      silent = args.silent
  
  
  
      frames_per_second = args.fps
  
      wanted_movie_length = args.length
  
      movie_file_name = args.name + '.mp4'
  
  
  
      num_int_frames = round((frames_per_second * wanted_movie_length - 1) / (num_files - 1) - 1)
  
  
  
      if sys.platform == 'win32':
  
          ffmpeg_bin = 'ffmpeg.exe'
  
      else:
  
          ffmpeg_bin = 'ffmpeg'
  
  
  
      command = [ffmpeg_bin,
  
                 '-y', # (optional) overwrite output file if it exists
  
                 '-f', 'rawvideo',
  
                 '-vcodec','rawvideo',
  
                 '-s', '1280x720', # size of one frame
  
                 '-pix_fmt', 'rgb24',
  
                 '-r', str(frames_per_second), # frames per second
  
                 '-i', '-', # The input comes from a pipe
  
                 '-an', # Tells FFMPEG not to expect any audio
  
                 movie_file_name]

  Cheers,
  Eilam

• JAAD exception "movie box at end of file"

  12 avril 2023, par B. Stackhouse

  I'm using JAAD (Java Advanced Audio Decoder) version 0.8.4, and m4a songs imported by the iTunes player from a CD play correctly. Any mp3 songs converted by ffmpeg to m4a results in an JAAD error during the following statement. I have seen this question before, but never any solution. What do I need to do ?

  


  for example :

  


  ffmpeg -i input.mp3 -vn -c:a aac -b:a 192k output.m4a  

final AudioInputStream audioInputStream = AudioSystem.getAudioInputStream(songFile.toURI().toURL());

net.sourceforge.jaad.mp4.MP4Exception: movie box at end of file, need random access