Article View: comp.multimedia
Article #1377Re: Video (from hard disk) to screen
From: Neal Wickham
Date: Sat, 19 Dec 1992 06:11
Date: Sat, 19 Dec 1992 06:11
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In article <1gr5taINNrr4@fido.asd.sgi.com> grege@chopin.asd.sgi.com (Greg Estes) writes:
>|> >I'm looking for a way to pack digitized video frames to hard disk and
>|> >further to show those packed files on screen (several pictures in second).
>|> >an analyse, too).
>|>
>|> Buy a SuperMac 'Digital Film' board for a Macintosh (and get a fast CPU and
>
>(etc., etc.)
>
>As an aside, an SGI Crimson (not a 310) VGX can run ~30FPS full resolution
>uncompressed video from memory.
The new Amiga 4000 will animate 30fps at 640 X 400 (plus overscan I believe)
in its HAM8 mode which is of a 24-bit palette. The EdidMaster JPEG board
from DMI animates in 720 X 486 although the output is composit NTSC. It
probably also outputs through DMI's 24-bit Vivid board... the literature is
not that specific but I assume "connectivity" on "32-bit pixel bus" means it
will output through the board which is as high as 2048 X 2048 res.
>So, if you can store the images in memory
>instead of a disk, upgrading from a 310GTX to a Crimson/VGX may be a better
>use of your money than starting all over on the Mac and going the JPEG path.
For the $42,900 you'd spend on an SGI 4D Crimson Elan, you could buy a
couple or three Amiga systems with Toasters, Vivid boards (100,000 poly/s)
and Digital EditMasters.
from DMI flyer:
HOW DOES THE DIGITAL EDITMASTER COMPARE WITH OTHER SYSTEMS (Avid, Emc2,
Digital Film) ON THE MARKET? -- First, the EditMaster takes advantage
of the up to 33 MB per second tranfer rate of the Amiga bus, not avail-
able on other desktop platforms. This allows video to be digitized into
the system using a very low compression ratio. This is a distict advantage
over digital editing systems operating on other computer platforms.
Second, the EditMaster uses the full motion JPEG chipset from LSI Logic.
The LSI chipset operates internally at a 4:2:2 digital resolution of
720 X 486. Other products, which use the C-Cube JPEG chips, generally
digitize the signal at much lower pixel resolution. Some are as low as
320 X 200. The low compression ratio and full screen resolution allow
Editmaster to output edited video at Betacam quality.
NCW
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Newsgroups: comp.multimedia Path: arc1-ca.pugleaf.net!sparky!uunet!mnemosyne.cs.du.edu!nyx!nwickham From: nwickham@nyx.cs.du.edu (Neal Wickham) Subject: Re: Video (from hard disk) to screen Message-ID: <1992Dec19.061119.29823@mnemosyne.cs.du.edu> X-Disclaimer: Nyx is a public access Unix system run by the University of Denver for the Denver community. The University has neither control over nor responsibility for the opinions of users. Sender: usenet@mnemosyne.cs.du.edu (netnews admin account) Reply-To: nwickham@nyx.UUCP (Neal Wickham) Organization: Nyx, Public Access Unix at U. of Denver Math/CS dept. References: <SUHONEN.92Dec7104750@jalka.jyu.fi> <1338@taniwha.UUCP> <1gr5taINNrr4@fido.asd.sgi.com> Distribution: comp Date: Sat, 19 Dec 92 06:11:19 GMT Lines: 53