Unwanted image formats on multiple devices
What is "Live Photo"? It seems to create a whole stream of slightly different exposures which simply take up space and appear to be pointless. If taken on an iPad (A16) and transferred to an iMac some are ".mov" and some are ".jpg". This causes confusion as the images are sometimes the same.
How do I sort out this mess? Can I remove the "Live Photo" version on the iPad to create a proper jpg version acceptable by any normal device (such as a commercial photo print shop).
Whilst on the subject of image formats I do not want to use the ".heic" format and need to convert a whole set of them back to ".jpg" before transferring them to another device. They currently fail on some devices.
The reason for this request is that this family has a number of devices manufactured by various suppliers including Apple (majority) and of various age which include at the last count iMac, MacBook Pro, iPad, several android phones and at least 3 scanners. We need consistancy.
iMac 27″, macOS 10.13