From 1f2d2790eed7f5bec84e52e63dc40d46ef170150 Mon Sep 17 00:00:00 2001
From: Silvio <silvio@devlet.com.br>
Date: Wed, 27 Jul 2011 16:26:39 -0300
Subject: Checks if ffmpeg extension is available at video_ffmpeg_php
 transcoder

---
 transcoders/video_ffmpeg_php.inc | 40 ++++++++++++++++++++++++++++++++++++----
 1 file changed, 36 insertions(+), 4 deletions(-)

diff --git a/transcoders/video_ffmpeg_php.inc b/transcoders/video_ffmpeg_php.inc
index 2569616..f22c6cb 100644
--- a/transcoders/video_ffmpeg_php.inc
+++ b/transcoders/video_ffmpeg_php.inc
@@ -21,6 +21,25 @@ class video_ffmpeg_php extends video_ffmpeg implements transcoder_interface {
     parent::__construct();
   }
 
+  /**
+   * Load a movie.
+   *
+   * @param $videopath
+   *   Video file path.
+   *
+   * @return
+   *   An ffmpeg_movie object on success, FALSE otherwise.
+   */
+  private function load_movie($videopath) {
+    if(!extension_loaded('ffmpeg')) {
+      $error_msg = t("Extension ffmpeg-php not available.");
+      watchdog('transcoder', $error_msg, array(), WATCHDOG_ERROR);
+      return FALSE;
+    }
+
+    return new ffmpeg_movie($videopath);
+  }
+
   /**
    * Generate video thumbs.
    */
@@ -48,7 +67,12 @@ class video_ffmpeg_php extends video_ffmpeg implements transcoder_interface {
       //skip files already exists, this will save ffmpeg traffic
       if (!is_file(drupal_realpath($thumbfile))) {
         // Use PHP-FFMPEG
-        $movie  = new ffmpeg_movie($videopath);
+        $movie = $this->load_movie($videopath);
+
+        if (!$movie) {
+          return $files;
+        }
+
         $frames = $movie->getFrameCount();
         $fps    = $movie->getFrameRate();
 
@@ -88,15 +112,23 @@ class video_ffmpeg_php extends video_ffmpeg implements transcoder_interface {
    * Return the playtime seconds of a video
    */
   public function get_playtime($video) {
-    $movie = new ffmpeg_movie($video);
-    return $movie->getDuration();
+    $movie = $this->load_movie($video);
+    return (!$movie) ? 0 : $movie->getDuration();
   }
 
   /**
    * Return the dimensions of a video
    */
   public function get_dimensions($video) {
-    $movie         = new ffmpeg_movie($video);
+    $movie         = $this->load_movie($video);
+
+    if (!$movie) {
+      return array(
+        'width'  => 0,
+        'height' => 0,
+        );
+    }
+
     $res['width']  = $movie->getFrameWidth();
     $res['height'] = $movie->getFrameHeight();
     return $res;
-- 
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