No preview for the CR2 folders

Hello,

i am using plex to store and organize pictures taken by my canon digital camera, but there is a problem, 'cause i prefere the RAW (CR2) format, so all my pictures CR2 images are, but PLEX doesn’t show any previews for these types of folders. Is there any workaround you know?

Thanks

DCIM 2016 and DCIM 2015 contain CR2 images only, DCIM 2014 contains some JPEG