Forgive me,I was preparing this imovie for my mothers funeral which has now taken place. Really didn't hv all that much time to play around w it..however
Effectively i kept trying to export the file and waited for the error file which would indicate the time slot that would not render..id go back to the imovie and replace the photo at that point w a new file, jpeg or png and try to export again. Fortunately after multiple attempts I could get to finally export the imovie but this now had a green section within! I had to snip that out w Adobe Express...or should I say a friend if mine did. Fortunately it was just a few frames so it did not effect the audio noticeably.
I am not exactly sure if it was the size and or type of photo file as the exported file was +2 GB and it contained 150 photos up to 50MB, 3 audio tracks max 4 MB, 1 video clip MB ...
Appreciate your help and suggestions a combination of which got me through the day. Now I have more time I may well try again to get to an end point w good quality photos within. Cheers