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• How to install ffmpeg

  8 octobre 2017, par user5913892

  I want to make a "mini" editor video. My goal is, cut some part of the video and then save it and also create an undo button. Now , I was looking for the best solution (This operation have to be done in a website) and I found that I have to use ffmpeg. I didn’t know if ffmpeg was already installed on my server and I use this php script to discover it :

  <?php
  
  
  
  /**
  
   * Test script for FFmpeg
  
   *
  
   * @author Andycoder /wdevblog.net.ru/>
  
   */
  
  
  
  ini_set('display_errors',1);
  
  error_reporting(E_ALL);
  
  
  
  $is_windows = strpos( php_uname(), "Windows" ) !== false;
  
  $ffmpeg_path = !empty( $_POST['ffmpeg_path'] ) && strpos( $_POST['ffmpeg_path'], 'ffmpeg' ) !== false ? trim( $_POST['ffmpeg_path'] ) : '';
  
  if( !$ffmpeg_path && !$is_windows ){
  
      $ffmpeg_path = trim( shell_exec( 'which ffmpeg' ) );
  
  }
  
  
  
  function getCodecs( $ffmpeg_path = '' ) {
  
  
  
      $lines = array();
  
      $encoders = array();
  
      exec( "{$ffmpeg_path} -codecs", $lines);
  
  
  
      foreach ($lines as $line) {
  
  
  
          if (preg_match('/^\s+([A-Z .]+)\s+(\w{2,})\s+(.*)$/', $line, $m)) {
  
              $type = trim($m[1]);
  
              if (strpos($type, 'E') !== false) {
  
                  $encoder = trim($m[2]);
  
                  if (strpos($encoder, ',') !== false) {
  
                      foreach (split(',', $encoder) as $e) {
  
                          $encoders[] = $e;
  
                      }
  
                  } else {
  
                      $encoders[] = $encoder;
  
                  }
  
              }
  
          }
  
      }
  
      sort($encoders);
  
  
  
      return $encoders;
  
  }
  
  
  
  function getPHPPath(){
  
  
  
      $is_windows = strpos( strtolower(php_uname()), 'windows' ) !== false;
  
  
  
      if( $is_windows ){
  
          $output = dirname(ini_get('extension_dir')) . "/php.exe";
  
      }else{
  
          $output = trim(shell_exec("which php"));
  
      }
  
  
  
      return $output;
  
  }
  
  
  
  $info = array();
  
  
  
  $info['php_version'] = array( 'name' => 'PHP version', 'value' => phpversion() );
  
  $info['php_path'] = array( 'name' => 'PHP path', 'value' =>  getPHPPath() );
  
  $info['web_server'] = array( 'name' => 'Web server', 'value' => $_SERVER['SERVER_SOFTWARE'] );
  
  $info['ffmpeg_path'] = array( 'name' => 'FFMPEG path', 'value' =>  $ffmpeg_path );
  
  
  
  $info['ffmpeg_version'] = array( 'name' => 'FFMPEG version', 'value' => '' );
  
  if( $ffmpeg_path ){
  
      $ffmpeg_ver = shell_exec( "{$ffmpeg_path} -version" );
  
      preg_match( '/.+version.+/', $ffmpeg_ver, $matches );
  
      if( !empty( $matches ) ){
  
          $info['ffmpeg_version']['value'] = $matches[0];
  
      }
  
  }
  
  $info['yamdi_path'] = array( 'name' => 'Yamdi path', 'value' => !$is_windows ? trim(shell_exec('which yamdi')) : '' );
  
  $info['mp4box_path'] = array( 'name' => 'MP4Box (GPAC) path', 'value' => !$is_windows ? trim(shell_exec('which MP4Box')) : '' );
  
  $info['qtfaststart_path'] = array( 'name' => 'qt-faststart path', 'value' => !$is_windows ? trim(shell_exec('which qt-faststart')) : '' );
  
  $info['flvtool2_path'] = array( 'name' => 'flvtool2 path', 'value' => !$is_windows ? trim(shell_exec('which flvtool2')) : '' );
  
  
  
  $info['ffmpeg_codecs'] = array( 'name' => 'FFMPEG codecs', 'value' => array() );
  
  if( $ffmpeg_path ) {
  
      $info['ffmpeg_codecs']['value'] = getCodecs( $ffmpeg_path );
  
