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• Nexus One

  19 mars 2010, par Mans — Uncategorized

  I have had a Nexus One for about a week (thanks Google), and naturally I have an opinion or two about it.
  

  Hardware

  With the front side dominated by a touch-screen and a lone, round button, the Nexus One appearance is similar to that of most contemporary smartphones. The reverse sports a 5 megapixel camera with LED flash, a Google logo, and a smaller HTC logo. Power button, volume control, and headphone and micro-USB sockets are found along the edges. It is with appreciation I note the lack of a front-facing camera ; the silly idea of video calls is finally put to rest.

  Powering up the phone (I’m beginning to question the applicability of that word), I am immediately enamoured with the display. At 800×480 pixels, the AMOLED display is crystal-clear and easily viewable even in bright light. In a darker environment, the display automatically dims. The display does have one quirk in that the subpixel pattern doesn’t actually have a full RGB triplet for each pixel. The close-up photo below shows the pattern seen when displaying a solid white colour.

  

  The result of this is that fine vertical lines, particularly red or blue ones, look a bit jagged. Most of the time this is not much of a problem, and I find it an acceptable compromise for the higher effective resolution it provides.

  Basic interaction

  The Android system is by now familiar, and the Nexus offers no surprises in basic usage. All the usual applications come pre-installed : browser, email, calendar, contacts, maps, and even voice calls. Many of the applications integrate with a Google account, which is nice. Calendar entries, map placemarks, etc. are automatically shared between desktop and mobile. Gone is the need for the bug-ridden custom synchronisation software with which mobile phones of the past were plagued.

  Launching applications is mostly speedy, and recently used apps are kept loaded as long as memory needs allow. Although this garbage-collection-style of application management, where you are never quite sure whether an app is still running, takes a few moments of acclimatisation, it works reasonably well in day to day use. Most of the applications are well-behaved and save their data before terminating.

  Email

  Two email applications are included out of the box : one generic and one Gmail-only. As I do not use Gmail, I cannot comment on this application. The generic email client supports IMAP, but is rather limited in functionality. Fortunately, a much-enhanced version, K-9, is available for download. The main feature I find lacking here is threaded message view.

  The features, or lack thereof, in the email applications is not, however, of huge importance, as composing email, or any longer piece of text, is something one rather avoids on a system like this. The on-screen keyboard, while falling among the better of its kind, is still slow to use. Lack of tactile feedback means accidentally tapping the wrong key is easily done, and entering numbers or punctuation is an outright chore.

  Browser

  Whatever the Nexus lacks in email abilities, it makes up for with the browser. Surfing the web on a phone has never been this pleasant. Page rendering is quick, and zooming is fast and simple. Even pages not designed for mobile viewing are easy to read with smart reformatting almost entirely eliminating the sideways scrolling which hampered many a mobile browser of old.

  Calls and messaging

  Being a phone, the Nexus One is obviously able to make and receive calls, and it does so with ease. Entering a number or locating a stored contact are both straight-forward operations. During a call, audio is clear and of adequate loudness, although I have yet to use the phone in really noisy surroundings.

  The other traditional task of a mobile phone, messaging, is also well-supported. There isn’t really much to say about this.

  Multimedia

  Having a bit of an interest in most things multimedia, I obviously tested the capabilities of the Nexus by throwing some assorted samples at it, revealing ample space for improvement. With video limited to H.264 and MPEG4, and the only supported audio codecs being AAC, MP3, Vorbis, and AMR, there are many files which will not play.

  To make matters worse, only selected combinations of audio and video will play together. Several video files I tested played without sound, yet when presented with the very same audio data alone, it was correctly decoded. As for container formats, it appears restricted to MP4/MOV, and Ogg (for Vorbis). AVI files are recognised as media files, but I was unable to find an AVI file which would play.

  With a device clearly capable of so much more, the poor multimedia support is nothing short of embarrassing.

  The Market

  Much of the hype surrounding Android revolves around the Market, Google’s virtual marketplace for app authors to sell or give away their creations. The thousands of available applications are broadly categorised, and a search function is available.

