Just upgraded from LRT2 and LR4 to LRT3 and LR5 and done my first HG time-lapse with the new software.

Viewing the resultant video it had several jumps in it (not changes in brightness/exposure but jumps of the image)

Looking back at the data in LRT I can see that for each of the left and right HG keyframes there has been a cropping of the image. Of the 500 or so frames only the 10 frames have this crop applied (all the HG keyframes) while ALL the other frames have no crop factor applied. It is these 2 cropped images at each Hg keyframe that has produced jump in the video.

Have i done something wrong? Why has this happened?

Ian

Maybe something with the initialization screwed up. Just make sure that all crops are the same (normally LRTimelapse will give you a warning, if not). Right click on the table column header of one of the crop columns and hit "Initialize Column". Then save and load all Metadata into Lightroom again (clear filters before). Then export via LRTExport again.