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• FFMPEG (2.5.7 ) Progress Bar from PHP

  6 mars 2016, par kunal

  i want to have the Progress bar of FFmpeg encoding.This is the Code which i am using to get the percentage value of encoding Process.

  <?php
  
  $content = @file_get_contents("with-logo/output.txt");
  
  //echo $content;
  
  if($content) {
  
      preg_match("/Duration: (.*?), start:/", $content, $matches);
  
  
  
      $rawDuration = $matches[1];
  
  
  
      $ar = array_reverse(explode(":", $rawDuration));
  
      $duration = floatval($ar[0]);
  
      //echo $duration;
  
      if (!empty($ar[1])) $duration += intval($ar[1]) * 60;
  
      if (!empty($ar[2])) $duration += intval($ar[2]) * 60 * 60;
  
  
  
      //get the time in the file that is already encoded
  
      preg_match_all("/time=(.*?) bitrate/", $content, $matches);
  
  
  
      $rawTime = array_pop($matches);
  
  
  
      //this is needed if there is more than one match
  
      if (is_array($rawTime)){$rawTime = array_pop($rawTime);}
  
  
  
      //rawTime is in 00:00:00.00 format. This converts it to seconds.
  
      $ar = array_reverse(explode(":", $rawTime));
  
      $time = floatval($ar[0]);
  
      if (!empty($ar[1])) $time += intval($ar[1]) * 60;
  
      if (!empty($ar[2])) $time += intval($ar[2]) * 60 * 60;
  
  
  
      //calculate the progress
  
      $progress = round(($time/$duration) * 100);
  
  
  
      echo "Duration: " . $duration . "<br />";
  
      echo "Current Time: " . $time . "<br />";
  
      echo "Progress: " . $progress . "%";
  
  }
  
  ?> 

  here is relevant log line form my FFMPEG Log files for Better Understanding.

  Stream mapping:
  
    Stream #0:0 -> #0:0 (mpeg2video (native) -> h264 (libx264))
  
    Stream #0:1 -> #0:1 (pcm_s24le (native) -> aac (native))
  
  Press [q] to stop, [?] for help
  
  
  
  frame=   11 fps=0.0 q=0.0 size=       0kB time=00:00:00.41 bitrate=   0.9kbits/s    
  
  frame=   22 fps= 21 q=0.0 size=       0kB time=00:00:00.85 bitrate=   0.4kbits/s    
  
  frame=   33 fps= 21 q=0.0 size=       0kB time=00:00:01.30 bitrate=   0.3kbits/s    
  
  frame=   43 fps= 20 q=0.0 size=       0kB time=00:00:01.69 bitrate=   0.2kbits/s   

  and this code is not returning the Value for Duration and as a result of this i am getting PHP warning and code is not calculating the Current percentage.

  here is the PHP warning , which i am getting-

  PHP Warning:  Division by zero in /var/www/html/mm/progressbar.php

  i think we can also calculate the percentage from the timebut i have no idea, how can i make it work ?

  or any help to solve the Problem with Duration.

  thanks for the help !

• Anomalie #3815 (Nouveau) : sql_updateq qui ne fait pas de jointure

  10 août 2016, par Ybbet SPIP

  Bonjour,

  Suite à des tests, je remarque que sql_updateq n’applique pas de jointures (explicites) sur les SET.

  Un exemple de comparaison, voici une requête faite avec sql_allfetsel :
  

  1. <span class="CodeRay">sql_allfetsel(<span class="string"><span class="delimiter">'</span><span class="content">mots.id_mot, mots.id_groupe,mots.titre,groupes.titre as type</span><span class="delimiter">'</span></span>, <span class="string"><span class="delimiter">'</span><span class="content">spip_mots as mots, spip_groupes_mots as groupes</span><span class="delimiter">'</span></span>, <span class="string"><span class="delimiter">'</span><span class="content">mots.id_groupe=groupes.id_groupe</span><span class="delimiter">'</span></span>, <span class="string"><span class="delimiter">'</span><span class="delimiter">'</span></span>, <span class="string"><span class="delimiter">'</span><span class="delimiter">'</span></span>, <span class="string"><span class="delimiter">'</span><span class="delimiter">'</span></span>, <span class="string"><span class="delimiter">'</span><span class="delimiter">'</span></span>, <span class="string"><span class="delimiter">'</span><span class="delimiter">'</span></span>, <span class="predefined-constant">false</span>);
  2. </span>

