How can I get Photos slideshows to show the full length MP4 movie files instead of being cut off after 1 second?
I just got a new iMac and am using Photos version 5.0 in Catalina. I'm coming from a very old 2.0 version of Photos. I've always interspersed still photos and short movie clips into my slideshow projects with no problems. In 5.0 my MP4 movie clips/files are only displaying the first 1 second or so before transitioning into the next file instead of showing the full length of the file. Is there a setting for this or did they just remove the capability of the app to include full length movie files in slide shows? This is a separate but somewhat related topic as well ---I also noticed that this current version of Photos doesn't seem to recognize AVCHD movie files? The old version had no problem with these but it seems as though I have to convert them now and then import them into Photos. I couldn't find topics related to these issues so any help would be greatly appreciated.
iMac 21.5″, OS X 10.11