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• suitable video encoding for browsers

  26 juin 2022, par seriously

  I was researching how illegal movie streaming services handle all the traffic they get and to understand that I had to follow the steps they perform to get the video data to the users. I got to the stage of video transmission and noticed something that boggled me. Most of the illegal movie streaming sites get their movies/tv-shows through piracy/torrents and even most of the streamers are sister companies of the piracy websites. Now when I took a look at the video encodings of the torrent movies and shows they are h.265 but h.265 is not supported by popular browsers like chrome, firefox edge... Does this mean they (the streamers) have to re-encode every h.265 videos to avc/h.264 before they stream it ? If that's the case, that takes them a huge amount of time to convert their whole movie catalog to h.264 not to mention the space they require to save them. Am I taking a look at this the right way ? Do they really convert and store 2, 3 ... differently encoded video files and stream the suitable one ? Or can they somehow convert the chunks of data they are streaming to h.264 live simultaneously without having to store the h.264 formats hence saving conversion time and space ?

  


• ffmpeg on mac to get thumbnail using php

  5 janvier 2017, par freelixa

  i download the ffmpeg for mac and store it into the web folder.

  and in the upload.php i store this line of code. the upload part is successfull but the it failed to create a thumbnail from the video that i upload. please help

  if(isset($_POST['submit'])){
  
      $ffmpeg = "ffmpeg/ffmpeg";
  
      $name = $_FILES['file']['name'];
  
      $temp = $_FILES['file']['tmp_name'];
  
      $imagefile = "1.jpg";
  
      $size = "120x90";
  
      $getfromsecond = 5;
  
      $cmd = "$ffmpeg -i $temp -an -ss $getfromsecond -s $size $imagefile";
  
      if(shell_exec($cmd)){
  
          echo "thumbnail created";
  
      }else{
  
          echo "error in making thumbnail";
  
      }
  
      // hide .mp4 from video title in mysql, but extension still attached in file 
  
      //$name = preg_replace("/\b.mp4\b/i","",$name);
  
      //$name = preg_replace("/\b.flv\b/i","",$name);
  
      // moving the files from temporary name to the actual database and change the name to the actual name
  
      move_uploaded_file($temp,"video/".$name);
  
      $url = "video/$name";
  
      $query = "INSERT INTO `videolist` (`videoname`,`videourl`) VALUES ('$name','$url')";
  
      mysqli_query($connection,$query);
  
  
  
      echo "<br /> Congratulations ".$name." has been uploaded";
  
  }

• lavu/opt : extend AVOptionRange by extra values

  30 mars 2014, par Lukasz Marek

  lavu/opt : extend AVOptionRange by extra values
  AVOptionRange is not flexible enough to store AV_OPT_TYPE_IMAGE_SIZE
  
  ranges. Current implementation can only store pixel count.
  
  This patch aims to keep backward compatibility and extend
  
  AVOptionRange with possibility to store width/height ranges.
  Signed-off-by : Lukasz Marek <lukasz.m.luki@gmail.com>
  

  • [DH] doc/APIchanges
  • [DH] libavutil/opt.c
  • [DH] libavutil/opt.h
  • [DH] libavutil/version.h