🚀 go-pugleaf

Supermac Digital Film is a nubus board or two, $6000?, that can do
640x480 quicktime at 30 frames/sec. with stereo sound.  This
one was demoed at MacWorld.  The quality looked VHS-ish to me.
They claimed the quality depends on how much disk bandwidth
you want to purchase; this *claim* makes sense technically.

I have not seen the other products:

RasterOps Moviepak is a daughterboard for their *TV boards, ?$2000.
A brief MacWeek article said it can do full-screen quicktime at 
"up to 30 frames/sec". MacWeek quoted beta testers who said the 
quality was excellent; the "up to" part sounds troubling though.  
Perhaps they mean you need a quadra & a fast disk.

I believe Radius VideoVision is *not* a quicktime accelerator
at the present time-- it is like the 24STV, Nuvista, and other
boards:  It can display video in a window and capture into memory
(or disk at a slow speed), but it does not do JPEG compression.
It is distinguished from the 24STV in having some filtering 
when scaled video is displayed (??) (better quality).
> There are hints that Radius may make a JPEG compressor as a 
daughterboard.

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Other full frame/full speed products are Avid's, > $10K, 
and something from Data Translation, which cost about $10K
but as of last spring did not seem to be quicktime compatible.