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• How to enable different components of FFMPEG ?

  3 décembre 2011, par Richard77

  I've found this C# wrapper code around FFMPEG. I'm using ASP.NET MVC3 and C#. When trying to get it work, I'm getting the following error :

          RawOutput   "ffmpeg version N-34906-g4e7b3ef, Copyright (c) 2000-2011
  
          the FFmpeg developers
  
  
  
          built on Nov 16 2011 12:35:07 with gcc 4.6.2
  
  
  
          configuration: --enable-gpl --enable-version3 --disable-w32threads 
  
          --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r 
  
          --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype 
  
          --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-librtmp 
  
          --enable-libschroedinger --enable-libspeex --enable-libtheora 
  
          --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis 
  
          --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid 
  
          --enable-zlib
  
  
  
          libavutil    51. 25. 0 / 51. 25. 0
  
          libavcodec   53. 34. 0 / 53. 34. 0 
  
          libavformat  53. 20. 0 / 53. 20. 0 
  
          libavdevice  53.  4. 0 / 53.  4. 0  
  
          libavfilter   2. 48. 1 /  2. 48. 1 
  
          libswscale    2.  1. 0 /  2.  1. 0 
  
          libpostproc  51.  2. 0 / 51.  2. 0
  
          [wmv3 @ 002BFA00] Extra data: 8 bits left, value: 0
  
          [asf @ 002B8A80] parser not found for codec wmav2, packets or times may be invalid.
  
          Seems stream 1 codec frame rate differs from container frame rate: 1000.00 (1000/1) -> 30.00 (30/1)
  
          Input #0, asf, from 'C:\\FfMpeg\\Videos\\Original\\Video1.wmv':
  
          Metadata:
  
          WMFSDKVersion   : 11.0.6002.18049   
  
          WMFSDKNeeded    : 0.0.0.0000
  
          IsVBR           : 0
  
          Duration: 00:00:41.80, start: 0.000000, bitrate: 888 kb/s
  
          Stream #0:0(eng): Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, 2 channels, s16, 64 kb/s
  
          Stream #0:1(eng): Video: wmv3 (Main) (WMV3 / 0x33564D57), yuv420p, 320x240, 786 kb/s, 30 tbr, 1k tbn, 1k tbc
  
          Incompatible pixel format 'yuv420p' for codec 'mjpeg', auto-selecting format 'yuvj420p'
  
          [buffer @ 031D8DA0] w:320 h:240 pixfmt:yuv420p tb:1/1000000 sar:0/1 sws_param:
  
          [buffersink @ 031D8FA0] auto-inserting filter 'auto-inserted scale 0' between the filter 'src' and the filter 'out'
  
          [scale @ 03106C20] w:320 h:240 fmt:yuv420p -> w:320 h:240 fmt:yuvj420p flags:0x4
  
          [wmv3 @ 002BFA00] Extra data: 8 bits left, value: 0
  
          Output #0, image2, to '87334ed0-2bcf-4be5-82ae-9089c14e0323.jpg':
  
          Metadata:
  
          WMFSDKVersion   : 11.0.6002.18049
  
          WMFSDKNeeded    : 0.0.0.0000
  
          IsVBR           : 0
  
          encoder         : Lavf53.20.0
  
          Stream #0:0(eng): Video: mjpeg, yuvj420p, 320x240, q=2-31, 200 kb/s, 90k tbn, 30 tbc
  
          Stream mapping:
  
          Stream #0:1 -> #0:0 (wmv3 -> mjpeg)
  
          Press [q] to stop, [?] for help
  
          [image2 @ 03107920] Could not open file : 87334ed0-2bcf-4be5-82ae-9089c14e0323.jpg
  
          av_interleaved_write_frame(): Input/output error
  
          "   string

  I'm absolutely new to FFMPEG, so I don't know where to start to solve the above probleme.

  EDIT

  public ActionResult Convert()
  
      {
  
          Converter _converter = new Converter(@"C:\FfMpeg\ffmpeg.exe");
  
          OutputPackage oo = _converter.ConvertToFLV(@"C:\FfMpeg\Videos\Original\Video1.wmv");
  
  
  
          FileStream outStream = System.IO.File.OpenWrite(@"C:\FfMpeg\Videos\Converted\Video1.flv");
  
          oo.VideoStream.WriteTo(outStream);
  
          outStream.Flush();
  
          outStream.Close();
  
  
  
          oo.PreviewImage.Save(@"C:\FfMpeg\Videos\Thumbnail\Thumbnail1.jpg");
  
  
  
          return RedirectToAction("WatchMovie");
  
      }

  Thanks for helping

• What do big video companies use to transcode video ? [on hold]

  26 juin 2013, par jays

  I'm reading about video transcoders, and it seems that every open source project out there uses ffmpeg as a backend.

  I'm curious as to what big companies like youtube and justin.tv use to transcode video on such a large scale, since ffmpeg can be a bit of a CPU/memory hog. Or is ffmpeg about as good performance as you can get ?

• Converting image format to jpeg using ffmpeg [migrated]

  12 juin 2013, par user931392

  Before I ask I want to say that I know about ImageMagick and the other image processing tools but I explicitly need to use ffmpeg.

  So, can someone tell me if there's a way to use ffmpeg to convert an image ( in any of the common formats ) to a jpeg format. I also need to scale it. Until now I've come with this :

  ffmpeg -i  -vf "scale=:-1"

  Any suggestion will be appreciated : )