Decompression for default file uploads via webform

Hi

is there any functionality, or additional module that will decompress file uploads via webform?

my webform is here and uses default file upload functionality http://www.dcpv.co.uk/site/welcome-our-line-service.html

as it is, especially as there are over 10 files to upload, its open to a timeout if someone uploads files that are large, which will prob be the case as most users will be uploading straight off camera i would imagine, and asking to optimise before upload would be a big ask i think, so... i would like to be able automatically to decompress and optimise on upload

is there anything out there that will do this?