TMPGEnc adds a lot of black to the end of my clip

[Webshark2k]

I've been having all kinds of problems converting an XVid file to either m2v or mpg. I really just want to convet it so that I can burn it to DVD and keep the 16x9 aspect ratio. Right at the moment if I simply use a DVD authoring program (I've tried Roxio DVD Builder, Ulead Movie Factory 3, and Sonic DVDit!) the picture will be squeezed to 4:3.

I used TMPGEnc with 2 pass VBR, but when it came to the second pass the program would quit because of an error (something about the checksum didn't match up with the first pass). So I tried Manual VBR and it worked, except that my file went from 42min and 22sec to 2hrs 5min and 37sec. After the 42min and 22sec mark it just goes to black.

Does anyone know why TMPGEnc might be freezing up with 2 pass VBR or why it's adding all that black with manual VBR?

Thanks

File info from G-Spot:
Duration 42min 22sec
XVid
Aspect Ratio: 608x336 (1.81:1)
Bitrate: 1014 kb/s
fps: 23.976
Qf: 0.207 bits/pixel

Settings in TMPGEnc:
Stream Type: MPEG-2 Video
Size: 720x480 pixels
Aspect Ratio: 16x9 Display
Frame Rate: 23.976 fps

Rate Control Mode: Manual VBR (MVBR)
Maximum Bitrate: 9000, Minimum: 5,000
Enable padding not to be lower than minimum bitrate (checked)
P picture spoilage: 0
B picture spoilage: 20

Profile & Level: Main Profile & Main Level (MP@ML)
Video Format: NTSC
Encode Mode: Non-Interlaced
YUV Format: 4:2:0
DC Component Precision: 10 bits

Motion Search Precision: Highest Quality (Very Slow)

Advanced
Video Source Type: Non-Interlace (Progressive)
Field Order: Bottom Field First (field B)
Source Aspect Ratio: 16:9 525 line (NTSC)
Video Arrange Method: Full Screen (keep aspect ratio)

(Nothing Checked Below)

[ZippyP.]

From this link.

"If TMPGEnc says that the video time / runtime is way too long
TMPGEnc keeps encoding after the end of video with only a black screen
Try change the directshow reader priority, in TMPGEnc under Option->Environmental settings->VFAPI plug-in and right click on the DirectShow Multimedia File Reader and increase the priority to 2 or to the top of the plugin-list and reopen the video.
If that doesn't help try convert the audio to WAV audio before converting and use the wav as audio source.
And if all that didn't help you can always use the source range to select exact what to encode, under Settings->Advanced in TMPGEnc. "