getFFMpeg(); $files = [ realpath(__DIR__ . '/../files/Jahzzar_-_05_-_Siesta.mp3'), realpath(__DIR__ . '/../files/02_-_Favorite_Secrets.mp3'), ]; $audio = $ffmpeg->open(reset($files)); $this->assertInstanceOf('FFMpeg\Media\Audio', $audio); clearstatcache(); $filename = __DIR__ . '/output/concat-output.mp3'; $audio->concat($files)->saveFromSameCodecs($filename, true); $this->assertFileExists($filename); unlink($filename); } }