Videos Burned to Blu ray Problems (zoomed in or cut in half)

Hey i'm a noob to burning movies onto my bd-r's.
I converted my mkv videos to bdmv's so they can play on my ps3
using tsMuxer and then i burned them onto the disc using ImgBurn.
The first video was 1080p and only showed half the video at the top of the screen
while the bottom half was completely black. The second video I tried was 720p
and was zoomed into only 1/4 of the actual video. I followed the guides but my
videos never turn out right. I'd appreciate the help if anyone can tell me what I am
doing wrong or what I should be doing.

Thanks