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- Newsgroups: comp.compression.research
- Path: sparky!uunet!wupost!crcnis1.unl.edu!moe.ksu.ksu.edu!usenet-feed.cc.umr.edu!quandt
- From: quandt@cs.umr.edu (Brian Quandt)
- Subject: video capture to drive
- Date: Tue, 12 Jan 1993 01:36:38 GMT
- Nntp-Posting-Host: mcs213c.cs.umr.edu
- Organization: University of Missouri - Rolla, Rolla, MO
- Sender: cnews@umr.edu (UMR Usenet News Post)
- Message-ID: <1993Jan12.013638.11048@umr.edu>
- Lines: 52
-
- I'm working on MPEG compression here at University of Missouri and
- we are about to set up the lab so that we can actually capture video
- to harddisk to be compressed using MPEG. My question is essentially
- how to do this.
-
-
- Here is what I have found out so far (info for the group for once instead
- of just always asking questions)
-
- You can capture video at CCIR-601 resolution to the Abekas A-65/66. This
- device will connect directly to a D-1 type deck and then capture 20-50
- seconds of video in real time to a highspeed harddisk. The A-65/66 comes
- equipped with both an (thick... groan) ethernet and scsi-ii connector.
- Built into the A-65/66 is a minature unix like kernel with tcp-ip
- support. So essentially you can hook this beastie up to your network
- and rcp/ftp to from it. The SCSI connector can not be connected directly
- into your Sun and configured as a hard-drive but you can hang an
- exabyte drive off it and then archive stuff to it later. So the basic
- process to use this thing is
- 1) dump from D1 to abekas
- 2) transfer via ethernet to host computer
- 3) do you stuff (encode it or whatever)
- 4) send it back to the abekas
- 5) off load from abekas to the exabyte hanging on the scsi
- 6) go to 1 (get another 20-50 secs of video from the d-1)
-
- Cost:
- a-66 $25k
- ethernet support $5k
- if you want to use a non-d1 deck (e.g., $100k we don't have one)
- A/D conversion $5k
- D/A conversino $5k (yes you have to buy seperate A/D, D/A)
-
- So this looks like a feasbile solution, but... well it just seems to
- me there must be a better way.
-
- What about using a disk array? And some device that would allow me
- to hook up a deck (component video or whatever) directly to the
- disk array. Just running through the figures in my head to get the
- necessary bandwidth on the disk array at about $1500 (1gig)per drive
- I get competitive pricing and more importantly I don't get stuck with
- a device (the abekas) that will probably be more outdated then a studebaker
- in about a year (at least as a device for compression research).
-
- Okay now my question. I really don't know a thing about disk arrays.
- Who sells equipment to set one up? Can I get about 27-30Megabyte/sec
- throughput? What about the missing device to go from an external
- deck (conponent video or whatever) into this disk array?
-
- thanks
-
-
-