There must be an answer??

kevvo wrote on 6/27/2004, 2:33 PM

I'm still quite new to all this, but this is driving me nuts.
Using VV4 (and I've tried VV5 demo, but no different), I take a high quality still camera shot. Insert picture into timeline and use "pan" to zoom slowly in to one part of it over about 5 seconds.
I render to MPEG2 using the standard PAL DV template (best quality), use it as the background to a DVD menu (burned using DVD Architect, PAL 720 x 576) and on playing back (on a regular TV), the picture has a shimmering effect.
Has this something to do with interlace or field order?
I've tried everything. I have "blend fields" selected, Guassian Blur and have tried checking "reduce interlace flicker" in the properties of the still jpeg.
What am I doing wrong???

Thanks in advance and sorry if I have missed something obvious.

P.S. The same effect occurs if I use generated media effects in vegas.

K

Comments

emdiem wrote on 6/27/2004, 7:47 PM

What i have heard is that you shall not blend fields in vegas. vegas 4 and 5 handles interlaced material verry good and i got the advice to keep it interlaced. what you expirience with the movie i can relitate to, i also had this problem with a clip, i made a decition to just remove it and use something else for my dvd production.

sorry that I couldnt be on much more help

travel_addict wrote on 6/27/2004, 7:49 PM

Add a gausian blur to it in the Vegas timeline.
P

TheHappyFriar wrote on 6/27/2004, 8:13 PM

I don't think you can get rid of the jitter/shimmer, but the gausian blur (i've heard 0.02 recomended) would help.

If you want it progressive, make sure your project settings are none for field order & interpolate for deinterlace method (if you're rendering interlaced material with the blend option the lines will "blur" together. Doesn't look good IMHO).

Then render to your DVD progressive template. :) (i do this all the time)

riredale wrote on 6/27/2004, 8:25 PM

I suspect what you're getting is aliasing. It's what happens when you sample a super-sharp image with a much coarser sampler.

You remember the old "wagon wheels turning backwards" effect in the old Westerns? That's an example of temporal aliasing. Spatial aliasing gives all sorts of shimmery, sparkly effects.

The only solution is to back way off on the source resolution, either by greatly reducing the original pixel count, or by introducing blur, as already noted.

By the way: Vegas lets you adjust the amount of blur with keyframes. In that fashion, you can still have excellent sharpness for when you're zoomed in, and just the right amount of blur when you're zoomed out.