  The categorised lists are divided into free and paid sections, while search results, disappointingly, are not. To aid the decision, ratings and comments are displayed alongside the summary and screenshots of each application. Overall, the process of finding and installing an application is mostly painless. While it could certainly be improved, it could also have been much worse.

  The applications themselves are, as hinted above, beyond numerous. Sadly, quality does not quite match up to quantity. The vast majority of the apps are pointless, though occasionally mildly amusing, gimmicks of no practical value. The really good ones, and they do exist, are very hard to find unless one knows precisely what to look for.

  Battery

  Packing great performance into a pocket-size device comes with a price in battery life. The battery in the Nexus lasts considerably shorter time than that in my older, less feature-packed Nokia phone. To some extent this is probably a result of me actually using it a lot more, yet the end result is the same : more frequent recharging. I should probably get used to the idea of recharging the phone every other night.

  Verdict

  The Nexus One is a capable hardware platform running an OS with plenty of potential. The applications are still somewhat lacking (or very hard to find), although the basic features work reasonably well. Hopefully future Android updates will see more and better core applications integrated, and I imagine that over time, I will find third-party apps to solve my problems in a way I like. I am not putting this phone on the shelf just yet.

• ffmpeg - Encoding Percentage in PHP

  13 juillet 2012, par Jimbo

  I've written a whole system in PHP and bash on the server to convert and stream videos in HTML5 on my VPS. The conversion is done by ffmpeg in the background and the contents is output to block.txt.

  Having looked at the following posts :

  Can ffmpeg show a progress bar ?

  and

  ffmpeg video encoding progress bar

  amongst others, I can't find a working example.

  I have always struggled with the regexes and maths, and I need to grab the currently encoded progress as a percentage.

  The first post I linked above gives :

  $log = @file_get_contents('block.txt');
  
  
  
  preg_match("/Duration:([^,]+)/", $log, $matches);
  
  list($hours,$minutes,$seconds,$mili) = split(":",$matches[1]);
  
  $seconds = (($hours * 3600) + ($minutes * 60) + $seconds);
  
  $seconds = round($seconds);
  
  
  
  $page = join("",file("$txt"));
  
  $kw = explode("time=", $page);
  
  $last = array_pop($kw);
  
  $values = explode(' ', $last);
  
  $curTime = round($values[0]);
  
  $percent_extracted = round((($curTime * 100)/($seconds)));
  
  
  
  echo $percent_extracted;

  The $percent_extracted variable echoes zero, and as maths is not my strong point, I really don't know how to progress here.

  Here's one line from the ffmpeg output from block.txt (if it's helpful)

  time=00:19:25.16 bitrate= 823.0kbits/s frame=27963 fps= 7 q=0.0 size=
  117085kB time=00:19:25.33 bitrate= 823.1kbits/s frame=27967 fps= 7
  q=0.0 size= 117085kB time=00:19:25.49 bitrate= 823.0kbits/s
  frame=27971 fps= 7 q=0.0 size= 117126kB

  Please help me output this percentage, once done I can create my own progress bar. Thanks.

• using ffmpeg as multiple downloads

  26 avril 2013, par user2321982

  well guys, I'm having problems with my application.
  well I'll explain more, I'm using the plugin uploader uploads multiple videos and I'm using the ffmpeg extension to my php version.

  <code class="echappe-js">&lt;script type=&quot;text/javascript&quot;&gt;<br />
  
  // Convert divs to queue widgets when the DOM is ready<br />
  
  $(function() {<br />
  
      $(&quot;#uploader&quot;).pluploadQueue({<br />
  
          // General settings<br />
  
          runtimes : &amp;#39;gears,flash,silverlight,browserplus,html5&amp;#39;,<br />
  
          url : &amp;#39;upload.php?id=&amp;lt;?= $login_usuario; ?&gt;&amp;amp;name=&amp;lt;?= $name_user; ?&gt;&amp;#39;,<br />
  
