what causes Horizontal corrugated lines effects on some footage ?

[beammeup]

Hi,

I notices the occasional horizontal corrugated lines on my DVDs recently. This doesn't happen all the time, normally on some fast moving scenes. I create 1000's of DVDs per year for customers, but only notice this effect on some of the DVDs

I am converting AVI to MPG2 ( I live in a PAL Country )

The AVI file is laid out in Vegas Video 4 and is frame-served by Debugmode Frameserver to Canopus Procoder to make the final mpg2 file.

As far as I'm aware, I have the Field order correct.

I do however use the crop feature in Procoder to trim the 4 sides of the screen, Normally 2 or 4 pixels each side. The reason for cropping is that these AVI files originate from capture 8mm & 16mm Projector film. The edges sometimes need trimming to clean up tiny bits of fluff and other bits etc.

I author the DVD with an older version of TMPGenc DVD author.

Has anybody got any knowledge in regards to this subject please ?

cheers
Scott

[jagabo]

Improper resizing of interlaced material. Mask the edges instead of cropping and resizing.

[beammeup]

Thanks for your quick reply.

Are you saying that the crop tool in Procoder is causing this effect ?

[jagabo]

Not the cropping, the resizing after cropping. An example:

https://forum.videohelp.com/threads/313209-Premiere-converter-vs-freeware?p=1936125&vie...=1#post1936125

[beammeup]

OK thanks, I'll take the tick off the Scale video button in the crop section in future and see how things turn out.

cheers