I copied the following definitions from this forum some time ago.

"Good" uses bi-linear scaling. (Best compromise between speed and quality. This method will produce good results in most cases).

"Best" uses bi-cubic/Integration scaling. (Best image resizing algorithm available in Vegas. Quality differences will be most noticable when using very large stills or stretching small sources)

If you are using high-resolution stills that are being scaled down to video, use Best and not Good to prevent flicker causing aliasing.

Thanks for the reply. What effect does the setting have in regard to transitions, filters, etc. on DV video? What about stills captured at the recommended 655x480 with motion?

Sorry to ask so many questions but I really would like to know without spending endless hours experimenting.

Thank you again.

Mike

I'm the one that posted that explaination and a more detailed one... many times.

There is very little noticeable difference if any between best and good that can you can detect with the naked eye. However there can be a HUGE difference in the time it takes to render. You could double, triple even take more time than that to render at best verses good. So rarely is it worth the effort. The best advice is try a small sample using each method then view on whatever final medium your project is entended for. Note: If you intend to view as a DVD on your TV or just play off a DV tape from your camera, be aware that TV resolution is ALWAYS worse than the resolution the typical computer monitor can produce. So the small gain you may get in slightly richer shades of colors which is the primpary reason to use best over good... are going to be lost anyway and all that extra time you spend rendering is pointless... for most projects.

I found a BIG difference between good and best when resizing video. I created a video with a textured background, a zoomed back moving video and rolling credits. When rendered at good, the video had many artifacts from being resized that resemble interlacing errors. When rendered at best, the artifacts disappeared. If you are doing normal full screen video, the difference might not be noticeable, but for effects, stay with best.

Dave T2

Thanks BillyBoy, that's just the info I was looking (and hoping) for.

Mike

Dave has a good point too. I haven't seen it myself because I don't do that kind of project.

Dave:
The reason "Best" looked better for your zoom out was because of the "Integration" item listed next to it's description above. I recommend "Good" unless you're scaling down video or using high-res stills, then you must use "Best" or risk artifacts due to aliasing in the scaling.
///d@

Also in the "audio" tab under "project properties" see: "resample quality"...