I know this is an old topic but I have been looking for a solution. I use xLights for sequences. I use FPP to run said sequences. Latest version on both. I have schedules set to run for my Christmas show every half hour. I too would like to either have the ending time of the schedule to shut off the sequence at the end time or the starting scheduled time to end any running schedule and start my schedule on time. The way it works now is that times are just suggestions. Hey, FPP when you get around to it can you end or start this schedule. For me its important that the scheduled times are kept no matter what is playing. Hard stops at the end of the schedule are even a hard start where it might stop any running schedule and then starts the new one; the hard stop would be better, but either would be better. I try to use the stop script but sometimes it stops then tries to repeat the schedule again. Also why do all my schedules not allow me to not repeat. I cannot uncheck repeat. Every time they start they have repeat checked.
P.S. I'm not a newbie if anyone is wondering. This is my third holiday season using FPP to run my xLight shows, and I have been a member for just under three years.
Thanks,
Jay