knp_snappy:
    temporary_folder: "%kernel.cache_dir%/snappy"  
    pdf:
        enabled:    true
        binary:     'xvfb-run -- /usr/bin/wkhtmltopdf'
        options:    
          enable-javascript: true
          javascript-delay: 1000
          no-stop-slow-scripts: true
    image:
        enabled:    true
        binary:     '/var/www/html/ninesurvey/scripts/wkhtmltopdf/wkhtmltoimage'
        options:    []