Bug video reading issue with the http range

Should fix #954

Author: leobouilloux

core/src/plugins/editor.video/class.VideoReader.php

@@ -75,7 +75,8 @@ public function switchAction($action, $httpVars, $filesVars)
                     $this->logInfo('Preview', 'Streaming content of '.$file);
                 }
 
-                $length = floatval($offsets[1]) - $offset;
+                $length = floatval($offsets[1]) - $offset + 1;
+
                 if (!$length) $length = $filesize - $offset;
                 if ($length + $offset > $filesize || $length < 0) $length = $filesize - $offset;
                 header('HTTP/1.1 206 Partial Content');
@@ -98,7 +99,12 @@ public function switchAction($action, $httpVars, $filesVars)
                 while(ob_get_level()) ob_end_flush();
                 $readSize = 0.0;
                 while (!feof($file) && $readSize < $length && connection_status() == 0) {
-                    echo fread($file, 2048);
+                    if ($length < 2048){
+                        echo fread($file, $length);
+                    } else {
+                        echo fread($file, 2048);
+                    }
+
                     $readSize += 2048.0;
                     flush();
                 }