Slow video conversion taking days

When converting videos from dual lens to 360 videos, on Win10 the Ricoh Theta App 3.15.4 converts from a Theta V 1920x960 pixels MP4 file 210MB size, and it takes 1 day to reach 21%. So I will leave the program on for a few more days to finish this one file.

Is this normal ??

How does everyone convert for multiple video files from a Theta V efficiently ?

this is not normal.

Post your camera firmware version and OS specifications (from the Windows System About) in the Windows settings.