I am editing with Magix Movie Edit Pro 11, I have xp pro, 3G Intel P4,
2Gb RAM.  I export my 3 hour video file to an .mpg at 640X480 and at
about 4300 bit rate and I get about a 6G file.  I watch it in Media
Player and it looks good. I then import it into Ulead Workshop2 to
author it.
I add 60 chapters and several pages of menus.  Ulead makes the dvd and
it overall looks good, EXCEPT during about 20 minutes of the footage,
it pulses, kind of a slow flashing and?it does this noticeably.  In
Movie Edit Pro I have tried changing the bit rate incrementally, way
down to 2600, done top down interlace, bottom down and progressive
encoding,  Changed to 702X480.  I keep getting the pulsing from 00:00
to about 12:00 and a section from 21:00 to 26:00, all most exactly
every time.  It is not triggered by any chapter breaks, does not stop
at a change in footage.  I have rendered my brains out for these last
two weeks trying to get rid of it.  I had another video that is two
hours and a faint pulsing is at the first 5 minutes, but not enough to
cause much distraction.  Don?t know if it is MMEP11 or Ulead, but  if
I change the file, I will probably lose 3 weeks of editing in sync
with the menus. What settings will possibly fix this? Probably cant do
a dual layer disc.
Thanks all, duane

I am not exactly sure if information below is known, but should be on
your checklist.

My suggestions are to verify the settings.
The fastest way and to reduce time encoding is to capture at the
nearest resolution to output.

NTSC - USA
<b>Video</b>
720x480px - 29.97fps - 16/24bit color

<b>Data Rate</b>
4000kbps (Average) Greatly affected by slow drives.

<b>Audio</b>
44 khz or 48 khz (Typical) - 224 Kbps - 16 bit Stereo
Though when the Video in the codec I found cleanest is DIVX (MPEG4)
which has better compression than MPEG2, but will be downcompressd to
MPEG2 when burned as DVD.

<b>Other things to watch for</b>
Hard Drive Speed - You should test the drive speed, the data rate of
the video is affected by how fast it can save/compress incoming
streams. The Hard Drive should have a data rate of least 3600kbps (not
the RPM rating), that is a relatively safe thing on most newer major
mfg drive or PC's.

If you are using an older 8GB drive you had laying around, or trying
to burn directly to DVD from carture, it generally will fail.

<b>Hard Drive Fragmentation</b> - The drive should be defragged before
starting capture.

<b>DVD Time Limitations</b>
At Good Quality, you should be able to get only 100 min of DVD video
per 4.7GB DVD.

When you cut back the compression ratio in lieu of time, the quality
is severly degraded, and not worth it with standard DVD burner.

<b>Hum or buzz in video could be caused by:</b> In order of likelihood
Bad (MPEG) Codec in Capture Software.
Wrong Audio Capture Rate
Audio Source (mic) open during capture/and laying on desk/hard surface
CD/DVD wobble
Power Supply not on surge or filter.
Motherboard not grounded properly.
Trial Codec pest code (interjecting buzz on expired trial)

<hr> I use uLead Video products and the codecs have not been a
problem, and can vouch for those video products. But as far as MAGIX I
am not familiar with the brand or company.