Better to Render twice or Not????

Chrissy wrote on 6/1/2004, 1:23 PM

A friend of mine told me that it makes a difference if I render my projects twice for better output quality. But does that really make a difference or not?
My thought is that it shouldn't make a difference. But does it?
Chrissy

Comments

rcrawfor42 wrote on 6/1/2004, 1:30 PM

Why would it?

Perhaps your friend is thinking of two-pass MPEG encoders?

BillyBoy wrote on 6/1/2004, 1:38 PM

I also think that's what your friend means. A 2 pass encoding is the encoder running through the file to be rendered twice. You as the end user select the option, you don't run it through twice. That's generally bad for any MPEG file because you're re-compressing a already compressed file.

Grazie wrote on 6/1/2004, 10:47 PM

Not quite the same "issue" BUT! When I've had a tiny blip, a piece of a complex manipulation not rendering or crashing Vegas - colour correction, some 3d, some graphics etc etc etc all in this one section - then I pre-render. This isn't quite the same as your request about "quality" but I did not want to not tip you the wink on this. Pre-rendering CAN cure a lot of ills.

Grazie

Bill Ravens wrote on 6/2/2004, 6:25 AM

every time you render ANYTHING but uncompressed, you take a small hit on quality. Some DV codecs are notorious, others, like the vegas DV codec, are rather benign. It's good practice and policy to keep your number of renders to a minimum to avoid quality loss.

JJKizak wrote on 6/2/2004, 7:01 AM

Anybody done any experimental 2 pass renders to see if there was
any difference?

JJK