          flash_swf_url : &amp;#39;plugins/plupload/plupload.flash.swf&amp;#39;,<br />
  
          containers: &amp;#39;plupload&amp;#39;,<br />
  
          multipart: true,<br />
  
          urlstream_upload: true,<br />
  
          multipart_params:{directory:&amp;#39;uploads&amp;#39;},<br />
  
          multi_selection: true,<br />
  
  <br />
  
          max_file_size : &amp;#39;500mb&amp;#39;,<br />
  
          chunk_size : &amp;#39;1mb&amp;#39;,<br />
  
          unique_names : true,<br />
  
  <br />
  
          // Specify what files to browse for<br />
  
          filters : [<br />
  
              {title : &quot;Video Files&quot;, extensions : &quot;avi,mpg,wmv,flv,3gp,mpeg,mpeg4,mpg4,mp4&quot;}<br />
  
          ],<br />
  
          // Silverlight settings<br />
  
          silverlight_xap_url : &amp;#39;plugins/plupload/plupload.silverlight.xap&amp;#39;<br />
  
      });<br />
  
  <br />
  
      uploader.ini();<br />
  
  <br />
  
   // Client side form validation<br />
  
          $(&amp;#39;form&amp;#39;).submit(function(e) {<br />
  
              var uploader = $(&amp;#39;#uploader&amp;#39;).plupload(&amp;#39;getUploader&amp;#39;);<br />
  
  <br />
  
              // Files in queue upload them first<br />
  
              if (uploader.files.length &gt; 0) {<br />
  
                  // When all files are uploaded submit form<br />
  
                  uploader.bind(&amp;#39;StateChanged&amp;#39;, function() {<br />
  
                      if (uploader.files.length === (uploader.total.uploaded + uploader.total.failed)) {<br />
  
                          $(&amp;#39;form&amp;#39;)[0].submit();<br />
  
                      }<br />
  
                  });<br />
  
  <br />
  
                  uploader.start();<br />
  
              } else<br />
  
                  alert(&amp;#39;You must at least upload one file.&amp;#39;);<br />
  
  <br />
  
              return false;<br />
  
          });<br />
  
      });<br />
  
  &lt;/script&gt;
  
                              
  You browser doesn't have Flash, Silverlight, Gears, BrowserPlus or HTML5 support.
  
  
  

  well he calls javascript in a php file, in case it will upload the videos.

  what I want is to get the length, resolution, file size and take a screenshot of the video randomly, so far so good, the problem is that it only works with only one upload at a time.
  When sending more than one he does the procedure with ffmpeg, besides the most is not taking a screenshot of the video.
  below is my code

  <?php
  
  ini_set('max_execution_time', 300); //300 seconds = 5 minutes
  
  if (!extension_loaded ('ffmpeg') ) exit ( 'ffmpeg não foi carregado!' );
  
  // HTTP headers for no cache etc
  
  header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
  
  header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
  
  header("Cache-Control: no-store, no-cache, must-revalidate");
  
  header("Cache-Control: post-check=0, pre-check=0", false);
  
  header("Pragma: no-cache");
  
  
  
  include("includes/seguranca.php");
  
  include("includes/classes/class.mysql.php");
  
  include("includes/funcoes/sql_inject.php");
  
  
  
  $id_user = anti_injection($_GET['id']);
  
  session_start();
  
  
  
  // Settings
  
  //$targetDir = ini_get("upload_tmp_dir") . DIRECTORY_SEPARATOR . "plupload";
  
  $targetDir = 'uploads/';
  
  
  
  //$cleanupTargetDir = false; // Remove old files
  
  //$maxFileAge = 60 * 60; // Temp file age in seconds
  
  
  
  // 5 minutes execution time
  
  @set_time_limit(5 * 60);
  
  
  
  // Uncomment this one to fake upload time
  
  // usleep(5000);
  
  
  
  // Get parameters
  
  $chunk = isset($_REQUEST["chunk"]) ? $_REQUEST["chunk"] : 0;
  
  $chunks = isset($_REQUEST["chunks"]) ? $_REQUEST["chunks"] : 0;
  
  $fileName = isset($_REQUEST["name"]) ? $_REQUEST["name"] : '';
  
