On page 348 of the ESP32 cam projects ebook I purchased I copied the code to clipboard and installed. The trouble is every “Encode” node shows up as “unknown base64”. This is the node between “multipart decoder” and “limit 4 msg/s”
What’s the version of the eBook that you have?
There was an instruction missing in version 1.1. Version 1.2 is already fixed. You can download it at the following link:
Basically, you need to install the base64 node as shown on page 353 of the ESP32-CAM Projects eBook version 1.2.
I hope this helps.