Final rendering quality

Bart wrote on 6/30/2002, 9:14 AM

When I choose a template in the Project Properties window and I choose for DV PAL, the preset for "Full resolution rendering quality" is standard set to "good".
Does this mean that when you render your final project (to print to tape or to create an AVI of your project) that the DV quality of your result will be less good then when you manually set the rendering quality to "best" ?
Or does this rendering quality only have effect on previewing your project ?
I don't see a reason to use lower quality when using DV material ... or you should want to export to the web or something.

Comments

BillyBoy wrote on 6/30/2002, 12:28 PM

This topic comes up a lot.

I think it was Dennis of SoFo that gave the specifics awhile back. Basically the difference between "good" and "best" deals with Bilinear verses Bicubic Interpolation. This is used to determine how to adjust pixel color which is necessary for exmaple when you apply some filters and also resize the frame size of the video.

With "good" Bilinear is selected it means any pixel changed is changed based on the color of its neighbors to the top, bottom, left and right. A fairly simple computation. With "best" Bicubic Interpolation is used which in addition to looking at the four directions of Bilinear it also looks at pixels on the diagonal arriving at a weighted average. Now you know one reason why rendering takes so long since this is a frame by frame process. I'm by no means any expert on this. The preceived differences under most cases isn't striking, maybe not even that noticeable. So you may want to try a small test section under each setting to see if it is worth the extra rendering time.

I'm just recalling the fundamentals from image enhancement say with Photoshop. If my assumptions are incorrect, someone please correct me. <wink>

SonyDennis wrote on 6/30/2002, 3:21 PM

BillyBoy:

You're right on, but I think it was SonicEPM who posted the original info. Good vs. Best is only going to matter if you're scaling images. For cuts, transitions, and filters, there's usually no difference.

///d@

Bart wrote on 7/1/2002, 5:04 AM

Thanks guys !
I'll do a "test project" to see if it's worth changing from "good" to "best" and spending more time on rendering.
Regards !

satchriani wrote on 2/27/2003, 2:06 PM

Will changing from good to best increase the quality of a slow motion clip as well?

Sorry for bringing an old topic to the top

BillyBoy wrote on 2/28/2003, 9:49 PM

I'm going to answer like a politican and dance all around your question without answering it directly. <wink>

It depends. It really does. If you only slow down, I doubt going to best will make any noticeable difference. If you pan and more so if you zoom also, on top of using slow motion then I'd answer somewhere between maybe and proabably. If you are using higher resolution images that you pan/zoom then a qualified yes. Again its going to vary from project to project. There are just too many ands, ifs, buts and maybe to pin it down to justify if the much longer rendering time is worth it. Everything else being equal if you use filters correctly and have decent source files to work with I don't normally. How's that for dancing all around?