  }
  
  
  
  if( empty( $info['ffmpeg_codecs']['value'] ) ){
  
      $info['ffmpeg_path']['value'] = '';
  
  }
  
  
  
  ksort($info);
  
  
  
  ?>
  
  
  
  
  
  
  
      
  
  
  
  
  
  
  
  <code class="echappe-js">&lt;script type=&quot;text/javascript&quot;&gt;<br />
  
      function expandCollapse( id ){<br />
  
          if( document.getElementById(id).style.display == 'none' ){<br />
  
              document.getElementById(id).style.display = 'block';<br />
  
          }else{<br />
  
              document.getElementById(id).style.display = 'none';<br />
  
          }<br />
  
      }<br />
  
  &lt;/script&gt;
  
      
  
          
              FFmpeg path :
              
          
          Submit
      
      
  
  
          < ?php foreach( $info as $key => $opt ) : ?>
          < ?php endforeach ; ?>
  
      
          
          
      
      
  
          
  
              
  Property
              
  Value
          
      
  
  
  
              
  < ?php echo $opt[’name’] ; ?> :
              
  
                  < ?php if( !empty( $opt[’value’] ) ) : ?>
                      < ?php
  
                      if( !is_array( $opt[’value’] ) ) :
  
                          echo $opt[’value’] ;
  
                      else : ?>
                          [Expand/Collapse]
  
                          < ?php foreach( $opt[’value’] as $val ) : ?>
  < ?php echo $val ; ?>
                          < ?php endforeach ; ?>
  
                      < ?php endif ; ?>
                  < ?php else : ?>
  
                      [Not found]
  
                  < ?php endif ; ?>
  
          
  
  
  
  

  that return me this :

  

  So, I have not ffmpeg installed on that server. The server should be Linux, I say this because I use one of the many website in Internet to discover it.
  

  I know that the website say that the Webserver is Engine-x, but my company has told that is Apache (as the php script already told me). Now , I found this link http://www.mysql-apache-php.com/ffmpeg-install.htm (in Stackoverflow and many other parts) that say how to install ffmpeg in Linux, but Where should I execute these commands ? Should I use Putty ? or What ?

• Interfacing to an Xbox Optical Drive

  1er octobre 2013, par Multimedia Mike — xbox

  The next generation Xbox is going to hit the streets soon. But for some reason, I’m still interested in the previous generation’s unit (i.e., the original Xbox). Specifically, I’ve always wondered if it’s possible to use the original Xbox’s optical drive in order to read Xbox discs from Linux. I was never curious enough to actually buy an Xbox just to find out but I eventually came across a cast-off console on a recycle pile.

  I have long known that the Xbox has what appears to be a more or less standard optical drive with a 40-pin IDE connector. The only difference is the power adapter which I surmise is probably the easiest way to turn a bit of standardized hardware into a bit of proprietary hardware. The IDE and power connectors look like this :

  
  
  

  Thus, I wanted to try opening an Xbox and plugging the optical drive into a regular PC, albeit one that supports IDE cables, and allow the Xbox to supply power to the drive. Do you still have hardware laying around that has 40-pin IDE connectors ? I guess my Mac Mini PPC fits the bill, but I’ll be darned if I’m going to pry that thing open again. I have another IDE-capable machine buried in my closet, last called into service when I needed a computer with a native RS-232 port 3 years ago. The ordeal surrounding making this old computer useful right now can be another post entirely.

  Here’s what the monstrosity looks like thanks to characteristically short IDE cable lengths :

  
  

  

  Click for larger image

  
  

  Process :

  1. Turn on Xbox first
  2. Turn on PC

  Doing these things in the opposite order won’t work since the kernel really wants to see the drive when booting up. Inspecting the 'dmesg' log afterward reveals interesting items :
  

  <br />
hdd: PHILIPS XBOX DVD DRIVE, ATAPI CD/DVD-ROM drive<br />
hdd: host max PIO5 wanted PIO255(auto-tune) selected PIO4<br />
hdd: UDMA/33 mode selected<br />
[...]<br />
hdd: ATAPI DVD-ROM drive, 128kB Cache<br />

  Why is that interesting ? When is the last time to saw disk devices prefixed by ‘hd’ rather than ‘sd’ ? Blast from the past. Oh, and the optical drive’s vendor string clearly indicates that this is an Xbox drive saying ‘hi !’.

