Does Ejabberd/Erlang support any thumbnail generation by any means (compression logic)?

Hi,

I am dubious about the approach usually followed by popular Chat applications like Whatsapp, Wechat etc. It is seen that these apps share a low -resolution blurred out image of the actual image/video file. How is this managed?

My concern is the space management at the server end. Does the client process the original image and create a low-res version and sends 2 requests (Original+blurred file) to the server? Following which, the blurred image being lower in size is shared with others who trigger a GET request for the original image/video file.

Or does the server itself does some processing one the Original file received and make a low-res version out of it. And proceeds as above.

In both cases i could think of, space is being eaten up at the server end with 2 instances of each image/video being shared.

Ques 2:
Does ErlangOTP support any compression logic which would generate a fuzzy/blurred thumbnail image of the original image. Because in that case 2 requests won't be required but processing can be done using OTP.

Kindly let me know how this is genrally carried out. Would be grateful!