  Télécharger

  
  Lancera la requête SQL :
  

  1. <span class="CodeRay"><span class="class">SELECT</span> mots.id_mot, mots.id_groupe,mots.titre,groupes.titre <span class="keyword">as</span> TYPE
  2. <span class="keyword">FROM</span> spip_mots <span class="keyword">as</span> mots, spip_groupes_mots <span class="keyword">as</span> groupes
  3. <span class="keyword">WHERE</span> mots.id_groupe=groupes.id_groupe
  4. </span>

  Télécharger

  Tandis que sql_updateq :
  

  1. <span class="CodeRay">sql_updateq(<span class="string"><span class="delimiter">'</span><span class="content">spip_mots as mots, spip_groupes_mots as groupes</span><span class="delimiter">'</span></span>, <span class="predefined">array</span>(<span class="string"><span class="delimiter">'</span><span class="content">mots.type</span><span class="delimiter">'</span></span> => <span class="string"><span class="delimiter">'</span><span class="content">groupes.titre</span><span class="delimiter">'</span></span>), <span class="string"><span class="delimiter">"</span><span class="content">mots.id_groupe=groupes.id_groupe</span><span class="delimiter">"</span></span>, <span class="string"><span class="delimiter">'</span><span class="delimiter">'</span></span>, <span class="string"><span class="delimiter">'</span><span class="delimiter">'</span></span>, <span class="predefined-constant">false</span>);
  2. </span>

  Télécharger

  
  Lancera la requête SQL :
  

  1. <span class="CodeRay"><span class="class">UPDATE</span> spip_mots <span class="keyword">as</span> mots, spip_groupes_mots <span class="keyword">as</span> groupes
  2. <span class="keyword">WHERE</span> mots.id_groupe=groupes.id_groupe
  3. </span>

  Télécharger

  Ce qui forcément crée une erreur SQL car il n’y a pas de SET.
  La requête attendue serait celle-ci :
  

  UPDATE spip_mots as mots, spip_groupes_mots as groupes
SET mots.type=groupes.titre
WHERE mots.id_groupe=groupes.id_groupe

  Soit je n’utilise pas correctement cette fonction, soit elle a du mal à interpréter les expressions du SET.

  Qu’en pensez-vous ?

• Using WebRTC to send canvas stream to peer connection

  16 août 2021, par nameless

  I'm currently trying a little project. I have a canvas I can draw in with simple strokes. Now I want to send this canvas content to a MPV player to receive it there, so something like a live stream of the canvas to another computer (in the same network), which receives the live stream via MPV.

  &#xA;&#xA;

  I thought about using FFMPEG to send the live stream then, but the question is how..

  &#xA;&#xA;

  I found WebRTC (click here) to be able to send a canvas to a peer connection as well as to a video element. Sending it to a video element also works fine, sending to a peer connection didn't work so far.

  &#xA;&#xA;

  However I'm still not sure how to send it to FFMPEG or something else in order to receive it on another PC.

  &#xA;&#xA;

  Other ideas are also welcome, its mainly about sending the live image of the canvas to another client with a static IP adress.

  &#xA;&#xA;

  This, by the way, is the code I tried in order to send the canvas content to a video element :

  &#xA;&#xA;

  var canvas = $('#can')[0];
var ctx = canvas.getContext('2d');
var stream = canvas.captureStream(60);

var video = $('#video')[0];
video.srcObject = stream;


  &#xA;