+/**
+ * Returns information about an Audio/Video file.
+ *
+ * @param string $file_name Audio/Video file
+ * @return dictionary a dictionary of audio/video properties with keys:
+ * <ul>
+ * <li>width</li>
+ * <li>height</li>
+ * <li>dar (display aspect ratio)</li>
+ * <li>duration (formated as [HH:]mm:ss)</li>
+ * <li>size (in bytes)</li>
+ * </ul>
+ */
+function get_av_info($file_name)
+{
+ // TODO use ffprobe to return width, height, DAR, duration and size of a video
+
+ return array('width'=> 800, 'height'=> 600, 'dar'=> '16:9',
+ 'duration'=> '00:10', 'size'=> 1101693);
+}
+