pb.redirectErrorStream(true);

            if (logger.isDebugEnabled()) {
                logger.debug("Thumbnail Command: {}", cmdList);
            }

            final Process p = pb.start();

            final InputStreamThread ist = new InputStreamThread(p.getInputStream(), Charset.defaultCharset(), 0, s -> {
                if (logger.isDebugEnabled()) {
                    logger.debug(s);