Unwanted 'Filmic' Effect on Computer Edited Video

[John W]

Hello all,

I wondered if someone could help me. I have copied some video off my MiniDV
camera onto my computer via an IEE1394 cable using Windows Movie Maker set
to 25fps PAL. I edited the video and added captions etc. then saved the
edited video as an AVI 25fps PAL. When I play this AVI video using GOM
Player it looks great.

Things start to go wrong though when I try to create a DVD from this AVI
file. I have tried both DVD Styler and DVD Flick computer programs to
create a DVD but I find that when I play the DVD back either on my computer
or in a DVD player some scenes have a severe juddery 'filmic' type effect.
If I pause the video I see two frames superimposed onto one another rather
than a single, steady frame. I see the same effect if I play the DVD files
directly in GOM.

When I play the AVI file created by WMM the frames can be frozen perfectly.
The DVD result I think is unsatisfactory and can be painful to watch in the
most extreme cases and I wondered if anyone has the answer please.


Regards,


John R Wells (UK)

[broadband for as little as £5.99/month www.wells10000.plus.com]

[Dave H]

Your definiation of Filmic effect is wrong.

Films don't have fields they have frames. TV pictures have 2 fields per
frame, if you Film Fx a tv picture you throw away one of the fields,
normally the 2nd field and dupicate the first field creating 2 identical
fields which in all sense becomes a frame.

If your still with me so far and havent fallen asleep :)

The problem you've highlighted is a common one and its because you're
playing DV material possibly on a non DV timeline and I'll bet its as jerky
as hell when there are pans and movement of the camera & sunjects. One
possible cure is to de-interlace the file, this is a simple 'Filmic' process
which will get rid of the jitter - hopefully - the down side is it will make
your picture look softer.

DV signals are a complete pain in the bum as they go against the norm and
start their signal on field 2, where the norm is to start on field 1. In the
TV world you can edit DV material providing your project and timeline is set
to DV & you capture everthing as DV - including all the other TV acquistion
formats. The other problem as well is watching it on a TFT TV and a CRT TV,
TFT don't have fields in the sense that CRT TVs do, so its always best - if
possible of course - to watch on a CRT TV and you'll see things like wrong
field dominance and other faults you can't see on a TFT.

The other problem I see a lot, is when there is a double field dominance
change and that's a bugger to find where it went wrong :)

I don't know your method or the programmes used as I'm a Mac man and use
Final Cut Studio to edit my movies and DVDs, but I'm sure someone else could
guide you in the right direction :)

Regards
Dave

[Gripper]

Post by John W
Hello all,
I wondered if someone could help me. I have copied some video off my
MiniDV camera onto my computer via an IEE1394 cable using Windows Movie
Maker set to 25fps PAL. I edited the video and added captions etc. then
saved the edited video as an AVI 25fps PAL. When I play this AVI video
using GOM Player it looks great.
Things start to go wrong though when I try to create a DVD from this AVI
file.

The way to avoid this (field order/deinterlacing) problem is to either

save the edited video .avi in the same format as the source- 25 FPS PAL DV
or
export the edited video back to the camera.

Then use a DVD authoring programme. I use Ulead DVD Movie Factory which will
allow you to make your DVD from either the saved .avi file, or go straight
to DVD from the camcorder in real time.

hth

Neil

[John W]

Hi

Thank you for your replies. I will have another play in a few days time.

John
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