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• How to create effect same video with FFmpeg

  29 juin 2023, par Sang Vo

  How to make a video from an image with a drag effect like this one in FFmpeg :

  


  https://www.youtube.com/watch?v=zC6qbpe3FyE&ab_channel=CloudMood


  


  I tried to zoom in zoom out effects but not the same with video

  


   ffmpeg -loop 1 -i photo.jpg -vf "zoompan=z='min(zoom+0.001,1.2)':x='if(gte(zoom,1.2),x+2,x-1)':y='if(gte(zoom,1.2),y+2,y-1)':d=10*25,framerate=25,scale=1920:1080" -c:v libx264 -t 10 -pix_fmt yuv420p -s 1920x1080 output.mp4


  


• Can FFmpeg perform audio phase subtraction ? [closed]

  22 avril 2023, par Calarpo

  I can do audio phase subtraction in Adobe Audition like so : https://www.youtube.com/watch?v=vNvJKBg3yds

  


  How can I do this with FFmpeg ? Is it possible ?

  


  I've googled for audio phase subtraction, and looked at https://ffmpeg.org/ffmpeg-filters.html, nothing seems to work for me.

  


  I want to do phase subtraction in batches and support for stereo audio.

  


• Can't obtain thumbnail with ffmpeg codeigniter

  2 avril 2015, par DMBorges

  I have used the following tutorial ( https://www.youtube.com/watch?v=qT4hN5o57hI) to try to obtain a thumbnail from a uploaded video using codeigniter as a framework. As I am new to all this I don’t understand if at the end of supposedly uploading my video the code failed to create a thumbnail, if my created thumbnail is somewhere lost in my computer of by some settings reasons ffmpeg is not working.

  Where does my $imageFile goes to ?

  Here is my code.

  MY VIEW

  <div>
  
  
  
              &lt;?php echo form_open_multipart('gallery/save/'); ?>
  
                  <table class="table">
  
                      <tr>
  
                          <td>Video</td>
  
                          <td>&lt;?php echo form_upload('pic'); ?></td>
  
                      </tr>
  
                      <tr>
  
                          <td>Descrição</td>
  
                          <td>&lt;?php echo form_input('description'); ?></td>
  
                      </tr>
  
                      <tr>
  
                          <td></td>
  
                          <td>&lt;?php echo form_submit('upload', 'Guardar', 'class="btn btn-primary"'); ?></td>
  
                      </tr>       
  
                  </table>
  
  
  
      </div>

  MY CONTROLLER

  <?php
  
  class Gallery extends CI_Controller{
  
      public function index(){
  
          //Load View
  
          $data['main_content'] = 'gallery';
  
          $this->load->view('layouts/main', $data);
  
      }
  
  
  
      public function save()
  
      {
  
          $url = $this->do_upload();
  
          $ffmpeg = "C:\\xampp\\htdocs\\ffmpeg\\bin";
  
          $videoFile = $_FILES["pic"]["tmp_name"];
  
          $imageFile = "1.jpg";
  
          $size = "120x90";
  
          $getFromSecond = 5;
  
          $cmd = "$ffmpeg -i $videoFile -an -ss $getFromSecond -s $size $imageFile "; 
  
          echo $cmd;
  
          if(!shell_exec($cmd)){
  
              echo 'thumbnail created!'; 
  
          }
  
          else {
  
              echo 'ERROR!';
  
          }
  
  
  
          /* $config = array(
  
                          'source_image' => $url,
  
                          'new_image' =>"./assets/images/gallery/thumbs/",
  
                          'maintain_ration' => true,
  
                          'width' => 150,
  
                          'height'=> 100
  
                          );
  
                  $this -> load -> library('image_lib', $config);
  
                  $this ->image_lib-> resize();
  
                  $description = $_POST["description"];
  
                  $user = $this->session->userdata('user_id');
  
                  $this->Gallery_model->save($description, $url, $user);
  
                  redirect('gallery'); */
  
      }
  
      private function do_upload()
  
      {
  
          $type = explode('.', $_FILES["pic"]["name"]);
  
          $type = strtolower($type[count($type)-1]);
  
          $id = uniqid(rand());
  
          $url = "./assets/images/gallery/".$id.'.'.$type;
  
          if(in_array($type, array("wmv", "mp4", "avi", "flv")))
  
              if(is_uploaded_file($_FILES["pic"]["tmp_name"]))
  
                  if(move_uploaded_file($_FILES["pic"]["tmp_name"],$url))
  
                      return $url;
  
          return "";
  
      }
  
  }