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• ffmpeg : mute first 2 seconds in all audio streams

  10 avril 2015, par Tony

  Looking to edit a blip out of the beginning of a video/audio file :

  • How can I use ffmpeg to only edit the first two seconds of the clip so that there’s no longer that blip in the audio ?

  • How do I ensure that all 7 audio tracks are affected by the audio filter ?

  • How do I ensure that all 7 are also present in my output file in the same input specs ?

  Complete output :

  ffmpeg -i ~/Downloads/in.mov  -vcodec copy -acodec pcm_s24le -q:a 0 -af "volume=enable='between(t,0,3)':volume=0"  ~/Downloads/out2.mov
  
  ffmpeg version 2.6.1 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/2.6.1 --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-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
  
  Guessed Channel Layout for  Input Stream #0.1 : mono
  
  Guessed Channel Layout for  Input Stream #0.2 : mono
  
  Guessed Channel Layout for  Input Stream #0.3 : mono
  
  Guessed Channel Layout for  Input Stream #0.4 : mono
  
  Guessed Channel Layout for  Input Stream #0.5 : mono
  
  Guessed Channel Layout for  Input Stream #0.6 : mono
  
  Guessed Channel Layout for  Input Stream #0.7 : stereo
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '~/Downloads/in.mov':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 537199360
  
      compatible_brands: qt  
  
      creation_time   : 2014-01-16 18:02:27
  
    Duration: 00:00:06.44, start: 0.000000, bitrate: 119128 kb/s
  
      Stream #0:0(eng): Video: prores (apch / 0x68637061), yuv422p10le(bt709), 1920x1080, 109843 kb/s, SAR 1:1 DAR 16:9, 29.97 fps, 29.97 tbr, 2997 tbn, 2997 tbc (default)
  
      Metadata:
  
        creation_time   : 2014-01-16 18:02:27
  
        handler_name    : Apple Alias Data Handler
  
        encoder         : Apple ProRes 422 (HQ)
  
        timecode        : 01:00:00;00
  
      Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-01-16 18:02:27
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:2(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-01-16 18:02:27
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:3(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-01-16 18:02:27
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:4(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-01-16 18:02:27
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:5(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-01-16 18:02:27
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:6(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-01-16 18:02:27
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:7(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 2 channels, s32 (24 bit), 2304 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-01-16 18:02:27
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:8(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-01-16 18:02:28
  
        handler_name    : Apple Alias Data Handler
  
        timecode        : 01:00:00;00
  
  File '~/Downloads/out2.mov' already exists. Overwrite ? [y/N] y
  
  Output #0, mov, to '~/Downloads/out2.mov':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 537199360
  
      compatible_brands: qt  
  
      encoder         : Lavf56.25.101
  
      Stream #0:0(eng): Video: prores (apch / 0x68637061), yuv422p10le, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 109843 kb/s, 29.97 fps, 29.97 tbr, 11988 tbn, 2997 tbc (default)
  
      Metadata:
  
        creation_time   : 2014-01-16 18:02:27
  
        handler_name    : Apple Alias Data Handler
  
        encoder         : Apple ProRes 422 (HQ)
  
        timecode        : 01:00:00;00
  
      Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, stereo, s32 (24 bit), 2304 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-01-16 18:02:27
  
        handler_name    : Apple Alias Data Handler
  
        encoder         : Lavc56.26.100 pcm_s24le
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
    Stream #0:7 -> #0:1 (pcm_s24le (native) -> pcm_s24le (native))
  
  Press [q] to stop, [?] for help
  
  frame=  193 fps=109 q=-1.0 Lsize=   88166kB time=00:00:06.43 bitrate=112155.7kbits/s    
  
  video:86349kB audio:1811kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.006946%

• 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.