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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

• logos and subtitles in reverse using ffmpeg and OpenGL in iOS 5.0

  6 février 2012, par resident_

  I am using ffmpeg to play video on iOS 5.0. In my app with ffmpeg decoded video frames and use OpenGL to display it.

  But I have a problem I don't resolve it. Chains logos and subtitles of the video image is displayed in reverse. I think that is the problem of rendering OpenGL 2.0 or ffmpeg decoded.

  Can you tell me what is wrong ?, and How I can fix it ?

  Very thanks,

  Edit : I change my prepareTExture method with this :

  - (void) prepareTextureW: (GLuint) texW textureHeight: (GLuint) texH frameWidth: (GLuint) frameW frameHeight: (GLuint) frameH {
  
  
  
  float aspect = (float)frameW/(float)frameH;
  
  float minX=-1.f, minY=-1.f, maxX=1.f, maxY=1.f;
  
  float scale ;
  
  if(aspect>=(float)backingHeight/(float)backingWidth){
  
      // Aspect ratio will retain width.
  
      scale = (float)backingHeight / (float) frameW;
  
      maxY = ((float)frameH * scale) / (float) backingWidth;
  
      minY = -maxY;
  
  } else {
  
      // Retain height.
  
      scale = (float) backingWidth / (float) frameW;
  
      maxX = ((float) frameW * scale) / (float) backingHeight;
  
      minX = -maxX;
  
  }
  
  if(frameTexture) glDeleteTextures(1, &frameTexture);
  
  glEnable(GL_TEXTURE_2D);
  
  glGenTextures(1, &frameTexture);
  
  glBindTexture(GL_TEXTURE_2D, frameTexture);
  
  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
  
  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
  
  glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
  
  glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
  
  glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, texW, texH, 0, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, NULL);          
  
  
  
  
  
   verts[0] = maxX;           
  
    verts[1] = maxY;
  
    verts[2] = minX;      
  
    verts[3] = maxY;
  
    verts[4] = maxX;  
  
    verts[5] = minY;
  
    verts[6] = minX;    
  
    verts[7] = minY;
  
  
  
  float s = (float) frameW / (float) texW;
  
  float t = (float) frameH / (float) texH;             
  
  
  
  texCoords[0] = 0.f;        texCoords[1] = 1.f;
  
  texCoords[2] = 1;          texCoords[3] = 1.f;
  
  texCoords[4] = 0.f;        texCoords[5] =0;
  
  texCoords[6] = 1;          texCoords[7] =0;
  
  
  
  mFrameH = frameH;
  
  mFrameW = frameW;
  
  mTexH = texH;
  
  mTexW = texW;
  
  maxS = s;
  
  maxT = t;
  
  
  
  // Just supporting one rotation direction, landscape left.  Rotate Z by 90 degrees.
  
  matSetRotZ(&rot,M_PI_2);
  
  
  
  matMul(&mvp, &rot, &rot);
  
  [self setupShader];    

  }

  And now this is my result : link image

• dashjs can't find initialization segment on manifest.mpd

  30 avril 2016, par Abelardo Mendoza

  I am following this tutorial to stream a WebM. I have no issues running the ffmpeg commands to generate the videos/audio/manifest files but when I try to run it locally, there’s no video or audio at all and dashjs floods the console with :

  Searching for initialization.    
  
  Start searching for initialization.     
  
  Perform init search: http://localhost:8080/video_1280x720_500k.webm    
  
  Perform SIDX load: http://localhost:8080/video_640x360_750k.webm     
  
  Perform SIDX load: http://localhost:8080/video_1280x720_500k.webm 

  Writing that to console until I stop the server. I have tried using other mpd files such as this, which is used on the dashjs quickstart and it plays the video without any problems.

