And again, until now you still have not provided proper detailed
information about your project settings, the source of these footages,
nor your render settings for any of us to truly point out where you
are going wrong!
Anyway:
Try this method and lets see what happens: make a loop region over everything
on the timeline when you are ready to render, then when done extend the end
of the loop region to an extra one second exactly. Now render with
“Render loop region only” selected.
Steve Rhoden (Cow Leader)
Film Maker & VFX Artist.
Owner of Filmex Creative Media.
Samples of my Work and Company can be seen here:
https://www.facebook.com/FilmexCreativeMedia