  
  
  // Clean the fileName for security reasons
  
  $fileName = preg_replace('/[^\w\._]+/', '', $fileName);
  
  
  
  // Make sure the fileName is unique but only if chunking is disabled
  
  if ($chunks < 2 && file_exists($targetDir . DIRECTORY_SEPARATOR . $fileName)) {
  
      $ext = strrpos($fileName, '.');
  
      $fileName_a = substr($fileName, 0, $ext);
  
      $fileName_b = substr($fileName, $ext);
  
  
  
      $count = 1;
  
      while (file_exists($targetDir . DIRECTORY_SEPARATOR . $fileName_a . '_' . $count . $fileName_b))
  
          $count++;
  
  
  
      $fileName = $fileName_a . '_' . $count . $fileName_b;
  
  
  
  
  
  }
  
  
  
  // Create target dir
  
  if (!file_exists($targetDir))
  
      @mkdir($targetDir);
  
  
  
  // Look for the content type header
  
  if (isset($_SERVER["HTTP_CONTENT_TYPE"]))
  
      $contentType = $_SERVER["HTTP_CONTENT_TYPE"];
  
  
  
  if (isset($_SERVER["CONTENT_TYPE"]))
  
      $contentType = $_SERVER["CONTENT_TYPE"];
  
  
  
  // Handle non multipart uploads older WebKit versions didn't support multipart in HTML5
  
  if (strpos($contentType, "multipart") !== false) {
  
      if (isset($_FILES['file']['tmp_name']) && is_uploaded_file($_FILES['file']['tmp_name'])) {
  
  
  
  
  
          // Open temp file
  
          $out = fopen($targetDir . DIRECTORY_SEPARATOR . $fileName, $chunk == 0 ? "wb" : "ab");
  
          if ($out) {
  
              // Read binary input stream and append it to temp file
  
              $in = fopen($_FILES['file']['tmp_name'], "rb");
  
  
  
              if ($in) {
  
                  while ($buff = fread($in, 4096))
  
                      fwrite($out, $buff);
  
              } else
  
                  die('{"jsonrpc" : "2.0", "error" : {"code": 101, "message": "Failed to open input stream."}, "id" : "id"}');
  
              fclose($in);
  
              fclose($out);
  
              @unlink($_FILES['file']['tmp_name']);
  
  
  
  
  
  
  
          } else
  
              die('{"jsonrpc" : "2.0", "error" : {"code": 102, "message": "Failed to open output stream."}, "id" : "id"}');
  
      } else
  
          die('{"jsonrpc" : "2.0", "error" : {"code": 103, "message": "Failed to move uploaded file."}, "id" : "id"}');
  
  } else {
  
      // Open temp file
  
      $out = fopen($targetDir . DIRECTORY_SEPARATOR . $fileName, $chunk == 0 ? "wb" : "ab");
  
      if ($out) {
  
          // Read binary input stream and append it to temp file
  
          $in = fopen("php://input", "rb");
  
  
  
          if ($in) {
  
              while ($buff = fread($in, 4096))
  
                  fwrite($out, $buff);
  
          } else
  
              die('{"jsonrpc" : "2.0", "error" : {"code": 101, "message": "Failed to open input stream."}, "id" : "id"}');
  
  
  
          fclose($in);
  
          fclose($out);
  
      } else
  
          die('{"jsonrpc" : "2.0", "error" : {"code": 102, "message": "Failed to open output stream."}, "id" : "id"}');
  
  }
  
  $photoName = $_FILES['file']['name'];
  
  
  
  $exploded_photoName = explode('.', $photoName);
  
  
  
  $user_id = $_SESSION['SESS_MEMBER_ID'];
  
  
  
  if(!isset($_SESSION[$photoName])) {
  
  
  
      $_SESSION[$photoName] = '1';
  
  }
  
  
  
  if($chunk==1){
  
  
  
  $movie_file = realpath("/uploads/".$fileName);
  
  
  
  // instancia a classe ffmpeg_movie para pegarmos as informações que queremos o vídeo
  
