6hr encoding with 'QuEnc CBR 1-pass' profile? What kind of footage are you converting to DVD? Supposing that your footage lasts 2 hours, it means that you are going with 8-10 fps.
Hints to speed up:
- Use LinearResize
- Select 'Half-D1' or 'VCD' as video resolution
- Assuming you are still using QuEnc, toggle on 'Edit Encoder Command Parameters at runtime' and change '-hq' with '-nohq'.
Afterward, do not complain about quality...
Bye