Added ffmpeg version checking in the ComplexMediaTest::testXStackFilter().

src/FFMpeg/Filters/ComplexMedia/XStackFilter.php

@@ -12,6 +12,7 @@ use FFMpeg\Media\ComplexMedia;
  */
 class XStackFilter extends AbstractComplexFilter
 {
+    const MINIMAL_FFMPEG_VERSION = '4.1';
     const LAYOUT_2X2 = '0_0|0_h0|w0_0|w0_h0';
     const LAYOUT_1X4 = '0_0|0_h0|0_h0+h1|0_h0+h1+h2';
     const LAYOUT_3X3 = '0_0|0_h0|0_h0+h1|w0_0|w0_h0|w0_h0+h1|w0+w3_0|w0+w3_h0|w0+w3_h0+h1';

tests/Functional/ComplexMediaTest.php

@@ -156,6 +156,14 @@ class ComplexMediaTest extends FunctionalTestCase
     public function testXStackFilter()
     {
         $ffmpeg = $this->getFFMpeg();
+        $ffmpegVersion = $this->getFFMpegVersion();
+        if (version_compare($ffmpegVersion, XStackFilter::MINIMAL_FFMPEG_VERSION) === -1) {
+            $this->markTestSkipped('XStack filter is supported starting from '
+                . XStackFilter::MINIMAL_FFMPEG_VERSION . ' ffmpeg version, your version is '
+                . $ffmpegVersion);
+            return;
+        }
+
         $inputs = array(realpath(__DIR__ . '/../files/Test.ogv'));
         $format = new X264('aac', 'libx264');
         $output = __DIR__ . '/output/' . self::PATH_PREFIX . 'xstack_test.mp4';

tests/Functional/FunctionalTestCase.php

@@ -14,4 +14,16 @@ abstract class FunctionalTestCase extends TestCase
     {
         return FFMpeg::create(array('timeout' => 300));
     }
+
+    /**
+     * Get ffmpeg version.
+     *
+     * @return string
+     */
+    public function getFFMpegVersion()
+    {
+        preg_match('#version\s(\S+)#',
+            $this->getFFMpeg()->getFFMpegDriver()->command('-version'), $version);
+        return $version[1];
+    }
 }