  Time To Read
  When I first studied an Xbox disc in a normal optical drive, I noticed that I was able to read 6992 2048-byte sectors — about 14 MB of data — as reported by the disc table of contents (TOC). This is just enough data to play a standard DVD video animation that kindly instructs the viewer to please use a proper Xbox. At this point, I estimated that there must be something special about Xbox optical drive firmware that knows how to read alternate information on these discs and access further sectors.

  I ran my TOC query tool with an Xbox Magazine demo disc in the optical drive and it reported substantially more than 6992 sectors, enough to account for more than 2 GB of data. That’s promising. I then tried running 'dd' against the device and it was able to read… about 14 MB, an exact quantity of bytes that, when divided by 2048 bytes/sector, yields 6992 sectors.

  Future (Past ?) Work
  Assuming Google is your primary window into the broader internet, the world is beginning to lose its memory of things pertaining to the original Xbox (Microsoft’s naming scheme certainly doesn’t help searches). What I’m saying is that it can be difficult to find information about this stuff now. However, I was able to learn that a host needs to perform a sort of cryptographic handshake with the drive at the SCSI level before it is allowed to access the forbidden areas of the disc. I think. I’m still investigating this and will hopefully post more soon.

• Evolution of Multimedia Fiefdoms

  1er octobre 2014, par Multimedia Mike — General

  I want to examine how multimedia fiefdoms have risen and fallen through the years.

  
  
  

  Back in the day, the multimedia fiefdoms were built around the formats put forth by competing companies : there was Microsoft/WMV, Apple/MOV, and Real/RM as the big contenders. On2 always wanted to be a player in this arena but could never quite catch a break. A few brave contenders held the line for open source and also for the power users who desired one application that could handle everything (my original motivation for wanting to get into multimedia hacking).

  The computer desktop was the battleground for internet-based media stream. Whatever happened to those days ? Actually, if memory serves, Flash-based video streaming stepped on all of them.

  Over the last 6-7 years, the battleground has expanded to cover mobile devices, where Flash’s impact has… lessened. During this time, multimedia technology pretty well standardized on a particular stack, namely, the MPEG (MP4/H.264/AAC) stack.

  The belligerents in this war tried for years to effectively penetrate new territory, namely, the living room where the television lived. This had been slowgoing for years due to various user interface and content issues, but steadily improved.

  Last April, Amazon announced their entry into the set-top box market with the Fire TV. That was when it suddenly crystallized for me that the multimedia ecosystem has radically shifted. Now, the multimedia fiefdoms revolve around access to content via streaming services.

  Off the top of my head, here are some of the fiefdoms these days (fiefdoms I have experience using) :

  • Netflix (subscription streaming)
  • Amazon (subscription, rental, and purchased streaming)
  • Hulu Plus (subscription streaming)
  • Apple (rental and purchased media)

  I checked some results on Can I Stream.It ? (which I refer to often) and found a bunch more streaming fiefdoms such as Google (both Play and YouTube, which are separate services), Sony, Xbox 360, Crackle, Redbox Instant, Vudu, Target Ticket, Epix, Sony, SnagFilms, and XFINITY StreamPix. And surely, these are probably just services available in the United States ; I know other geographical regions have their own fiefdoms.

  What happened ?

  When I got into multimedia hacking, there were all these disparate, competing ecosystems. As a consumer, I didn’t care where the media came from, I just wanted to play it. That’s what inspired me to work on open source multimedia projects. Now I realize that I have the same problem 10-15 years later : there are multiple competing ecosystems. I might subscribe to fiefdoms X and Y, but am frustrated to learn that something I’d like to watch is only available through fiefdom Z. Very few of these fiefdoms can be penetrated using open source technology.

  I’m not really sure about the point about this whole post. Multimedia technology seems really standardized these days. But that’s probably just my perspective because I have spent way too long focusing on a few areas of multimedia technology such as audio and video coding. It’s interesting that all these services probably leverage the same limited number of codecs. Their differentiation comes from the catalog of content that each is able to license for streaming. There are different problems to solve in the multimedia arena now.