Try turning on Frame Blending for the clips that are speed-altered. Just right-click them and check Frame Blend. Test if that's any better.
I'll try that, thank you.
Right now I am playing around with Jell Bellune's tutorial on HD2SD (resizing) but it looks like the time to compress and the file sizes are pretty ridiculous... But I'll still give it a go and see what happens.
Another thing I noticed is durring disolves between shots it disolves in bands instead of evenly- this may be a different issue though so I'll look into that later...
Thank you again!
My first test using frame blending in both the timeline and in the export settings (but not both at once) seem pretty good at removing the lines. I'll try the rest of the videos tonight and see what happens.
Thank you again so far!