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• How to create a clip from an mp4-file quickly ?

  26 mars 2023, par Moritz Groß

  I have a web app that lets users download a clip from a mp4-file specified before. Currently I use ffmpeg via python like this :

  


  os.system('ffmpeg -i original_video -ss {start} -t {duration} result_video')


  


  Processing 10 minutes of 720p video with this method also takes a few minutes (during the execution, ffmpeg displays speed=3x on average). Does this mean processing 10 minutes of video takes 3minutes & 20 seconds as I understand it ?

  


  Is this slow of a performance expected ? Can I improve it by using an other filetype than mp4 ?

  


• PHP upload video files to database

  13 janvier 2016, par Mick Jack

  I am working on a school project that let users upload video files to a server. Server will compress the video using ffmpeg and store the file in upload folder. Other users will be able to stream the uploaded videos.

  My question is how do i retrieve the video that ffmpeg generated and store the link in the database ?

  i am using this code but it only retrieve path of the original video.

  $filePath = dirname(__FILE__); 

  partial code of Upload.php

  $target_dir = "upload/"; //where you want to upload the files to
  
  $target_file = $target_dir.basename($_FILES['file']['name']);
  
  $fileType = pathinfo($target_file, PATHINFO_EXTENSION);
  
  $newFileName = $target_dir.sha1(pathinfo(basename($_FILES['file']['name']), PATHINFO_FILENAME)).'-'.time().'.'.$fileType;
  
  move_uploaded_file($_FILES['file']['tmp_name'], $newFileName);
  
  $unique_id = rand(1000000,9999999);
  
  
  
  shell_exec("C:\\ffmpeg\\bin\\ffmpeg.exe -i ".$newFileName." -vcodec libx264 -crf 20 \"upload\\{$newFileName}\" > logfile.txt 2>&1");
  
  
  
  /// save information into database
  
                  $username = "root";
  
                  $password = "";
  
                  $hostname = "localhost"; 
  
                  $dbname = "test_database";
  
  
  
                  //connect to the database
  
                  $dbc = mysqli_connect($hostname, $username, $password, $dbname) or die ("could not connect to the database");
  
  
  
                  //execute the SQL query and return records
  
                   $result = mysqli_query($dbc, "INSERT INTO `viewvideo` (`vID`, 'video_id`, `video_link`) VALUES ('', '".$unique_id."', '".$newFileName."')");
  
  
  
                  if(!$result){echo mysqli_error($dbc); }
  
  
  
                  echo $result;
  
  
  
              /*  
  
                  declare in the order variable
  
                  $result = mysqli_query($dbc, $sql); //order executes
  
                  if($result){
  
                      echo("<br />Input data is succeed");
  
                  } else{
  
                      echo("<br />Input data is fail");
  
                  }
  
              */  
  
  
  
                  //close the connection
  
                  mysqli_close($dbc);

  output
  

• Wave Goodbye ; What About VP8/WebM ?

  7 août 2010, par Multimedia Mike — Multimedia PressWatch

  Some big news in the geek community this past week came in the form of Google’s announcement that it would no longer be caring about its vaunted Wave technology. I was mildly heartbroken by this since I had honestly wanted to try Google Wave. Then I remembered why I never got a chance to try it : they made it an exclusive club at the beginning. I really did try to glean some utility out of the concept by reading documentation and watching videos and I had some ideas about how I might apply it. Then again, I try to think of a use for nearly any technology that crosses my path.

  It still struck me as odd : Why would Google claim that no one was interested in their platform when they wouldn’t give anyone a chance to try it out ? A little digging reveals that Google did open it for general use back around May 18. That date sounds familiar... oh yeah, VP8 was open sourced right around the same time. Maybe that’s why I don’t remember hearing anything about Wave at the time.

  But now I’m wondering about VP8 and WebM. How long do you think it might be before Google loses interest in these initiatives as well and reassigns their engineering resources ? Fortunately, if they did do that, the technology would live on thanks to the efforts of FFmpeg developers. A multimedia format has a far more clear-cut use case than Google Wave.