protected static function is_minimum_version_met() {
        global $CFG;

        $currentversion = 0;
        $supportedversion = 0.7;
        $unoconvbin = \escapeshellarg($CFG->pathtounoconv);
        $command = "$unoconvbin --version";
        exec($command, $output);

        // If the command execution returned some output, then get the unoconv version.
        if ($output) {
            foreach ($output as $response) {
                if (preg_match('/unoconv (\\d+\\.\\d+)/', $response, $matches)) {
                    $currentversion = (float) $matches[1];
                }
            }
            if ($currentversion < $supportedversion) {
                return false;
            } else {
                return true;
            }
        }

        return false;
    }