  $movie = new ffmpeg_movie($movie_file);
  
  // pegamos a duranção do video em segundos
  
  $duration = round ( $movie->getDuration() , 0 );
  
  // recebemos o número de frames do vídeo
  
  $totalFrames = $movie->getFrameCount();
  
  // recebemos a altura do vídeo em pixels
  
  $height = $movie->getFrameHeight ();
  
  // recebemos a largura do vídeo em pixels
  
  $width = $movie->getFrameWidth ();
  
  
  
  $thumbnailOf = $movie->getFrameRate() * 5;
  
  
  
  $thumbnailOf = round ( $movie->getFrameCount() / 2 );
  
  
  
  // precisamos criar uma imagem GD para o ffmpeg-php trabalhar nela
  
  $image = imagecreatetruecolor ($width,$height ) ;
  
  // criamos a instancia do frame com a classe ffmpeg_frame
  
  $frame = new ffmpeg_frame ($image);
  
  // escolhemos o frame que queremos salvar como jpeg
  
  $thumbnailOf = rand (1,$movie->getFrameCount());
  
  // recebe o frame
  
  $frame = $movie->getFrame ( $thumbnailOf );
  
  // converte para uma imagem GD
  
  $image = $frame->toGDImage ();
  
  
  
  $size = filesize("uploads/".$fileName);
  
  
  
  $valuea = rand(0,100);
  
  $valueb = rand(0,100);
  
  $valuec = rand(0,10);
  
  
  
  $nome = @md5(date('now') * $valuea - $valueb / $valuec);
  
  
  
  $dir = realpath("uploads/snapshots/$nome.jpg");
  
  //salva no HD.
  
  imagejpeg($image, $dir, 100);
  
  
  
  
  
  $resolu = $width."x".$height;
  
  
  
      mysql_query("INSERT INTO video 
  
  (poster_id,duration,video,titulo,resolucao,tamanho) 
  
      VALUES
  
  ('$id_user','$duration','$fileName','$exploded_photoName[0]','$resolu','$size')") or die(mysql_error());
  
  
  
  }
  
  // Return JSON-RPC response
  
  die('{"jsonrpc" : "2.0", "result" : null, "id" : "id"}');
  
  
  
  ?>

  I did another method not so effective to do what I want but it only works if I open the page individually.

  I removed the code from ffmpeg extension and put an include to that page.

  <?
  
  ini_set('max_execution_time', 300); //300 seconds = 5 minutes
  
  if (!extension_loaded ('ffmpeg') ) exit ( 'ffmpeg não foi carregado!' );
  
  
  
  include("includes/seguranca.php");
  
  include("includes/classes/class.mysql.php");
  
  include("includes/funcoes/sql_inject.php");
  
  
  
  $id_user = @anti_injection($_GET['id']);
  
  
  
  class process{
  
      public $videos;
  
      public $target;
  
      public $id_vid;
  
  
  
  public function screen(){
  
  
  
  $videos = $this->videos;
  
  $target = $this->target;
  
  
  
  $movie_file = realpath($videos);
  
  // instancia a classe ffmpeg_movie para pegarmos as informações que queremos o vídeo
  
  $movie = new ffmpeg_movie($movie_file);
  
  $totalFrames = $movie->getFrameCount();
  
  $thumbnailOf = $movie->getFrameRate() * 5;
  
  $thumbnailOf = round ( $movie->getFrameCount() / 2 );
  
  
  
  // criamos a instancia do frame com a classe ffmpeg_frame
  
  $frame = new ffmpeg_frame ( $image );
  
  // escolhemos o frame que queremos salvar como jpeg
  
  
  
  $thumbnailOf = rand (1,$movie->getFrameCount());
  
  // recebe o frame
  
  $frame = $movie->getFrame ( $thumbnailOf );
  
  // converte para uma imagem GD
  
  $image = $frame->toGDImage ();
  
  $valuea = rand(0,100);
  
  $valueb = rand(0,100);
  
  $valuec = rand(0,10);
  
  
  
  $nome = @md5(date('now') * $valuea - $valueb / $valuec);
  
