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• How to install ffmpeg

  9 mars 2016, 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 ?

• How can I seek to frame No. X with ffmpeg ?

  27 août 2018, par Giumo

  I’m writing a video editor, and I need to seek to exact frame, knowing the frame number.

  Other posts on stackoverflow told me that ffmpeg may give me a few broken frames after seeking, which is not a problem for playback but a big problem for video editors.

  And I need to seek by frame number, not by time, which will become inaccurate when converted to frame number.

  I’ve read dranger’s tuts (which is outdated now), and end up with :

  av_seek_frame(fmt_ctx, video_stream_id, frame, AVSEEK_FLAG_ANY);

  It always seek to frame No. 0, and always return 0 which means success.
  Then I tried to read Blender’s source code and found it really complex(maybe I should implement an image buffer ?).

  So, is there any simple way to seek to a frame with just a simple call like seek(context, frame_number)(while getting a full frame, not a broken one) ? Or, is there any lightweight library that simplifies this ?

  EDIT :
  Thanks to praks411，I found the solution :

  void AV_seek(AV * av, size_t frame)
  
  {
  
      int frame_delta = frame - av->frame_id;
  
      if (frame_delta < 0 || frame_delta > 5)
  
          av_seek_frame(av->fmt_ctx, av->video_stream_id,
  
                  frame, AVSEEK_FLAG_BACKWARD);
  
      while (av->frame_id != frame)
  
          AV_read_frame(av);
  
  }
  
  
  
  void AV_read_frame(AV * av)
  
  {
  
      AVPacket packet;
  
      int frame_done;
  
  
  
      while (av_read_frame(av->fmt_ctx, &packet) >= 0) {
  
          if (packet.stream_index == av->video_stream_id) {
  
              avcodec_decode_video2(av->codec_ctx, av->frame, &frame_done, &packet);
  
              if (frame_done) {
  
                  ...
  
                  av->frame_id = packet.dts;
  
                  av_free_packet(&packet);
  
                  return;
  
              }
  
          }
  
          av_free_packet(&packet);
  
      }
  
  }

  EDIT2 :
  Turns out there is a library for this : FFMS2.
  It is "an FFmpeg based source library [...] for easy frame accurate access", and is portable (at least across Windows and Linux).

• 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 ?