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• Révision 73214 : Grosse optimisation du temps de calcul de la liste des plugins :

  3 juin 2013, par cedric@yterium.com

  * n’inclure le calcul du detail que si il y a besoin
  * ne pas calculer de miniature des logos et deleguer a CSS le soin de forcer le width
  * mutualiser les tests conditionnels, en particulier sur #AUTORISER
  * par defaut, ne pas calculer le cas des plugins incompatibles. Ils sont d’un usage rare et leur affihcage passe par un rechargement de la page au lieu d’un simple js
  * ne pas afficher les logos sur les plugins incompatibles
  * mutualiser l’affichage de certaines erreur
  -* optimiser le calcul du slogan pour ne eviter de calculer à la fois #SLOGAN et #DESCRIPTION

  En l’absence de plugins incompatibles, réduction du temps de calcul de plus de 50%
  Dans mon cas test en local avec beaucoup de checkout de dossiers plugins et de versions incompatibles, je suis passé de 3.5s à 700ms pour le calcul de la liste.

• How to get stream info from opened file in ffmpeg ?

  31 mai 2013, par Srv19

  I am trying to read video file using ffmpeg. I had working code that corresponded to somewhat old version of it, and started to try and upgrade to latest build version, exchanging all those deprecated functions for their actual analogues.

  However i have run into a problem. No streams seem to be retrieved and the load of video stops dead in tracks.

  here is the code i am using :

     // Open video file
  
     if(avformat_open_input(&pFormatCtx, filename.toStdString().c_str(), NULL, NULL)!=0)
  
         return FILE_NOT_OPENED; // Couldn't open file
  
  
  
     // Retrieve stream information
  
     if(avformat_find_stream_info(pFormatCtx,NULL)<0)
  
         return NO_STREAM_INFO; // Couldn't find stream information
  
  
  
     // Dump information about file onto standard error
  
     av_dump_format(pFormatCtx, 0, filename.toStdString().c_str(), false);
  
  
  
     // Find the first video stream
  
     videoStream=-1;
  
     for(unsigned i=0; inb_streams; i++)
  
         if(pFormatCtx->streams[i]->codec->codec_type==ffmpeg::AVMEDIA_TYPE_VIDEO)
  
         {
  
             videoStream=i;
  
             break;
  
         }
  
     if(videoStream==-1)
  
         return OTHER; // Didn't find a video stream
  
  
  
     // Get a pointer to the codec context for the video stream
  
     pCodecCtx=pFormatCtx->streams[videoStream]->codec;
  
  
  
     // Find the decoder for the video stream
  
     pCodec=avcodec_find_decoder(pCodecCtx->codec_id);
  
     if(pCodec==NULL)
  
         return CODEC_NOT_FOUND; // Codec not found
  
  
  
     // Open codec
  
     if(avcodec_open2(pCodecCtx, pCodec,NULL)<0)
  
         return CODEC_NOT_OPENED; // Could not open codec

  The problem arises in the cycle through video streams in ffmpeg::AVFormatContext *pFormatCtx. nb_streams field is 0, and i never actually enter the cycle, and codec is not loaded etc. Strange thing is, av_dump_format gives following output :

  License: GPL version 3 or later
  
  AVCodec version 3606372
  
  AVFormat configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  
  [asf @ 004e9540] Stream #0: not enough frames to estimate rate; consider increasing probesize
  
  Input #0, asf, from 'C:/Users/Public/Videos/Sample Videos/Wildlife.wmv':
  
    Metadata:
  
      SfOriginalFPS   : 299700
  
      WMFSDKVersion   : 11.0.6001.7000
  
      WMFSDKNeeded    : 0.0.0.0000
  
      comment         : Footage: Small World Productions, Inc; Tourism New Zealand | Producer: Gary F. Spradling | Music: Steve Ball
  
      title           : Wildlife in HD
  
      copyright       : В© 2008 Microsoft Corporation
  
      IsVBR           : 0
  
      DeviceConformanceTemplate: AP@L3
  
    Duration: 00:00:30.09, start: 0.000000, bitrate: 6977 kb/s
  
      Stream #0:0(eng): Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, 2 channels, fltp, 192 kb/s
  
      Stream #0:1(eng): Video: vc1 (Advanced) (WVC1 / 0x31435657), yuv420p, 1280x720, 5942 kb/s, 29.97 tbr, 1k tbn, 1k tbc

  and there are 2 streams, clear as day.

  I am utterly baffled. Please help.

