Recherche avancée

Sur d’autres sites (8472)

• FFmpeg meaningful video thumbnails

  18 avril 2015, par Maverick

  I know this question has been discussed already here. However, it did not solve the problem completely. I trying to retrieve meaning thumbnails from video and while executing the following command.

  ffmpeg -ss 3 -i input.avi -vf "select=gt(scene\,0.4)" -frames:v 5 -vsync vfr -vf "fps=fps=1/600" out%02d.jpg

  As a result, I am only able to get 1 image out of this video. I am not sure, what is going wrong over here.

  Also, it would be great, if someone kindly give a quick explanation of this command parameters and filters. The command originally comes from here

  FFMPEG console output :

  ffmpeg version 2.6 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with Apple LLVM version 6.0 (clang-600.0.57) (based on LLVM 3.5svn)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/2.6 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-libfreetype --enable-libtheora --enable-libvorbis --enable-libvpx --enable-librtmp --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libass --enable-ffplay --enable-libspeex --enable-libschroedinger --enable-libfdk-aac --enable-libopus --enable-frei0r --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-cflags='-I/usr/local/Cellar/openjpeg/1.5.1_1/include/openjpeg-1.5 ' --enable-nonfree --enable-vda
  
    libavutil      54. 20.100 / 54. 20.100
  
    libavcodec     56. 26.100 / 56. 26.100
  
    libavformat    56. 25.101 / 56. 25.101
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 11.102 /  5. 11.102
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Input #0, avi, from 'tagesschau.avi':
  
    Metadata:
  
      encoder         : Lavf56.25.101
  
    Duration: 00:00:20.03, start: 0.000000, bitrate: 4357 kb/s
  
      Stream #0:0: Video: mpeg4 (Simple Profile) (xvid / 0x64697678), yuv420p, 720x540 [SAR 1:1 DAR 4:3], 4190 kb/s, 29.97 fps, 29.97 tbr, 29.97 tbn, 29.97 tbc
  
      Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 44100 Hz, stereo, fltp, 160 kb/s
  
  [swscaler @ 0x7fcb2a00f600] deprecated pixel format used, make sure you did set range correctly
  
  [mjpeg @ 0x7fcb2a803c00] bitrate tolerance 4000000 too small for bitrate 200000, overriding
  
  Output #0, image2, to 'out%02d.jpg':
  
    Metadata:
  
      encoder         : Lavf56.25.101
  
      Stream #0:0: Video: mjpeg, yuvj420p(pc), 720x540 [SAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 0k fps, 0k tbn, 0k tbc
  
      Metadata:
  
        encoder         : Lavc56.26.100 mjpeg
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mpeg4 (native) -> mjpeg (native))
  
  Press [q] to stop, [?] for help
  
  frame=    1 fps=0.0 q=6.9 Lsize=N/A time=00:10:00.00 bitrate=N/A    
  
  video:44kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown 

• ffmpeg not working on Asp.net MVC

  9 avril 2015, par Faisal Mq

  I am using ffmpeg to extract thumbnails from video files and also to get their durations.
  The code works absolutely fine in Console Application, but when I use it on Asp.Net MVC 3, it does not work at all.

  I have placed ffmpeg.exe file on my application’s root folder and set its property "Copy to Output Directory" to "Copy Always"

  ffmpeg file gets placed in my application’s Bin folder after that I compile my project but it is not doing anything. It does not give me any error but also does not giving me my intended results, which are otherwise working absolutely fine in a Console application.

  [NOTE] In QuickWatch when I see the value for "output" on statement :

  string output = SROutput.ReadToEnd();

  ffmpeg shows me following output but this output does not include Duration info like it does in Console application.

  ffmpeg version N-69422-gf5722ba Copyright (c) 2000-2015 the FFmpeg developers
  
    built on Jan 30 2015 22:13:10 with gcc 4.9.2 (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-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --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-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib
  
    libavutil      54. 18.100 / 54. 18.100
  
    libavcodec     56. 21.101 / 56. 21.101
  
    libavformat    56. 19.100 / 56. 19.100
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5.  9.102 /  5.  9.102
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  3.100 / 53.  3.100

  I am pasting here the code that I am using just to get the duration of a media file using ffmpeg.

  private static TimeSpan GetVideoDurationByFFMPEG(string ffmpegPath, string filepath)
  
          {
  
              string param = string.Format("-i \"{0}\"", filepath);
  
  
  
              System.Text.RegularExpressions.Regex re = null;
  
