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• Creating video from image using FFMPEG

  27 août 2012, par yashprit

  I am creating video editing application using JavaScript, ffmpeg and java. Using FFMPEG i have created extract n frame of video, than using canvas.toDataUrl I am replacing new image with existing image frame rate and everything has taken care, but when I use these image to create video, FFMPEG never include newly created PNG image.

  code to save png image from HTML5 canvas

  Base64 decoder = new Base64();
  
      byte[] pic = decoder.decodeBase64(request.getParameter("pic"));
  
      String frameCount = request.getParameter("frame");
  
      InputStream in = new ByteArrayInputStream(pic);
  
      BufferedImage bImageFromConvert = ImageIO.read(in);
  
      String outdir = "output\\"+frameCount;
  
      //Random rand = new Random();
  
      File file = new File(outdir);
  
      if(file.isFile()){
  
          if(file.delete()){
  
              File writefile = new File(outdir);
  
              ImageIO.write(bImageFromConvert, "png", file);
  
          }
  
      }

  Code for creating image from video

  String filePath = "D:\\temp\\some.mpg";
  
      String outdir = "output";
  
      File file = new File(outdir);
  
      file.mkdirs();
  
      Map m = System.getenv();
  
  
  
      /*
  
       * String command[] =
  
       * {"D:\\ffmpeg-win32-static\\bin\\ffmpeg","-i",filePath
  
       * ,"-r 30","-f","image2",outdir,"\\user%03d.jpg"};
  
       * 
  
       * ProcessBuilder pb = new ProcessBuilder(command); pb.start();
  
       */
  
      String commands = "D:\\ffmpeg-win32-static\\bin\\ffmpeg -i " + filePath
  
              + " -r 30  -f image2 " + outdir + "\\image%05d.png";
  
      Process p = Runtime.getRuntime().exec(commands);

  code for creating video from image

  String filePath = "output";
  
      File fileP = new File(filePath);
  
      String commands = "D:\\ffmpeg-win32-static\\bin\\ffmpeg -f image2 -i "
  
              + fileP + "\\image%5d.png " + fileP + "\\video.mp4";
  
      System.out.println(commands);
  
      Runtime.getRuntime().exec(commands);
  
      System.out.println(fileP.getAbsolutePath());

• ffmpeg mp3 conversion

  24 août 2012, par Alex

  was to convert several thousand MP3 files, and get this for some files :
  ffmpeg -t 45 -i "my_mp3.mp3" -y "new_mp3.mp3"
  FFmpeg version 0.5-svn17737+3:0.svn20090303-1ubuntu6, Copyright (c) 2000-2009 Fabrice Bellard, et al.
  configuration : —enable-gpl —enable-postproc —enable-swscale —enable-x11grab —extra-version=svn17737+3:0.svn20090303-1ubuntu6 —prefix=/usr —enable-avfilter —enable-avfilter-lavf —enable-libgsm —enable-libschroedinger —enable-libspeex —enable-libtheora —enable-libvorbis —enable-pthreads —disable-stripping —disable-vhook —enable-libdc1394 —disable-armv5te —disable-armv6 —disable-armv6t2 —disable-armvfp —disable-neon —disable-altivec —disable-vis —enable-shared —disable-static
  libavutil 49.15. 0 / 49.15. 0
  libavcodec 52.20. 0 / 52.20. 0
  libavformat 52.31. 0 / 52.31. 0
  libavdevice 52. 1. 0 / 52. 1. 0
  libavfilter 0. 4. 0 / 0. 4. 0
  libswscale 0. 7. 1 / 0. 7. 1
  libpostproc 51. 2. 0 / 51. 2. 0
  built on Apr 10 2009 23:18:41, gcc : 4.3.3
  my_mp3.mp3 : could not find codec parameters

  what could be the problem ?

• FFmpeg and Ruby linkage

  9 août 2012, par Thomas Kobber Panum

  I'm getting this error :

  Failed encoding. Errors: no output file created. Full output: dyld: Library not loaded: /usr/local/lib/libogg.0.dylib
  
   Referenced from: /usr/local/bin/ffmpeg
  
   Reason: Incompatible library version: ffmpeg requires version 9.0.0 or later, but libogg.0.dylib provides version 6.0.0

  I've installed ffmpeg through brew, and installed both the 'ffmpeg' gem and the 'streamio-ffmpeg' gem.

  Running :

  otool -L /usr/local/lib/libogg.0.dylib

  gives me this output :

  /usr/local/lib/libogg.0.dylib:
  
      /usr/local/lib/libogg.0.dylib (compatibility version 9.0.0, current version 9.0.0)
  
      /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 159.1.0)

  The file I'm using ffmpeg in, looks like this :

  # lib/carrierwave/ffmpeg.rb
  
  require 'streamio-ffmpeg'
  
  module CarrierWave
  
    module FFMPEG
  
      module ClassMethods
  
        def resample( bitrate )
  
          process :resample => bitrate
  
        end
  
      end
  
  
  
      def resample( bitrate )
  
        directory = File.dirname( current_path )
  
        tmpfile   = File.join( directory, "tmpfile" )
  
  
  
        FileUtils.mv( current_path, tmpfile )
  
  
  
        file = ::FFMPEG::Movie.new(tmpfile)
  
        file.transcode( current_path, :audio_bitrate => bitrate)
  
  
  
        File.delete( tmpfile )
  
      end
  
    end
  
  end