webp wordpress

Hello,

i have tried to use Webp with wordpress uploads file, if i write the path like this

Code:

/root/tools/optimise-images/optimise-images.sh optimise /home/nginx/domains/3alamtaney.com/public/wp-content/uploads

it says that there is no images to optimize, but if i write it like this it works because this is the parent that actually have images

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Code:

/root/tools/optimise-images/optimise-images.sh optimise /home/nginx/domains/3alamtaney.com/public/wp-content/uploads/2014/06

now is there a syntax through it it can scan the entire uploads folder and optimize all the images included, without the need to define the last folder containing images ?