CompuServe Messages

#Anim7 or Anim8

    09-Aug-93 15:58:46
Sb: #34015-#Anim7 or Anim8
Fm: Erik Flom 71204,407
To: Eugene Kushnir 76330,2650
I'm getting rates of 20-30 fps, but that's in LoResOverscanNoLace mode (376×240), and the deltas between frames are very low. I'd say your problem was the resolution you used. HiRes interlace is really overkill for HAM8 modes. You'll get much better animation rates if you shrink the 640×400 anim down to 320×200 (or400) – just make sure the images are anti-aliased when you scale them (this is an option in DPaint, I believe.) When you design your anims, try to make sure that the motion between frames is kept low. Avoid doing things like scrolling or panning the background, as this will wreak havoc with the delta compression scheme, and result in huge anims. It is best to have a few isolated elements moving over a stationary bkgd. While not very exciting, it _will_ playback smoothly. I have found that lores nonlaced anims look quite good, and are more than acceptable for most purposes. Since VHS has a maximum resolution of around 240×480 lines, any benefit of higher resolutions will be lost, and most people won't notice the fact that its non-interlaced. (They're more likely to notice a jerky playback speed. Which is what you'd get with a higher resolution animation.) Another benefit of LoRes NonLace anims is that they are generally much smaller, meaning you can get more frames in the same amount of space, and you _might_ even be able to use the new feature of Viewtek which allows you to play back anims direct from hard disk. (As an example, I created a 1000 frame HAM8 anim, and it only took 15MB of storage. While 15MB may seem big, 1000 frames is alot of animation! :^) Finally, make sure you're using Viewtek. Version 1.05 has fixed any problems with unlocked palettes you may have noticed. In closing, I'd like to ask for some feedback. Try these tips out, and tell me if you notice much of an improvemnt. I am finishing up an article on this very subject, and would like to make sure my tips actually _do_ work! :^) Keep On Toastin' Erik Flom