Added the BC Layer alias for some phpunit methods to fix build at php <= 5.5.

src/FFMpeg/Filters/ComplexMedia/TestSrcFilter.php

@@ -199,6 +199,31 @@ class TestSrcFilter extends AbstractComplexFilter
         return $this->type;
     }
 
+    /**
+     * Get minimal version of ffmpeg starting with which this filter is supported.
+     *
+     * @return string
+     */
+    public function getMinimalFFMpegVersion()
+    {
+        switch ($this->type) {
+            case self::PAL75BARS:
+            case self::PAL100BARS:
+                return '4.1';
+            case self::YUVTESTSRC:
+                return '3.2';
+            case self::ALLRGB:
+            case self::ALLYUV:
+                return '2.8';
+            case self::SMPTEHDBARS:
+                return '2.0';
+            case self::SMPTEBARS:
+                return '1.0';
+            default:
+                return '0.3';
+        }
+    }
+
     /**
      * {@inheritdoc}
      */