DVDit! problem

[adied]

Currently using DVDit! SE and had no problems creating DVD folders for later burning until last week when i tried and it came up with a warning message saying 'Each GOP header must be preceded by a sequence header'. Can anybody tell me whats going on and how i sort it out.
Thanx

PS if i posted in the wrong section, sorry!

[DVDAdvisor]

You probably need to re-encode your file and make it DVD Compliant.


An MPEG video stream consists of a succession of GOPs (group of pictures). Each GOP starts with
one complete video frame (called an I-picture or I-frame), which is only moderately compressed. The
following frames (called P-pictures and B-pictures) contain only information that is different from
the I-picture, and are therefore much more highly compressed. Larger GOP sizes help to compress
the video more, because there are fewer I-pictures per second of video.
Because the I-picture is the only complete image in a GOP, it is the only frame where you can insert
a chapter point or pause the video.
The DVD specification requires a sequence header before each GOP (the sequence header contains
information about the MPEG stream, such as aspect ratio, GOP size and bit-rate). DVDit! does not
support MPEG streams without sequence headers. Check your encoder’s settings to ensure that it
creates sequence headers before you encode MPEG files for DVDit!


MPEG-2 video:

36 fields/18 frames (NTSC)
30 fields/15 frames (PAL)

Some encoders generate MPEG-2 streams with variable GOP sizes. DVDit!
supports these streams, providing the GOP size does not exceed the above limits.

Frame rate:
29.97 Hz (NTSC)
25 Hz (PAL)

Aspect ratio:
4:3 or 16:9 anamorphic

Bit-rate:
Constant bit-rate (CBR) or
variable bit-rate (VBR)
2.0 – 8.0/9.4 Mbps

If you use PCM audio in a project, the maximum video bit-rate is 8.0 Mbps.
If you use Dolby Digital, the maximum is 9.4 Mbps.
Filename extension: .m2p, .m2v, .mp2, .mpg, .mpeg, .mpv