Help, getting weird banding when downsizing title to 720p from Full HD

Question

Hi there, I hope someone can explain what is happening with this project.
Someone made some video intros for me in Full HD 1928x1080. When I make same resolution MPEG from it in Elements 9, it comes out fine.
But when I output to my usual 720p (1280x720p), I get some weird banding, no matter what format I input and what format I output.
I'm not sure why this is, and more importantly, what do I need to get it export properly at 720p. Perhaps I need it in 720?
I've uploaded a sample clip here: http://www.elevatedmarketing.ca/wp-content/media/video-sample-error.zip
In it are three versions of the intro video at full HD resolution, 1928x1080
4.mov
4.mp4
4.wmv
and a video made downsized to 1280x720 where you'll notice the effors in the sample video.
Sample error Eat M.wmv
Any feedback is appreciated

Answer 1

The danger in letting someone else create video clips for you is that you don't know for sure what codecs and other specs they're using for their videos. And that makes it hard to find a project preset that matches the footage.
When you say that the 1920x1080 footage your friend made works fine in Premiere Elements, do you mean that when you add the clips to the timeline there are no red lines above the clips? If you do see red lines above these clips, it means that you haven't got a match between your project settings and your video -- and that could definitely account for the issues with your output.
Also, you say you're outputting to 1280x720p. There are actually a number of ways to create a video at this resolution. What do you plan to do with this 720p footage? That could determine your best output settings. It could be that the output settings you're using aren't the ideal format for the player you're using to view them. (BTW, what viewer are you using to play them?)
Finally, if you could, can you post a sample of this output video to YouTube, Vimeo or Muvipix so that we can see the issues you're describing, that would be very helpful. Like many others on this forum, I'd prefer not to download and open a zip file from a stranger. No offense.