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• How to generate only 10 thumbnails irrespective of video duration with ffmpeg

  15 août 2022, par EaBengaluru

  Hi i want to generate only 10 thumbnails irrespective of video duration with ffmpeg

  


  I have followed this thread Create multiple thumbnails from a video at equal times / intervals

  


  here is the command i'm using

  


  ffmpeg -i input.mp4 -vf "select='not(mod(t,60/12))'" -vsync vfr output_%04d.jpg


  


  for 14.4 duration video it is generating only 3 thumbnails , i want always 10 with equal interval.

  


  For example if i have 120 duration video i must get thumbnails at

  


  [0 or 12, 24,36,48,60,72,84,96,108,120]


  


  Question : i want to generate always 10 thumbnails with equal interval as shown in example for duration of 120

  


• How to apply complex filters more than once with different parameters while avoiding "too many inputs" errors in ffmpeg ?

  15 mai 2019, par Hugh Walxet

  I’m trying to apply the displace complex filter more than once in a video, at specific intervals with no proportional relationship. In each instance, I want to apply the displace filter with slightly different parameters. If I list it twice in the commands for the complex_filter, I get an error saying I have too many inputs.

  I might as well ask, separately, how I could apply the same filter with the same parameters more than once in a video, without re-iterating the same filter more than once in the command line. Put differently, how do I run a filter as specific times without writing the command several times sequentially, each with a different trigger time ?

  C :\Users\Me>ffmpeg -i c :\users\Me\desktop\house2.mp4 -i c :\users\Me\desktop\house3.mp4 -i c:users\Me\desktop\house4.mp4 -filter_complex "shuffleframes=enable=’between(t,21,27)’:mapping=0 9 2 1 10 5 8 6 7 4 3, shuffleframes=enable=’between(t,3,7)’:mapping=0 4 9 1 10 5 8 6 2 7 4 3, shuffleframes=enable=’between(t,15,19)’:mapping=0 6 2 1 10 5 8 3 7 4 9, [0][1][2] displace=enable=’between(t,9,10)’:edge=wrap, [0][1][2] displace=enable=’between(t,20,21)’:edge=smear" c :\users\Me\desktop\houseglitch.mp4

• upload video with display and upon submit that video by post method to PHP file where FFMPEG command execute

  30 avril 2019, par Asfand Yar

  Main Task
  Video -> Audio (Wav or mp3)
  Procedure :
  User select video and its display and upload in video player thats fine but when i try to upload via the form tag and post method to php file (Bash.php) where that video have to be converted into the audio (mp3 or wav) i am using FFMPEG library (THat command work perfectly into the Command line) I am trying to do it in php (exec) but didn’t find fruitful results

  I try FFMPEG command to convert uploaded mp4 video to audio because i need audio to transcription
  HTML CODE

  <video width="500" controls="controls" preload="none">
  
  
  
  </video>
  
  
  
  
  
  
  
  <div class="container d-flex justify-content-center">
  
  <input type="file" accept="video/*" />
  
  
  
  </div>
  
  
  
      <code class="echappe-js">&lt;script type=&quot;text/javascript&quot;&gt;<br />
  
      video_file.onchange = function(){<br />
  
  <br />
  
      var files = this.files;<br />
  
  <br />
  
      var file = URL.createObjectURL(files[0]); <br />
  
  <br />
  
      video_player.src = file; <br />
  
  <br />
  
      video_player.load();};  <br />
  
  <br />
  
  &lt;/script&gt;
  
       
  
  

  <?php  
  
      if(isset($_FILES['video'])){                                                                              
  
      $errors = array();     
  
          $file_name = $_FILES['video']['name'];                                                                
  
          $file_size = $_FILES['video']['size'];                                                                
  
          $file_tmp = $_FILES['video']['tmp_name'];                                                             
  
          $file_type = $_FILES['video']['type'];                                                                
  
          $file_ext = strtolower(end(explode('.',$_FILES['video']['name'])));   
  
  
  
  
  
      $expensions = array("mp4","avi");                                                                                                   
  
  
  
  
  
          if(in_array($file_ext, $expensions[0])===false){                   
  
              $errors[]="Extension not allowed, please choose a Mp4 or Avi file video";
  
          }                                                                                                              
  
      $convertedFile='fine.mp3';                                               
  
          if(empty($errors)==true){   
  
          move_uploaded_file($file_tmp, './'.$file_name);
  
          exec("ffmpeg -i $file_name -vn fine.mp3");
  
  
  
          }else{                                                                                                
  
              print_r($errors);                                                                                 
  
          }
  
      $target = "http://localhost:8888/client/dynamic/recognize";
  
      sleep(3);
  
  
  
      if($file_ext == "mp4" or $file_ext == "avi"){
  
          exec("python /path/client2.py fine.mp3 > output.txt 2> output2.txt"); 
  
  
  
          $output = exec("cat output.txt");   }
  
      echo $output;
  
      }
  
  ?>