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• Using FFMPEG to create animated GIF from series of images and insert text for each image

  11 janvier 2021, par mwcmwc

  I am generating an animated gif from a series of png's labeled img_00.png, img_01.png, etc. I want to insert text to the top right corner of the animated gif for each frame that is generated from the png to display some specific information. For example say I have 3 pngs, img_00, img_01, and img_02...what I want from the gif is :

  


  For frame generated from img_00, display "This is from img_00".
For frame generated from img_01, display "This is from img_01".
For frame generated from img_02, display "This is the last image generated from img_02 !".

  


  So far I have been messing around with drawtext option (assuming framerate=1) :

  


  ffmpeg -f image2 -framerate 1 -i img_%02d.png -filter_complex "drawtext=enable='between(t,0,1)':text='word1':fontsize=24:fontcolor=white:x=w-tw:y=0,drawtext=enable='between(t,1,2)':text='word2':fontsize=24:fontcolor=white:x=w-tw:y=0" out.gif


  


  But I am getting "word1" and "word2" overlapped on top of each other. Is there a better way of doing this or someway to fix drawtext so the overlap doesn't happen ?

  


• Two Pass encoding FFMpeg C/C++

  21 mai 2018, par Carmine Spizuoco

  From different days I’m trying to implement the two pass encoding h264 in ffmpeg without success. I understand that in the first pass I need to create a text file with the statistics that are in stats_out. This step is realized internally from ffmpeg, so I need set the first pass and have the data in stats_out and after I need go to pass 2.

  For now I’m trying to activate the pass 1 in different way adding the flag in the codecContext :

  CodecCtx->flags |= AV_CODEC_FLAG_PASS1;

  and/or set the option before the creation of context :

  av_opt_set(CodecCtx, "pass", "1", 0);

  but in any way i have the same result, stats_out is always (null).

  Also in the investigation i discovery this FF_API_STATS_BIT that seems to be deprecated :

  if FF_API_STAT_BITS

  /* statistics, used for 2-pass encoding */
  
  attribute_deprecated
  
  int mv_bits;
  
  attribute_deprecated
  
  int header_bits;
  
  attribute_deprecated
  
  int i_tex_bits;
  
  attribute_deprecated
  
  int p_tex_bits;
  
  attribute_deprecated
  
  int i_count;
  
  attribute_deprecated
  
  int p_count;
  
  attribute_deprecated
  
  int skip_count;
  
  attribute_deprecated
  
  int misc_bits;
  
  
  
  /** @deprecated this field is unused */
  
  attribute_deprecated
  
  int frame_bits;

  endif

  So there is i little bit of ambiguity on how to realize this process and the relative posts are too old and not very usefull.

  There is anyone that had experience on it ?

• Revision 44299 : On ajoute un attribut "class" sur les paramètres d’un élément de menu ...

  8 février 2011, par kent1@… — Log

  On ajoute un attribut "class" sur les paramètres d’un élément de menu permettant par exemple d’ajouter multilang qui permet d’avoir "multilang" fonctionnel sur une entrée de menu et ainsi pouvoir le traduire facilement
  essai sur texte_libre
  On incrémente à nouveau la version