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• Révision 17405 : Petit changement dans l’appel des 2 fonctions infos_plugin et infos_paquet charg...

  14 mars 2011, par esj@rezo.net

  Par exemple pour avoir le tableau des arbres des syntaxe abstraites de tous les plugins d’un dépot, faire : $ar = file_get_contents(’archives.xml’) ; preg_match_all(’@&lt ;plugin&gt ;.* ?&lt ;/plugin&gt ;@s’, $ar, $m) ; $f = charger_fonction(’infos_plugin’, ’plugins’) ; $m = $m[0] ; (...)

• add thumbnail and metadata to mp3 file on converting using youtube-dl by python script

  18 septembre 2015, par arun pal

  I want to add metadata as well as thumbnail image to my mp3 file. How to do that , can anybody help me ?

  from __future__ import unicode_literals
  
  import youtube_dl
  
  
  
  n="cwHzy7ftLyI"
  
  
  
  ydl_opts = {
  
      'format': 'bestaudio/best',
  
  
  
      'verbose':True,
  
  
  
      'postprocessors': [{
  
          'key': 'FFmpegExtractAudio',
  
          'preferredcodec': 'mp3',
  
          'preferredquality': '192',
  
          }],
  
          'addmetadata':True,
  
          'embedthumbnail':True,
  
          'writethumbnail':True,
  
      }
  
  with youtube_dl.YoutubeDL(ydl_opts) as ydl:
  
      ydl.add_default_info_extractors()
  
      ydl.download(['http://www.youtube.com/watch?v='+n])

• FFMPEG/tensorflow warping .mp4's with no observable pattern of correlation

  25 mai 2018, par ThePeskyWabbit

  The function that performs the processing is here :

  def ffwd_video(path_in, path_out, checkpoint_dir, device_t='/gpu:0', batch_size=4):
  
  video_clip = VideoFileClip(path_in, audio=False)
  
  video_writer = ffmpeg_writer.FFMPEG_VideoWriter(path_out, video_clip.size, video_clip.fps, codec="libx264",
  
                                                  preset="slow", bitrate="3000k",
  
                                                  audiofile=path_in, def ffwd_video(path_in, path_out, checkpoint_dir, device_t='/gpu:0', batch_size=2):threads=None,
  
                                                  ffmpeg_params=None)
  
  
  
  g = tf.Graph()
  
  soft_config = tf.ConfigProto(allow_soft_placement=True)
  
  soft_config.gpu_options.allow_growth = True
  
  with g.as_default(), g.device(device_t), \
  
          tf.Session(config=soft_config) as sess:
  
  
  
      batch_shape = (batch_size, video_clip.size[1], video_clip.size[0], 3)
  
      print(batch_shape)
  
      img_placeholder = tf.placeholder(tf.float32, shape=batch_shape,
  
                                       name='img_placeholder')
  
  
  
      preds = transform.net(img_placeholder)
  
      print(preds)
  
      saver = tf.train.Saver()
  
      if os.path.isdir(checkpoint_dir):
  
          ckpt = tf.train.get_checkpoint_state(checkpoint_dir)
  
          if ckpt and ckpt.model_checkpoint_path:
  
              saver.restore(sess, ckpt.model_checkpoint_path)
  
          else:
  
              raise Exception("No checkpoint found...")
  
      else:
  
          saver.restore(sess, checkpoint_dir)
  
  
  
      X = np.zeros(batch_shape, dtype=np.float32)
  
  
  
      def style_and_write(count):
  
          for i in range(count, batch_size):
  
              X[i] = X[count]  # Use last frame to fill X
  
          _preds = sess.run(preds, feed_dict={img_placeholder: X})
  
          for i in range(0, count):
  
              video_writer.write_frame(np.clip(_preds[i], 0, 255).astype(np.uint8))
  
  
  
      frame_count = 0  # The frame count that written to X
  
      for frame in video_clip.iter_frames():
  
          X[frame_count] = frame
  
          frame_count += 1
  
          if frame_count == batch_size:
  
              style_and_write(frame_count)
  
              frame_count = 0
  
  
  
      if frame_count != 0:
  
          style_and_write(frame_count)
  
  
  
      video_writer.close()

  I do not expect this to be a repeatable sample as it requires gigabytes of models/checkpoints/etc. to do so.

  Anyways, I am converting .gif’s to .mp4’s using this line of code :

  os.system('echo "y"| ffmpeg -i temp.gif -movflags faststart -pix_fmt yuv420p -vf "scale=trunc(iw/2)*2:trunc(ih/2)*2" temp.mp4')

  and when I run a subsequent .mp4 through the video rendering function, this will sometimes happen :

  original : https://i.imgur.com/WrBa6yw.gifv

  result : https://giphy.com/gifs/dream-bot-BzqB8XILJuVTJcgJnn

  It will happen on certain .mp4’s 100% of the time and on others, 0% of the time. It either happens to a clip or it does not happen to that clip. It is not a case of a single clip sometimes having this problem. If it is good, it is always good but if it’s bad, that clip will never work.

  After this output data from when the clips are processed :

  good gifs
  
  Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 728x728, q=-1--1, 30 fps, 15360 tbn, 30 tbc
  
  frame=  450 fps= 78 q=-1.0 Lsize=    7570kB time=00:00:14.93 bitrate=4152.6kbits/s
  
  
  
  Stream #0:0: Video: gif, bgra, 800x450, 25 fps, 25 tbr, 100 tbn, 100 tbc
  
  Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 728x408, q=-1--1, 23.98 fps, 24k tbn, 23.98 tbc
  
  frame=  360 fps=198 q=-1.0 Lsize=    2568kB time=00:00:14.93 bitrate=1408.8kbits/s 
  
  
  
  Stream #0:0: Video: gif, bgra, 728x408, 23.92 fps, 23.98 tbr, 100 tbn, 100 tbc
  
  Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 728x408, q=-1--1, 23.98 fps, 24k tbn, 23.98 tbc
  
  frame=  360 fps=198 q=-1.0 Lsize=    2568kB time=00:00:14.93 bitrate=1408.8kbits/s 
  
  
  
  bad gifs
  
  Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 800x450, q=-1--1, 25 fps, 12800 tbn, 25 tbc
  
  frame=  150 fps= 87 q=-1.0 Lsize=    1840kB time=00:00:05.92 bitrate=2545.8kbits/s
  
  
  
  Stream #0:0: Video: gif, bgra, 378x275, 25 fps, 25 tbr, 100 tbn, 100 tbc
  
  Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 378x274, q=-1--1, 25 fps, 12800 tbn, 25 tbc
  
  frame=  115 fps=0.0 q=-1.0 Lsize=     253kB time=00:00:04.52 bitrate= 459.4kbits/s

  I have noticed that the frame= value is exactly 15x larger than the .gif fps value while for the bad .gifs, it is not. I believe this is the cause but do not know how to change these values. does anybody know how I can process/convert the gif to .mp4 so that the frame= value is 15x the gif fps ?