# нужно наличие модуля: with-http_image_filter_module

location ~ ^/([0-9]+)/([0-9]+)/http/([0-9a-zA-Z\-\.]+)/(.+) {
    resolver 8.8.8.8;
    proxy_pass http://$3/$4;
    proxy_read_timeout 60;
    proxy_set_header Host $3;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header realip $remote_addr;
    image_filter test;
    image_filter_buffer 2M;
    image_filter resize $1 $2;
    image_filter_jpeg_quality 75;
    error_page 415 = /415.png;
    }

location ~ ^/([0-9]+)/([0-9]+)/https/([0-9a-zA-Z\-\.]+)/(.+) {
    resolver 8.8.8.8;
    proxy_pass https://$3/$4;
    proxy_read_timeout 60;
    proxy_set_header Host $3;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header realip $remote_addr;
    image_filter test;
    image_filter_buffer 2M;
    image_filter resize $1 $2;
    image_filter_jpeg_quality 75;
    error_page 415 = /415.png;
    }