How do I make a seamles quicktime panorama?

I’m not sure if this is the right place to post this. Anyways, here’s my problem:

I’ve been trying to make a quicktime vr panorama using Blender and Gocubic. I followed all the instructions carefully (camera lens set to 16, size x & size y of the rendered image are the same …). When I combine the rendered images in Gocubic some seams appear. Why is that and how do I get rid of those seams.

i don’t think lens=16 is still the right setting, i believe something like 24 should work. let me do the math…