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• Evolution #3775 : Moins de cookies

  26 avril 2016, par jluc -

  Ça concerne gandi à l’origine, mais en ayant une politique pâtissière plus "générique", SPIP aura a priori plus de chance de bénéficier des varnish d’un plus grand nombre d’hébergeurs.

• ffmpeg how mkv to mp4 with attachment in subtitle [closed]

  17 juillet 2022, par SoonHiru

  i have trouble,,
how re-encode MKV to MP4 with attachment font in substitles, before im muxing font using mkvmerge

  


  
Stream #0:0 : Video : h264 (High), yuv420p(tv, bt709, progressive), 848x480 [SAR 160:159 DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn (default)
    Metadata :
      ENCODER : Lavc58.134.100 libx264
      BPS : 266289
      DURATION : 00:23:40.044000000
      NUMBER_OF_FRAMES : 34047
      NUMBER_OF_BYTES : 47267933
      _STATISTICS_WRITING_APP : mkvmerge v68.0.0 ('The Curtain') 64-bit
      _STATISTICS_WRITING_DATE_UTC : 2022-07-15 20:06:26
      _STATISTICS_TAGS : BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
  Stream #0:1(jpn) : Audio : aac (LC), 44100 Hz, stereo, fltp (default)
    Metadata :
      BPS : 128000
      DURATION : 00:23:40.108000000
      NUMBER_OF_FRAMES : 61159
      NUMBER_OF_BYTES : 22721748
      _STATISTICS_WRITING_APP : mkvmerge v68.0.0 ('The Curtain') 64-bit
      _STATISTICS_WRITING_DATE_UTC : 2022-07-15 20:06:26
      _STATISTICS_TAGS : BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
  Stream #0:2(ind) : Subtitle : ass (default) (forced)
    Metadata :
      BPS : 1126
      DURATION : 00:23:30.250000000
      NUMBER_OF_FRAMES : 1596
      NUMBER_OF_BYTES : 198591
      _STATISTICS_WRITING_APP : mkvmerge v68.0.0 ('The Curtain') 64-bit
      _STATISTICS_WRITING_DATE_UTC : 2022-07-15 20:06:26
      _STATISTICS_TAGS : BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
  Stream #0:3 : Attachment : none
    Metadata :
      filename : ABELBECKER-LIGHT_0.TTF
      mimetype : font/ttf
      title : Imported font from sha202.ass
  Stream #0:4 : Attachment : none
    Metadata :
      filename : Leander_0.ttf
      mimetype : font/ttf
      title : Imported font from sha202.ass
  Stream #0:5 : Attachment : none
    Metadata :
      filename : OvertheRainbowFlipped_0.ttf
      mimetype : font/ttf
      title : Imported font from sha202.ass
  Stream #0:6 : Attachment : none
    Metadata :
      filename : QlassikBold_TB - Copy_0_0.ttf
      mimetype : font/otf
      title : Imported font from sha202.ass
Unsupported codec with id 0 for input stream 3
Unsupported codec with id 0 for input stream 4
Unsupported codec with id 0 for input stream 5
Unsupported codec with id 0 for input stream 6


  


  I try using script

  


  ffmpeg -i input.mkv -vf subtitles=input.mkv output.mp4


  


  when finished, only the subtitles, not with attachments fonts

  


• Brute Force Dimensional Analysis

  15 juillet 2010, par Multimedia Mike — Game Hacking, Python

  I was poking at the data files of a really bad (is there any other kind ?) interactive movie video game known simply by one letter : D. The Sega Saturn version of the game is comprised primarily of Sega FILM/CPK files, about which I wrote the book. The second most prolific file type bears the extension ’.dg2’. Cursory examination of sample files revealed an apparently headerless format. Many of the video files are 288x144 in resolution. Multiplying that width by that height and then doubling it (as in, 2 bytes/pixel) yields 82944, which happens to be the size of a number of these DG2 files. Now, if only I had a tool that could take a suspected raw RGB file and convert it to a more standard image format.

  Here’s the FFmpeg conversion recipe I used :

   ffmpeg -f rawvideo -pix_fmt rgb555 -s 288x144 -i raw_file -y output.png
  

  So that covers the files that are suspected to be 288x144 in dimension. But what about other file sizes ? My brute force approach was to try all possible dimensions that would yield a particular file size. The Python code for performing this operation is listed at the end of this post.

  It’s interesting to view the progression as the script compresses to different sizes :

  
  
  

  That ’D’ is supposed to be red. So right away, we see that rgb555(le) is not the correct input format. Annoyingly, FFmpeg cannot handle rgb555be as a raw input format. But this little project worked well enough as a proof of concept.

  If you want to toy around with these files (and I know you do), I have uploaded a selection at : http://multimedia.cx/dg2/.

  Here is my quick Python script for converting one of these files to every acceptable resolution.

  work-out-resolution.py :
  

  PLAIN TEXT

  PYTHON :

  1. # !/usr/bin/python
  2.  
  3. import commands
  4. import math
  5. import os
  6. import sys
  7.  
  8. FFMPEG = "/path/to/ffmpeg"
  9.  
  10. def convert_file(width, height, filename) :
  11.  outfile = "%s-%dx%d.png" % (filename, width, height)
  12.  command = "%s -f rawvideo -pix_fmt rgb555 -s %dx%d -i %s -y %s" % (FFMPEG, width, height, filename, outfile)
  13.  commands.getstatusoutput(command)
  14.  
  15. if len(sys.argv) <2 :
  16.  print "USAGE : work-out-resolution.py <file>"
  17.  sys.exit(1)
  18.  
  19. filename = sys.argv[1]
  20. if not os.path.exists(filename) :
  21.  print filename + " does not exist"
  22.  sys.exit(1)
  23.  
  24. filesize = os.path.getsize(filename) / 2
  25.  
  26. limit = int(math.sqrt(filesize)) + 1
  27. for i in xrange(1, limit) :
  28.  if filesize % i == 0 and filesize & 1 == 0 :
  29.   convert_file(i, filesize / i, filename)
  30.   convert_file(filesize / i, i, filename)