              System.Text.RegularExpressions.Match m = null;
  
              TimeSpan Duration = new TimeSpan();
  
  
  
              //Get ready with ProcessStartInfo
  
              ProcessStartInfo oInfo = new ProcessStartInfo(ffmpegPath, param);
  
              oInfo.CreateNoWindow = true;
  
  
  
              //ffMPEG uses StandardError for its output.
  
              oInfo.RedirectStandardError = true;
  
              oInfo.WindowStyle = ProcessWindowStyle.Hidden;
  
              oInfo.UseShellExecute = false;
  
  
  
              // Lets start the process
  
  
  
              Process mProcess = Process.Start(oInfo);
  
  
  
              // Divert output
  
              StreamReader SROutput = mProcess.StandardError;
  
  
  
              // Read all
  
              string output = SROutput.ReadToEnd();
  
  
  
              //get duration
  
  
  
              re = new System.Text.RegularExpressions.Regex("[D|d]uration:.((\\d|:|\\.)*)");
  
              m = re.Match(output);
  
  
  
              if (m.Success)
  
              {
  
                  //Means the output has cantained the string "Duration"
  
                  string temp = m.Groups[1].Value;
  
                  string[] timepieces = temp.Split(new char[] { ':', '.' });
  
                  if (timepieces.Length == 4)
  
                  {
  
  
  
                      // Store duration
  
                      Duration = new TimeSpan(0, Convert.ToInt16(timepieces[0]), Convert.ToInt16(timepieces[1]), Convert.ToInt16(timepieces[2]), Convert.ToInt16(timepieces[3]));
  
                  }
  
              }
  
  
  
              mProcess.Close();
  
  
  
              return Duration;
  
          }

  Please someone guide me where I am getting wrong.

• Error in ffmpeg conversion

  9 avril 2015, par Adam Mo.

  I have a VPS 1G RAM with CentOS 6 i386 minimal installed and installed ffmpeg by ffmpeginstaller.com to setup clipbucket 2.7 in the VPS.
  when I test the ffmpeg by this command :

  wget "http://mirrorblender.top-ix.org/peach/bigbuckbunny_movies/big_buck_bunny_720p_surround.avi"
  
  ffmpeg -i big_buck_bunny_720p_surround.avi -vcodec libx264 big_buck_bunny_720p_surround-H264.avi

  by following this tutorial I get error
  the output :

  ffmpeg version N-71343-g32e06c4-syslint Copyright (c) 2000-2015 the FFmpeg     developers
  
    built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-11)
  
    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      54. 22.101 / 54. 22.101
  
    libavcodec     56. 34.100 / 56. 34.100
  
    libavformat    56. 30.100 / 56. 30.100
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 13.101 /  5. 13.101
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Input #0, avi, from 'big_buck_bunny_720p_surround.avi':
  
    Metadata:
  
      encoder         : AVI-Mux GUI 1.17.7, Aug  8 2006  20:59:17
  
      JUNK            :
  
    Duration: 00:09:56.46, start: 0.000000, bitrate: 4456 kb/s
  
      Stream #0:0: Video: mpeg4 (Simple Profile) (FMP4 / 0x34504D46), yuv420p,     1280x720 [SAR 1:1 DAR 16:9], 4001 kb/s, 24 fps, 24 tbr, 24 tbn, 24 tbc
  
      Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, 5.1(side), fltp, 448 kb/s
  
      Metadata:
  
        title           : BBB-Master
  
  [libx264 @ 0x9360de0] using SAR=1/1
  
  [libx264 @ 0x9360de0] using cpu capabilities: none!
  
  x264 [error]: malloc of size 5258784 failed
  
  Output #0, avi, to 'big_buck_bunny_720p_surround-H264.avi':
  
    Metadata:
  
      encoder         : AVI-Mux GUI 1.17.7, Aug  8 2006  20:59:17
  
      JUNK            :
  
      Stream #0:0: Video: h264, none, q=2-31, 128 kb/s, SAR 1:1 DAR 0:0, 24 fps
  
      Metadata:
  
        encoder         : Lavc56.34.100 libx264
  
      Stream #0:1: Audio: mp3, 0 channels, 128 kb/s
  
      Metadata:
  
        title           : BBB-Master
  
        encoder         : Lavc56.34.100 libmp3lame
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mpeg4 (native) -> h264 (libx264))
  
    Stream #0:1 -> #0:1 (ac3 (native) -> mp3 (libmp3lame))
  
  Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

  I don’t know what the problem, can any one help me ?