Recherche avancée

Sur d’autres sites (4912)

• Converting video with ffmpeg from a script not in the root folder

  30 octobre 2017, par Daniel Ormerod

  I am using ffmpeg to convert videos, create thumbnails etc.

  I made the below function to convert a video and when I run it in a script in the root folder it converts ok.

  However, I am using ajax to upload the video and the script is located /ajax/upload-video.php and when I run it in that folder it fails to convert.

  I have tried sending the $src and $dest up with ../ before the filenames to go back a folder but it isn’t working.

  Can anybody help ?

  Do I need to add something to the $command line to tell it to go back a folder ?

  These are the variables being used in the function :

  $ffmpegpath = 'ffmpeg.exe';
  
  $src = 'videos/video1.wmv';
  
  $dest = 'videos/video1.mp4';

  I have tried :

  $ffmpegpath = 'ffmpeg.exe';
  
  $src = '../videos/video1.wmv';
  
  $dest = '../videos/video1.mp4';

  And the function :

  function convert_video($src, $dest) {
  
  
  
      global $ffmpegpath;
  
  
  
      if (!file_exists($src)) {
  
  
  
          echo '<p>The file does not exist</p>';
  
  
  
      } else {
  
  
  
          $command = "$ffmpegpath -i $src $dest";
  
  
  
          @exec($command, $ret);
  
  
  
          if (!file_exists($dest)) {
  
  
  
              echo '<p>The file failed to create</p>';
  
  
  
          } else {
  
  
  
              if (filesize($dest)==0) {
  
  
  
                  echo '<p>The file created but has not filesize</p>';
  
  
  
              } else {
  
  
  
                  echo '<p>File Created Successfully</p>';
  
  
  
              }
  
  
  
          }
  
  
  
      }
  
  
  
  }

• Better examples/language for supported vs. ok(), onready()/ontimeout()

  30 décembre 2010, par Scott Schiller

  m doc/getstarted/index.html m doc/index.html Better examples/language for supported vs. ok(), onready()/ontimeout()

• How to convert natural language to structural description like FFmpeg filter graph strings

  11 juillet 2022, par 张无敌

  I'm working on a program that takes natural language as input, and outputs valid FFmpeg filter graph description, for example :

  


  Input string :

  


  rotate 1.mp4 90deg clockwise, downscale to 480p, output 2.mpeg


  


  Output description :

  


  rotate=a=90,scale=640*480


  


  It seems impractical with complete natural language, especially in the case of complex filter graphs, but still doable with slightly formatted input.

  


  I am new to NLP, wondering which areas or methods could help implement this.