04-26-2018 01:30 AM
Samsung/Galaxy and Quik don't work well together. Reason is simple: Samsung puts a limit on the number of video decoder available (3) which isn't enough to decode simultaneously several videos (which is needed for transitions between videos) the higher the resolution of the video, the more decoders are needed
Because of this lack of available decoders you'll get those stuttering effects during transitions.
Best is to try the process I've explained in this thread / try with lower resolution footage.
I'm sorry I wish I could have something else but I don't.