In tmpgenc, try this:
Click on Setting, beside Rate Control Mode, and set average bitrate to 4670.
On the Advanced tab, set Source aspect 1:1
Keep aspect ratio 2.
Your problem in encoding comes from the source file being 23.976fps, and your encode being 29.97 fps (dvd standard). We fix this by encoding at 23.976, and using something called 3:2 pulldown. This set's a "flag" in the file, telling the dvd player how to play it properly.