Hi,
As Dane_B says, if you can disable the camera writing a new daily folder, then the way I have been shown will work.
The server has one folders and within this 3 other sub-folders, the 1st contains the .php script which does the magic, the 2nd is the folder where the renamed image lives and the 3rd folder is where the camera sends its image with the ever changing details.
I use cron-jobs.org to get the .php script to run every 5 minutes, what this does is copy the image from folder 3 into folder 2 and renames it to a name that doesnt change and after doing that, it deletes the image in folder 3.
Ive attached how my folder structure looks and the script .
Hope that helps.
Ian