  I used this guide to install the latest version of ffmpeg on Ubuntu 14.04 LTS :

  ffmpeg version N-79688-g3cb3ddd Copyright (c) 2000-2016 the FFmpeg developers
  
  built with gcc 5.3.0 (Ubuntu 5.3.0-3ubuntu1~14.04) 20151204
  
  configuration: --prefix=/home/ab/cpp/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/ab/cpp/ffmpeg_build/include --extra-ldflags=-L/home/ab/cpp/ffmpeg/lib --bindir=/home/ab/bin --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-nonfree
  
  libavutil      55. 23.100 / 55. 23.100
  
  libavcodec     57. 38.100 / 57. 38.100
  
  libavformat    57. 34.103 / 57. 34.103
  
  libavdevice    57.  0.101 / 57.  0.101
  
  libavfilter     6. 44.100 /  6. 44.100
  
  libswscale      4.  1.100 /  4.  1.100
  
  libswresample   2.  0.101 /  2.  0.101
  
  libpostproc    54.  0.100 / 54.  0.100

  When running on ffmpeg :

  ffmpeg \
  
   -f webm_dash_manifest -i video_160x90_250k.webm \
  
   -f webm_dash_manifest -i video_320x180_500k.webm \
  
   -f webm_dash_manifest -i video_640x360_750k.webm \
  
   -f webm_dash_manifest -i video_640x360_1000k.webm \
  
   -f webm_dash_manifest -i video_1280x720_500k.webm \
  
   -f webm_dash_manifest -i audio_128k.webm \
  
   -c copy -map 0 -map 1 -map 2 -map 3 -map 4 -map 5 \
  
   -f webm_dash_manifest \
  
   -adaptation_sets "id=0,streams=0,1,2,3,4 id=1,streams=5" \
  
   manifest.mpd

  It generates the following manifest.mpd :

  <?xml version="1.0" encoding="UTF-8"?>
  
  <mpd xmlns="urn:mpeg:DASH:schema:MPD:2011" type="static" mediapresentationduration="PT117.726S" minbuffertime="PT1S" profiles="urn:webm:dash:profile:webm-on-demand:2012">
  
    <period start="PT0S" duration="PT117.726S">
  
      <adaptationset mimetype="video/webm" codecs="vp9" lang="eng" bitstreamswitching="true" subsegmentalignment="true" subsegmentstartswithsap="1">
  
        <representation bandwidth="198155" width="160" height="90">
  
          <baseurl>video_160x90_250k.webm</baseurl>
  
          <segmentbase indexrange="2007834-2008211">
  
            <initialization range="0-437"></initialization>
  
          </segmentbase>
  
        </representation>
  
        <representation bandwidth="459264" width="320" height="180">
  
          <baseurl>video_320x180_500k.webm</baseurl>
  
          <segmentbase indexrange="4459996-4460374">
  
            <initialization range="0-439"></initialization>
  
          </segmentbase>
  
        </representation>
  
        <representation bandwidth="718495" width="640" height="360">
  
          <baseurl>video_640x360_750k.webm</baseurl>
  
          <segmentbase indexrange="6614036-6614414">
  
            <initialization range="0-441"></initialization>
  
          </segmentbase>
  
        </representation>
  
        <representation bandwidth="931445" width="640" height="360">
  
          <baseurl>video_640x360_1000k.webm</baseurl>
  
          <segmentbase indexrange="8309082-8309460">
  
            <initialization range="0-441"></initialization>
  
          </segmentbase>
  
        </representation>
  
        <representation bandwidth="821274" width="1280" height="720">
  
          <baseurl>video_1280x720_500k.webm</baseurl>
  
          <segmentbase indexrange="8728812-8729190">
  
            <initialization range="0-441"></initialization>
  
          </segmentbase>
  
        </representation>
  
      </adaptationset>
  
      <adaptationset mimetype="audio/webm" codecs="vorbis" lang="eng" audiosamplingrate="44100" bitstreamswitching="true" subsegmentalignment="true" subsegmentstartswithsap="1">
  
        <representation bandwidth="107104">
  
          <baseurl>audio_128k.webm</baseurl>
  
          <segmentbase indexrange="1538710-1539184">
  
            <initialization range="0-4112"></initialization>
  
          </segmentbase>
  
        </representation>
  
      </adaptationset>
  
    </period>
  
  </mpd>

  The index.html has a few changes because dash.js changed the way the player gets initialized.

      
  
          
  
          
  
          <code class="echappe-js">&lt;script src=&quot;http://cdn.dashjs.org/latest/dash.all.debug.js&quot;&gt;&lt;/script&gt;
  
              
          
  

  And here is Chromium’s log file. I’m converting this webm from this site.

  If I missed out any other relevant information or if anyone can guide me into the right direction, please let me know.

  Edit :

  Like Will Law mentioned, using the Shaka Player worked without any issues with my current manifest. Hope this helps anyone else.