Basic Rendering question

flicktease wrote on 4/23/2003, 11:04 PM

Is the loss of quality & the time taken to process rendering of video accumulative? In other words if you have a scene that is going to have more several things applied to it does it make any differance in process time & quality if all things are done together or seperately?

Hypothetically speaking if you had to sharpen, brighten & alter the saturation of a scene are the results the same in terms of both time & quality if you do this as one process or 3 seperate processes?

Comments

SonyDennis wrote on 4/24/2003, 11:58 PM

If you can apply all the FX together, do, rather than rendering each out and then using that rendering for the next FX. Each render (unless it's to an uncompressed 4:4:4 format) loses some data, which is cumlative. That said, the Sonic Foundry DV codec hold up pretty well under multiple generations, but there is still loss (it's the nature of compression).
///d@

BillyBoy wrote on 4/25/2003, 12:13 PM

I ALWAYS apply whatever filters I'm going to use in one shot... then render. It is far faster than rendering over and over and like Dennis said each time you render there is some data loss. Hardly noticerable with the DV codec though, its mainly a time saving thing. Having multiple FX filters applied then rendering once is much faster than rendering over and over one filter at a time.

You MAY see differences is how the project comes out based on the ORDER of the plug-in chain. This is covered well in the manual. Its mostly trial and error to see which order gives the best results. For example I use the color curves and color corrector FX in almost every project. I start with dropping color curves on the timeline, so it is first in the chain, then color corrector. Depending on how much effect you apply there can be differences, so if you've broken your project into a bunch of events and apply these filters to each, you would be wise to keep the order the same, otherwise subtle changes may creep in which would cause you to either over or under correct one event compared to the others if the plug-in order is different on some.