Photos Slideshow Transitions Stuttering Continues

Mario, I found a fix, but it is not in Photos. See below.

Photos Slideshow Transition Stutter Solved

1.     In Photos, create the slideshow, complete with all the trimmings, including music, titles etc.

2.     In Photos, export the slideshow in whatever resolution you choose.

3.     Quit Photos and open IMovie.

4.     In iMovie, create a new project, choose  import  media and import the slideshow video you just exported from Photos.

5.     Drag the slideshow from the Media browser to the Timeline.

6.     Select the maximum zoom and select play.

7.     When you notice the first transition stutter press the space bar and pause the video.

8.     Carefully, move the skimmer back across the transition slowly until you see the Frame that is causing the stutter.

9.     While the playhead skimmer  is on that frame, choose Split Frame.

10.  Now drag the beginning of the clip on the right to the right a bit until a small gap with a filled rectangle appears between the two clips.

That’s it.  If you move the skimmer back to before that transition and press play, you’ll see that the key frame that was erroneously inserted in the transition no longer shows.  Yet the music or sound is unaffected across the edited transition.  You’ll have to do this for every case of transition stutter but, frankly, that takes little time and effort.

Hello Mario49,

The problem still exists in "Safe Mode". Others have tried "Safe Mode" and had the problem persist, as you can tell from reading the multiple threads concerning this problem. By the way, when I look closely at the stuttering transitions (by importing the .mp4 into Final Cut Pro), I note that within the smooth transition one of the key frames appears in all of its full resolution for a brief moment, thus causing the "stuttering" effect.

To be clear, the music tracks are unaffected even when the simultaneous video stutters at transitions.