I use the AWP Classifieds plugin on a site. Large images (say, bigger than 2K pixels width) hang up the submit an ad page. The ad won't process.
I have image upload limit size within AWP Classifieds set to 10 MB since that's what Craigslist allows, and people will want to upload direct from their phones. I believe not allowing this will be a deal-killer usability issue.
Seems like all the image resizers, Smush, Imsanity etc, only resize within WP after upload. I found one that resizes on the server-- Resize Images Before Upload-- but wordpress.org warns that it hasn't been tested with the latest 3 major WP releases.
Anybody know of a way to do all this?