  
  
  $dir = $target."snapshots/".$nome.".jpeg";
  
  //salva no HD.
  
  imagejpeg($image,$dir, 100);
  
  
  
  $q = new Query;
  
  $q  ->update('video')
  
      ->set(
  
          array(
  
             'screen'=>$nome.".jpeg"
  
          )
  
      )
  
          ->where_equal_to(
  
                  array(
  
                          'id_video'=>$this->id_vid
  
                  )
  
          )
  
          ->limit(1)
  
  
  
      ->run();
  
  
  
  }
  
  
  
  
  
  public function duration(){
  
  
  
  $videos = $this->videos;    
  
  $movie_file = realpath($videos);
  
  // instancia a classe ffmpeg_movie para pegarmos as informações que queremos o vídeo
  
  $movie = new ffmpeg_movie($movie_file);
  
  // pegamos a duranção do video em segundos
  
  $duration = round ( $movie->getDuration() , 0 );
  
  
  
  $q = new Query;
  
  $q  ->update('video')
  
      ->set(
  
          array(
  
             'duration'=>$duration
  
          )
  
      )
  
          ->where_equal_to(
  
                  array(
  
                          'id_video'=>$this->id_vid
  
                  )
  
          )
  
          ->limit(1)
  
  
  
      ->run();
  
  }
  
  
  
  
  
  public function resolution(){
  
  
  
  $videos = $this->videos;    
  
  $movie_file = realpath($videos);
  
  // instancia a classe ffmpeg_movie para pegarmos as informações que queremos o vídeo
  
  $movie = new ffmpeg_movie($movie_file);
  
  // recebemos a altura do vídeo em pixels
  
  $height = $movie->getFrameHeight ();
  
  // recebemos a largura do vídeo em pixels
  
  $width = $movie->getFrameWidth ();
  
  $resolucao =  $width."x".$height;
  
  
  
  
  
  $q = new Query;
  
  $q  ->update('video')
  
      ->set(
  
          array(
  
             'resolucao'=>$resolucao
  
          )
  
      )
  
      ->where_equal_to(
  
                  array(
  
                          'id_video'=>$this->id_vid
  
                  )
  
          )
  
          ->limit(1)
  
  
  
      ->run();
  
  }
  
  
  
  final public function checar($a){
  
  
  
  $q = new Query;
  
  $q  ->update('video')
  
      ->set(
  
          array(
  
             'process'=>$a
  
          )
  
      )
  
      ->where_equal_to(
  
                  array(
  
                          'id_video'=>$this->id_vid
  
                  )
  
          )
  
          ->limit(1)
  
  
  
      ->run();
  
  
  
  }
  
  
  
  }
  
  
  
  $q=new Query;
  
  $q->select(
  
                  array(
  
                          'id_video',
  
                          'video',
  
                          'dir',
  
                          'screen',
  
                          'poster_id',
  
                          'resolucao',
  
                          'duration'
  
                  )
  
          )
  
          ->from('video')
  
  
  
  
  
  
  
          ->run();
  
  if($q){
  
          $users=$q->get_selected();
  
          foreach($users as $user){
  
           $c = new process;
  
  
  
           $c->videos = $user['video'];
  
           $c->target = $user['dir'];
  
           $c->id_vid = $user['id_video'];
  
  
  
          if(($user['screen'] == 'NULL') or ($user['duration'] == 'NULL') or ($user['resolucao'] == 'NULL')){
  
                  $c->checar(0);
  
  
  
                  if($user['screen'] == 'NULL'){      
  
                  $c->screen();
  
                  }
  
  
  
                  if($user['duration'] == 'NULL'){
  
                  $c->duration(); 
  
                  }
  
  
  
                  if($user['resolucao'] == 'NULL'){
  
                  $c->resolution();   
  
                  }
  
  
  
          }else{
  
  
  
          $c->checar(1);
  
  
  
          }
  
  
  
          }
  
  }
  
  else{
  
          echo 'Sorry, no users found.';
  
  }
  
  
  
  
  
  
  
  ?>