diff --git a/src/FFMpeg/Filters/Video/ExtractMultipleFramesFilter.php b/src/FFMpeg/Filters/Video/ExtractMultipleFramesFilter.php
index bc8fa66..d2f79bb 100644
--- a/src/FFMpeg/Filters/Video/ExtractMultipleFramesFilter.php
+++ b/src/FFMpeg/Filters/Video/ExtractMultipleFramesFilter.php
@@ -37,6 +37,9 @@ class ExtractMultipleFramesFilter implements VideoFilterInterface
     private $destinationFolder;
     private $frameFileType = 'jpg';
 
+    /** @var array */
+    private static $supportedFrameFileTypes = ['jpg', 'jpeg', 'png'];
+
     public function __construct($frameRate = self::FRAMERATE_EVERY_SEC, $destinationFolder = __DIR__, $priority = 0)
     {
         $this->priority = $priority;
@@ -52,9 +55,16 @@ class ExtractMultipleFramesFilter implements VideoFilterInterface
 
 	/**
 	 * @param string $frameFileType
+	 * @throws \FFMpeg\Exception\InvalidArgumentException
+	 * @return ExtractMultipleFramesFilter
 	 */
     public function setFrameFileType($frameFileType) {
-    	$this->frameFileType = $frameFileType;
+    	if (in_array($frameFileType, self::$supportedFrameFileTypes)) {
+    		$this->frameFileType = $frameFileType;
+    		return $this;
+    	}
+
+    	throw new InvalidArgumentException('Invalid frame file type, use: ' . implode(',', self::$supportedFrameFileTypes));
     }
 
     /**
diff --git a/tests/Unit/Filters/Video/ExtractMultipleFramesFilterTest.php b/tests/Unit/Filters/Video/ExtractMultipleFramesFilterTest.php
index db14ab4..ee20dea 100644
--- a/tests/Unit/Filters/Video/ExtractMultipleFramesFilterTest.php
+++ b/tests/Unit/Filters/Video/ExtractMultipleFramesFilterTest.php
@@ -41,18 +41,34 @@ class ExtractMultipleFramesFilterTest extends TestCase
     public function provideFrameRates()
     {
         return array(
-            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_SEC,'jpg', '/', 100, 2, array('-vf', 'fps=1/1', '/frame-%03d.jpg')),
-            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_2SEC,'jpg', '/', 100, 2, array('-vf', 'fps=1/2', '/frame-%02d.jpg')),
-            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_5SEC,'jpg', '/', 100, 2, array('-vf', 'fps=1/5', '/frame-%02d.jpg')),
-            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_10SEC,'jpg', '/', 100, 2, array('-vf', 'fps=1/10', '/frame-%02d.jpg')),
-            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_30SEC,'jpg', '/', 100, 2, array('-vf', 'fps=1/30', '/frame-%02d.jpg')),
-            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_60SEC,'jpg', '/', 100, 2, array('-vf', 'fps=1/60', '/frame-%02d.jpg')),
-            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_SEC,'png', '/', 100, 2, array('-vf', 'fps=1/1', '/frame-%03d.png')),
-            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_2SEC,'png', '/', 100, 2, array('-vf', 'fps=1/2', '/frame-%02d.png')),
-            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_5SEC,'png', '/', 100, 2, array('-vf', 'fps=1/5', '/frame-%02d.png')),
-            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_10SEC,'png', '/', 100, 2, array('-vf', 'fps=1/10', '/frame-%02d.png')),
-            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_30SEC,'png', '/', 100, 2, array('-vf', 'fps=1/30', '/frame-%02d.png')),
-            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_60SEC,'png', '/', 100, 2, array('-vf', 'fps=1/60', '/frame-%02d.png')),
+            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_SEC, 'jpg', '/', 100, 2, array('-vf', 'fps=1/1', '/frame-%03d.jpg')),
+            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_2SEC, 'jpg', '/', 100, 2, array('-vf', 'fps=1/2', '/frame-%02d.jpg')),
+            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_5SEC, 'jpg', '/', 100, 2, array('-vf', 'fps=1/5', '/frame-%02d.jpg')),
+            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_10SEC, 'jpg', '/', 100, 2, array('-vf', 'fps=1/10', '/frame-%02d.jpg')),
+            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_30SEC, 'jpg', '/', 100, 2, array('-vf', 'fps=1/30', '/frame-%02d.jpg')),
+            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_60SEC, 'jpg', '/', 100, 2, array('-vf', 'fps=1/60', '/frame-%02d.jpg')),
+
+            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_SEC, 'jpeg', '/', 100, 2, array('-vf', 'fps=1/1', '/frame-%03d.jpeg')),
+            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_2SEC, 'jpeg', '/', 100, 2, array('-vf', 'fps=1/2', '/frame-%02d.jpeg')),
+            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_5SEC, 'jpeg', '/', 100, 2, array('-vf', 'fps=1/5', '/frame-%02d.jpeg')),
+            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_10SEC, 'jpeg', '/', 100, 2, array('-vf', 'fps=1/10', '/frame-%02d.jpeg')),
+            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_30SEC, 'jpeg', '/', 100, 2, array('-vf', 'fps=1/30', '/frame-%02d.jpeg')),
+            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_60SEC, 'jpeg', '/', 100, 2, array('-vf', 'fps=1/60', '/frame-%02d.jpeg')),
+
+            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_SEC, 'png', '/', 100, 2, array('-vf', 'fps=1/1', '/frame-%03d.png')),
+            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_2SEC, 'png', '/', 100, 2, array('-vf', 'fps=1/2', '/frame-%02d.png')),
+            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_5SEC, 'png', '/', 100, 2, array('-vf', 'fps=1/5', '/frame-%02d.png')),
+            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_10SEC, 'png', '/', 100, 2, array('-vf', 'fps=1/10', '/frame-%02d.png')),
+            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_30SEC, 'png', '/', 100, 2, array('-vf', 'fps=1/30', '/frame-%02d.png')),
+            array(ExtractMultipleFramesFilter::FRAMERATE_EVERY_60SEC, 'png', '/', 100, 2, array('-vf', 'fps=1/60', '/frame-%02d.png')),
         );
     }
+
+    /**
+     * @expectedException \FFMpeg\Exception\InvalidArgumentException
+     */
+    public function testInvalidFrameFileType() {
+    	$filter = new ExtractMultipleFramesFilter('1/1', '/');
+        $filter->setFrameFileType('webm');
+    }
 }