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• Zooming animation in FFMPEG

  2 novembre 2015, par dmcontador

  I need to make a zooming animation for a video input.

  Making a panning animation is possible with the crop filter with something like this :

  "crop=320:240:max(0\\,min(iw-ow\\,n)):0"

  Where the first two parameters, width and height, are fixed, and the second two parameters, accept frame number n or timestamp t as expression parameters.

  But width and height are evaluated only once (and cannot use n or t), so I cannot crop a size in function of time and then apply a scale filter to the original size.

  I know I can :

  • Change the filter after pulling each frame from the buffersink (I’m not in the command line, I’m using the libraries in my software). I’m doing that already, but no for every frame, only by user request in an online application.
  • Use geq filter to "apply a generic equation to each frame".

  Both approaches seem expensive. Is there another filter or approach I could use ?

  Note that I’m using zeranoe FFMPEG libraries in Windows. I’d rather not develop my own filters or modify FFMPEG source.

• How to read .mp4 files in opencv

  9 mai 2016, par Noah

  I am totally newbie in OpenCV, C++. Trying to read an mp4 video but found OpenCV does not support mp4, it only reads avi(I am not sure whether I am write or wrong). After an online research came to know ffmpeg is the best option to convert mp4 to avi for further processing.

  I am using OpenCV 3.0 with visual studio 2012. I saw there is a dll file, opencv_ffmpeg300.dll in OpenCV C:\opencv\build\x86\vc11\bin folder. Is there any way I can use this dll file to read and convert my video ?

  It will be really appreciating if someone can provide me some guidelines, I am lost in the OpenCV world totally.

  For video,

  Video I/O:
  
     Video for Windows:           YES
  
     DC1394 1.x:                  NO
  
     DC1394 2.x:                  NO
  
     FFMPEG:                      YES (prebuilt binaries)
  
       codec:                     YES (ver 55.18.102)
  
       format:                    YES (ver 55.12.100)
  
       util:                      YES (ver 52.38.100)
  
       swscale:                   YES (ver 2.3.100)
  
       resample:                  NO
  
       gentoo-style:              YES
  
     OpenNI:                      NO
  
     OpenNI PrimeSensor Modules:  NO
  
     OpenNI2:                     NO
  
     PvAPI:                       NO
  
     GigEVisionSDK:               NO
  
     DirectShow:                  YES
  
     Media Foundation:            NO
  
     XIMEA:                       NO
  
     Intel PerC:                  NO

• File not found at path : on laravel 5.6

  9 mars 2018, par syehbi herbian

  i am using laravel 5.6, i will try to make function multiple upload video, and get frame and duration with laravel-ffmpeg, but when i try to upload one video for example, always show error like "File not found at path :",

  this is my function to store video and get duration & frame :

  public function doCreate($lessonsid)
  
    {
  
        if (empty(Session::get('contribID'))) {
  
          return redirect('contributor/login');
  
        }
  
      # code...
  
      // validate
  
      // read more on validation at http://laravel.com/docs/validation
  
      $rules = array(
  
        'judul'          => 'required',
  
      //   'video.*'  => 'mimes:mp4,mov,ogg,webm |required|max:100000',
  
      //   'image.*' => 'mimes:jpeg,jpg,png,gif|required|max:30000'
  
      );
  
      $validator = Validator::make(Input::all(), $rules);
  
  
  
      // process the login
  
      if ($validator->fails()) {
  
          return redirect()->back()->withErrors($validator)->withInput();
  
      } else {
  
  
  
          $now          = new DateTime();
  
          $cid          = Session::get('contribID');
  
          $title        = Input::get('judul');
  
          $image_video = Input::file('image');
  
          $lessons_video = Input::file('video');
  
          // dd($lessons_video);
  
          // $media = FFMpeg::open('https:/dev.cilsy.id/assets/source/lessons/lessons-74/video-8/1. Introduction (2).mp4');
  
          // $frame = $media->getFrameFromString('00:00:13.37');
  
          // dd($media);    
  
          $description  = Input::get('desc');
  
  
  
          $video=Video::where('lessons_id',$lessonsid)->get();
  
          $count_video=count($video);
  
  
  
  
  
          if (!is_dir("assets/source/lessons/lessons-$lessonsid")) {
  
                  $newforder=mkdir("assets/source/lessons/lessons-".$lessonsid);
  
          }
  
  
  
          $i=$count_video + 1;
  
          foreach ($title as $key => $titles) {
  
                  $type_video =$lessons_video[$key]->getMimeType();
  
  
  
                  if (!is_dir("assets/source/lessons/lessons-".$lessonsid."/video-".$i)) {
  
                          $newforder=mkdir("assets/source/lessons/lessons-".$lessonsid."/video-".$i);
  
                  }
  
                  $DestinationPath= 'assets/source/lessons/lessons-'.$lessonsid.'/video-'.$i;
  
                  //insert image
  
                  if(!empty($image_video[$key])){
  
                      $imagefilename    = $image_video[$key]->getClientOriginalName();
  
                      $image_video[$key]->move($DestinationPath, $imagefilename);
  
                  }else{
  
                      $imagefilename    = '';
  
                  }
  
                  if($imagefilename ==''){
  
                      $url_image= $imagefilename;
  
                  }else{
  
                      $urls=url('');
  
                      $url_image= $urls.'/assets/source/lessons/video-'.$i.'/'.$imagefilename;
  
                  }
  
  
  
                  //insert video
  
                  if(!empty($lessons_video[$key])){
  
                      $lessonsfilename    = $lessons_video[$key]->getClientOriginalName();
  
                      $lessons_video[$key]->storeAs($DestinationPath, $lessonsfilename);
  
                  }else{
  
                      $lessonsfilename    = '';
  
                  }
  
                  if($lessonsfilename ==''){
  
                      $url_video= $lessonsfilename;
  
                  }else{
  
                      $urls=url('');
  
                      $url_video= $urls.'/assets/source/lessons/video-'.$i.'/'.$lessonsfilename;
  
                  }
  
  
  
  
  
  
  
  
  
                  $store                  = new Video;
  
                  $store->lessons_id      = $lessonsid;
  
                  $store->title           = $titles;
  
                  $store->image           = $url_image;
  
                  $store->video           = $url_video;
  
                  $store->description     = $description[$key];
  
                  $store->type_video      = $type_video;
  
                  $store->durasi          = 0;
  
                  $store->created_at      = $now;
  
                  $store->enable=1;
  
                  $store->save();
  
                  if($store){
  
                      $media = FFMpeg::open($url_video);
  
                      // $frame = FFMpeg::open($link)
  
                      //         ->getFrameFromSeconds(10)
  
                      //         ->export()
  
                      //         ->toDisk('public')
  
                      //         ->save($filename.'.png');
  
                      dd($media);
  
                      $durationInSeconds = $media->getDurationInSeconds();
  
                      // dd($media);
  
  
  
  
  
                  }
  
          $i++;
  
          }
  
  
  
          // Session::set('lessons_title',$title);
  
          // Session::set('lessons_category_id',$category_id);
  
          // Session::set('lessons_image',$image);
  
          // Session::set('lessons_description',$description);
  
  
  
          return redirect('contributor/lessons/'.$lessonsid.'/view')->with('success','Penambahan video berhasil');
  
  
  
      }
  
    }

  this is message error, when i try to upload my video

  

  anyone can help me ?