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• on2avc : check number of channels

  4 octobre 2014, par Michael Niedermayer

  on2avc : check number of channels
  Fixes invalid memory access.
  CC : libav-stable@libav.org
  
  Bug-ID : CVE-2014-8549
  
  Found-by : Mateusz "j00ru" Jurczyk and Gynvael Coldwind
  
  Signed-off-by : Anton Khirnov <anton@khirnov.net>
  

  • [DH] libavcodec/on2avc.c

• Convert video to animated GIF with FFmpeg [migrated]

  5 janvier 2014, par flexage

  I have FFmpeg installed and working on my Ubuntu 12.04 LTS Server.

  I have managed to successfully automate the process of uploading a video and converting it to both H264/MP4 and OGV for display on the web.

  I also wanted to generate an animated GIF thumbnail for the video.

  I have got as far as the following, which I'm pretty sure is generating 2 frames a second for the first 10 seconds of the video :

  /usr/local/bin/ffmpeg -i "$3/uploads/video-queue/$1.$2" -vf scale=320:-1 -t 10 -r 2 "$3/uploads/video-queue/processing/$1.gif"

  What I would prefer to do is generate 1 frame every 25 seconds for the duration of the entire video, but also with a maximum number of frames set as something like 50 frames.

  I would prefer not to have dependencies on other components such as Image Magik, and I would like to keep this purely shell based.

  Thanks in advance ! You guys are way smarter than me for sure !

  Here is the complete console output from an ffmpeg run of the command above :

  root@ubuntu:/home/fckster/etc/php5# /home/fckster/public_html/cronscripts/process-video-gif.sh 1-1388841621 wmv /home/fckster/public_html
  
  ffmpeg version N-59480-g8feaa83-syslint Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Jan  2 2014 00:32:20 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
  
    configuration: --prefix=/usr/local/cpffmpeg --enable-shared --enable-nonfree --enable-gpl --enable-pthreads --enable-libopencore-amrnb --enable-decoder=liba52 --enable-libopencore-amrwb --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --extra-cflags=-I/usr/local/cpffmpeg/include/ --extra-ldflags=-L/usr/local/cpffmpeg/lib --enable-version3 --extra-version=syslint
  
    libavutil      52. 59.100 / 52. 59.100
  
    libavcodec     55. 47.100 / 55. 47.100
  
    libavformat    55. 22.102 / 55. 22.102
  
    libavdevice    55.  5.102 / 55.  5.102
  
    libavfilter     4.  0.103 /  4.  0.103
  
    libswscale      2.  5.101 /  2.  5.101
  
    libswresample   0. 17.104 /  0. 17.104
  
    libpostproc    52.  3.100 / 52.  3.100
  
  [wmv3 @ 0x24dd680] Extra data: 8 bits left, value: 0
  
  Guessed Channel Layout for  Input Stream #0.1 : stereo
  
  Input #0, asf, from '/home/fckster/public_html/uploads/video-queue/1-1388841621.wmv':
  
    Metadata:
  
      WM/ToolName     : Flip4Mac WMV Export Component for QuickTime (Mac)
  
      WM/ToolVersion  : 2204
  
      encoder         : Lavf54.29.104
  
    Duration: 00:01:11.30, start: 0.140000, bitrate: 2096 kb/s
  
      Stream #0:0: Video: wmv3 (Main) (WMV3 / 0x33564D57), yuv420p, 1280x720, 29.97 tbr, 1k tbn, 1k tbc
  
      Stream #0:1: Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, stereo, fltp, 48 kb/s
  
  [wmv3 @ 0x24dd680] Extra data: 8 bits left, value: 0
  
  Output #0, gif, to '/home/fckster/public_html/uploads/video-queue/processing/1-1388841621.gif':
  
    Metadata:
  
      WM/ToolName     : Flip4Mac WMV Export Component for QuickTime (Mac)
  
      WM/ToolVersion  : 2204
  
      encoder         : Lavf55.22.102
  
      Stream #0:0: Video: gif, pal8, 320x180, q=2-31, 200 kb/s, 100 tbn, 10 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (wmv3 -> gif)
  
  Press [q] to stop, [?] for help
  
  frame=   87 fps= 52 q=0.0 Lsize=    2131kB time=00:00:10.00 bitrate=1745.9kbits/s dup=0 drop=170    
  
  video:2219kB audio:0kB subtitle:0 global headers:0kB muxing overhead -3.939009%

• Pipe series of images from java application to ffmpeg subprocess

  20 juin 2014, par Marco

  I am looking for a way to stream series of images (jpegs) from java application into FFMpeg STDIN pipe.
  FFMpeg should process these images and create a video file as an output.

  FFMpeg is executed as sub process of java application with the following command "ffmpeg.exe -i pipe:0 out.avi"

  When i run "ffmpeg -i input.jpg out.avi" command in the console, i get the "out.avi" file as expected

  But when i use the following tester code in my java application, i got an error.

  Code in Java application :

  File ffmpeg_output_msg = new File("ffmpeg_output_msg.txt");
  
  ProcessBuilder pb = new ProcessBuilder(
  
          "ffmpeg.exe","-i","pipe:0","out.avi");
  
  pb.redirectErrorStream(true);
  
  pb.redirectOutput(ffmpeg_output_msg);
  
  pb.redirectInput(ProcessBuilder.Redirect.PIPE);
  
  Process p = pb.start();
  
  OutputStream ffmpegInput = p.getOutputStream();
  
  
  
  byte[] image;
  
  File file = new File("input.jpg");
  
  image = new byte[(int)file.length()];
  
  
  
  FileInputStream fileInputStream = new FileInputStream(file);
  
  fileInputStream.read(image);
  
  
  
  ImageInputStream iis = ImageIO.createImageInputStream(
  
          new ByteArrayInputStream(image));
  
  BufferedImage img = ImageIO.read(iis);
  
  
  
  ImageIO.write(img, "JPEG", ffmpegInput);

  FFMpeg output :

  ffmpeg version N-59664-g94cf4f8 Copyright (c) 2000-2014 the FFmpeg developers built on Jan 7 2014 22:07:02 with gcc 4.8.2 (GCC)
  configuration : —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-libvidstab —enable-libvo-aacenc —enable-libvo-amrwbenc —enable-libvorbis —enable-libvpx —enable-libwavpack —enable-libx264 —enable-libxavs —enable-libxvid —enable-zlib

  libavutil      52. 62.100 / 52. 62.100
  
  libavcodec     55. 47.100 / 55. 47.100
  
  libavformat    55. 22.102 / 55. 22.102
  
  libavdevice    55.  5.102 / 55.  5.102
  
  libavfilter     4.  0.103 /  4.  0.103
  
  libswscale      2.  5.101 /  2.  5.101
  
  libswresample   0. 17.104 /  0. 17.104
  
  libpostproc    52.  3.100 / 52.  3.100

  pipe: : Invalid data found when processing input

  Any ideas how to make it work ?

  Thank you very much for your time.