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• Anomalie #2352 (Nouveau) : aide inaccessible lors de l’install

  29 septembre 2011, par denisb -

  spip3. lors de l’install, à l’étape 2 ("Choix de votre base") le bouton d’aide renvoie sur la première page de l’install ("Sélectionnez une langue puis cliquez sur le bouton « suivant » pour lancer la procédure d’installation.") puisque le site n’est pas encore installé... idem pour l’étape 3 ("Le (...)

• HTML5 video in Internet Explorer

  26 juin 2012, par Jamie Taylor

  I have 3 copies of a video :

  Raw AVI

  Encoded .mp4 (h.264 video and mp3 audio)

  Encoded .ogv, encoded with oggtheora

  My HTML 5 player runs in Firefox 14, Chrome 19 and Opera 12, it fails however in, you guessed it.. Internet Explorer 9. As far as I know the h.264 file should be picked up and play, however it's not.

  <video class="vid" width="550" height="400" controls="controls">
  
      <source src="test/charlie.mp4" type="video/mpeg"></source> 
  
      <source src="test/charlie.ogv" type="video/ogg"></source> 
  
      Nope.
  
  </video>

  Any ideas ?

  And please take this picture as a sign of my gratitude

  

  For whoever asked and then deleted their comment :

  htdocs/html5$ ls
  
      index.php  test
  
  htdocs/html5/test$ ls
  
       charlie.avi  charlie.mp4  charlie.ogv

• Use FFMPEG in OpenCV without internet connection

  17 novembre 2022, par Henalds

  I am creating a project in c++ with QtCreator (5.14.1, MingGW compiler) and trying to use OpenCv (3.4.16) to read video files. I have tried many files of standard formats and codecs (H.264, yuv420, .mov etc). However, no matter what I try, VideoCapture() always silently fails. It doesn’t crash or show any error code, instead isOpened() is just always false.

  


  I think the cause is that I am building opencv (via this tutorial https://wiki.qt.io/How_to_setup_Qt_and_openCV_on_Windows) without internet connection (I cannot have internet connection on this machine, so please do not ask me to) and therefore it can’t download the FFMPEG libraries during this process. I have been looking everywhere for information about how to download the FFMPEG libraries for opencv directly but I haven’t had any luck.

  


  Can someone please explain what libraries I need to download and how opencv goes about looking for them ? because at the moment I don’t know what I need, nor where to put them, and I cant find any information on the topic.

  


  Or, can someone explain why calling VideoCapture(“video.mov”, cv::CAP_ANY) doesn’t have any effect ? (despite being able to play the video easily in VLC, MediaPlayer etc).

  


  Code :
`

  


  int main()
{
    VideoCapture cap(“C://video.mov”);
    //VideoCapture cap(“C:/video.mov”);
    //VideoCapture cap(“C:\video.mov”);
    //VideoCapture cap(“C:\video.mov”);

    if (!cap.isOpened()){
        cout << "Error opening video stream or file"<< endl;
        return -1;
    }
}


  


  `

  


  I have tried downloading some ffmpeg DLLs and the EXEs and adding them to the PATH, no success. I have also tried downloading the shared GPL of ffmpeg (that comes with the libs and include) and added them my .pro file but no change in VideoCapture behavior.

  


  I have also tried moving the opencv_ffmpeg_64.dll (found in opencv/build/bin) to my executable directory but that didn't fix anything.