Even after unchecking VBR it still displays the following:

--------------------------------------------------------------
Multiplexing video and audio:

Scanning video stream for a sequence header ...

Scanning video stream for pictures ...
Found 79567 picture headers.
Video stream information
Stream length : 381673250
Total time (seconds) : 2654
Sequence start : 4601
Sequence end : 1
No. Pictures : 79567
No. Groups : 4601
No. I Frames : 4601 avg. size 21574 bytes
No. P Frames : 22318 avg. size 7690 bytes
No. B Frames : 52648 avg. size 2104 bytes
No. D Frames : 0 avg. size 0 bytes
Horizontal size : 352
Vertical size : 240
Aspect ratio : 1.0950
Picture rate : 29.970 frames/sec
Bit rate : 143750 bytes/sec (1150000 bits/sec)
Computed avg rate : 145000 bytes/sec (1160000 bits/sec)
Computed max rate : 179050 bytes/sec (1432400 bits/sec)
Vbv buffer size : 40960 bytes
CSPF : 1

Scanning audio stream for access units information
Found 101631 audio frame headers.
MPEG audio stream information
Stream length : 42477610
Syncwords : 101631
Frames : 4148 size 417 bytes
Frames : 97483 size 418 bytes
Layer : 2
CRC checksums : yes
Bit rate : 16000 bytes/sec (128 kbit/sec)
Frequency : 44.1 kHz
Mode : 2 dual channel
Mode extension : 0
Copyright bit : 1 copyright protected
Original/Copy : 1 original
Emphasis : 0 none

Multiplexing information
Video stream data rate : 143750 bytes/sec (1150000 bits/sec)
Audio stream 1 data rate : 16000 bytes/sec (128000 bits/sec)
Overhead data rate : 2100 bytes/sec (16800 bits/sec)
Total data rate : 161850 bytes/sec (1294800 bits/sec)

Multiplexing file temp.mpg
video PTS (8985.57ms) underflow at pack 589 by 8.63ms
video PTS (16726.63ms) underflow at pack 1124 by 21.19ms
video PTS (16826.73ms) underflow at pack 1133 by 51.52ms
video PTS (16926.83ms) underflow at pack 1138 by 23.89ms
video PTS (17227.13ms) underflow at pack 1161 by 56.92ms
----------------All the way down until it reached end of movie--------------