What I need is a new function that replaces the ESP32-CAM function fb->buf. How can I create an image file buffer (which is what I assume fb->buf does) that is then used to Base64 encode later on?

The aim of my project is to take a screen capture of a TFT and upload it to Google Drive. I am using the FeatherWing 3.5" with onboard SD and Feather Huzzah esp8266. I have all the code worked out to take and make the image and am now trying to adapt an espCam project that uploads, however, I'm runn...