CompuServe Messages

John: >Rendering is making a computer graphic composite with two or more sources and outputting that to video while video overlay can accomplish this realtime without making a composite first?< Not quite–"rendering" is simply any graphics activity that the computer can't do in real time (like generating a series of complicated animation frames, or generating a complicated transition between two digitized scenes). One of the reasons I was shocked about "rendering keyed text over video" is because it's pretty *easy* to do–it's not like the text is going anywhere (generally), or that text itself is particularly memory-intensive (I mean, it's just letters in a particular typeface…). It's not like a series of drawings or digitized frames, which can take up to about a megabyte *per frame* for VHS-level resolution… >Is overlay a relatively new capability?< Hardly–it's been available on film since the days of silent movies, and on video from the days of two-camera studio shoots. Again, that's why I was shocked–I thought this particular problem w/licked w/NLE a while ago… Best, Tim