Pimcore\Video\Adapter\Ffmpeg::scaleByWidth PHP Method

    public function scaleByWidth($width)
    {
        // ensure $width is even (mp4 requires this)
        $width = ceil($width / 2) * 2;
        $this->addArgument("scaleByWidth", '-vf "scale=' . $width . ':trunc(ow/a/vsub)*vsub"');
    }