• FFMPEG fails to find any files matching the regexp

  11 avril 2013, par dawe134

  I want to convert sequence of 40 images to a video. The problem is that ffmpeg could not find any of the inputs images matching the regexp in the command. What am I doing wrong please ?

  I ran the following commands :

  > ffmpeg -f image2 -i "img%0d.jpg" -vcodec mpeg4 -y -v "verbose" 07_seq_wire.avi 
  
  *** THIS PROGRAM IS DEPRECATED ***
  
  This program is only provided for compatibility and will be removed in a future release.    Please use avconv instead.
  
  img%0d.jpg: No such file or directory
  
  
  
  
  
  > ls -l
  
  -rw-r--r-- 1 david david  69812 Apr 11 01:54 img01.jpg
  
  -rw-r--r-- 1 david david  70858 Apr 11 01:54 img02.jpg
  
  -rw-r--r-- 1 david david  71481 Apr 11 01:54 img03.jpg
  
  -rw-r--r-- 1 david david  71528 Apr 11 01:54 img04.jpg
  
  -rw-r--r-- 1 david david  71470 Apr 11 01:54 img05.jpg
  
  -rw-r--r-- 1 david david  71534 Apr 11 01:54 img06.jpg
  
  -rw-r--r-- 1 david david  70908 Apr 11 01:54 img07.jpg
  
  -rw-r--r-- 1 david david  70633 Apr 11 01:54 img08.jpg
  
  -rw-r--r-- 1 david david  70059 Apr 11 01:54 img09.jpg
  
  -rw-r--r-- 1 david david  70021 Apr 11 01:54 img10.jpg
  
  -rw-r--r-- 1 david david  69726 Apr 11 01:54 img11.jpg
  
  -rw-r--r-- 1 david david  70896 Apr 11 01:54 img12.jpg
  
  -rw-r--r-- 1 david david  72123 Apr 11 01:54 img13.jpg
  
  -rw-r--r-- 1 david david  72605 Apr 11 01:54 img14.jpg
  
  -rw-r--r-- 1 david david  73501 Apr 11 01:54 img15.jpg
  
  -rw-r--r-- 1 david david  73743 Apr 11 01:54 img16.jpg
  
  -rw-r--r-- 1 david david  74401 Apr 11 01:54 img17.jpg
  
  -rw-r--r-- 1 david david  74697 Apr 11 01:54 img18.jpg
  
  -rw-r--r-- 1 david david  75371 Apr 11 01:54 img19.jpg
  
  -rw-r--r-- 1 david david  74802 Apr 11 01:54 img20.jpg
  
  -rw-r--r-- 1 david david  74802 Apr 11 01:55 img21.jpg
  
  -rw-r--r-- 1 david david  75371 Apr 11 01:55 img22.jpg
  
  -rw-r--r-- 1 david david  74697 Apr 11 01:55 img23.jpg
  
  -rw-r--r-- 1 david david  74401 Apr 11 01:55 img24.jpg
  
  -rw-r--r-- 1 david david  73743 Apr 11 01:55 img25.jpg
  
  -rw-r--r-- 1 david david  73501 Apr 11 01:55 img26.jpg
  
  -rw-r--r-- 1 david david  72605 Apr 11 01:55 img27.jpg
  
  -rw-r--r-- 1 david david  72123 Apr 11 01:55 img28.jpg
  
  -rw-r--r-- 1 david david  70896 Apr 11 01:55 img29.jpg
  
  -rw-r--r-- 1 david david  69726 Apr 11 01:55 img30.jpg
  
  -rw-r--r-- 1 david david  70021 Apr 11 01:55 img31.jpg
  
  -rw-r--r-- 1 david david  70059 Apr 11 01:55 img32.jpg
  
  -rw-r--r-- 1 david david  70633 Apr 11 01:55 img33.jpg
  
  -rw-r--r-- 1 david david  70908 Apr 11 01:55 img34.jpg
  
  -rw-r--r-- 1 david david  71534 Apr 11 01:55 img35.jpg
  
  -rw-r--r-- 1 david david  71470 Apr 11 01:55 img36.jpg
  
  -rw-r--r-- 1 david david  71528 Apr 11 01:55 img37.jpg
  
  -rw-r--r-- 1 david david  71481 Apr 11 01:55 img38.jpg
  
  -rw-r--r-- 1 david david  70858 Apr 11 01:56 img39.jpg
  
  -rw-r--r-- 1 david david  69812 Apr 11 01:56 img40.jpg

  Thanks for any help !