>Date: Mon, 9 Dec 2002 17:19:25 -0500 >From: "Jan E. Schotsman" <[EMAIL PROTECTED]>
>-------------------- Begin Original Message -------------------- > >Message text written by Jeff Walther > >"Thank you for the detailed answer, David. I take it that you did = > >not have a JackHammer in your Q840 to run your hard drives?" > >-------------------- End Original Message -------------------- > >Jeff, > >What kind of capture performance do you need? Hi Jan, Shoot. I don't know. That's my problem here. Ignorance. I know so little about video capture. What I really need to do is set things up and try this with the equipment I have on hand, see how it works and go from there. But with one thing and another, I haven't done it. Still, that doesn't stop me from asking questions whenever the topic comes up somewhere to try and fill in the holes in my knowledge. What I've got is a bunch of video tapes in the 3/4" (? or is that 1", the stuff from the 70's) format and a player out in the garage which I hope still works. It worked about five years ago when we dubbed these to VHS. My partner was in TV news and these are her stories and demo tapes. We want to get them into a digital format so that they won't disintegrate with time. We want the best quality we can affordably manage, but obviously, quality beyond the quality of the original tapes is probably wasted. I understand there's some trade off between compression and quality. I'm also rather ignorant of digital video file formats, though I know a bit more than I did a couple of months ago. I think it would be best for long term maintainability to get them into MPEG 1 or 2 format. However, from what I've read I have the impression that most of the capture cards capture to M-JPEG format. I think that once one has it in M-JPEG one can use QuickTime to export it to MPEG? I'm willing to learn that everything in the previous paragraph is wrong. I have a Radius Video Vision Studio, PM8100/110, JackHammer SCSI card and assorted hard drives. The 9 GB hard drives may not deliver much past 10 MB/s, but I also have some 18 GB drives I can attach which are capable of about 25 - 35 MB/s, which would outrun the JackHammer card. From reading the Radius VVS forum on the World Wide User Group web site, folks do apparently manage full screen capture with the VVS at 30 fps. It sounds like they may need to fiddle with some configuration issues and one fellow recommended recording the sound track separately from the video with time ticks and then reintegrating them after capture. I'm not too clear on how one would do that, but I think I understand the theory. Oh, and the VVS came with Premier 4.1. >With a card like the Aurora Fuse you can capture in M-JPEG format at The Fuse is still going for close to $300 on Ebay. It's just not in the budget any time soon. I do have an 8500 board here and a case I could install it in. I'd have to solder the Hammerhead chip back to the 8500 board, which is a minor pain... But I had always heard in the past that the 7x00 and 8x00 machines could not do full frame full speed capture. I'm surprised that it's working for David, but it sounds like he may have upgrades that folks hadn't tried when the verdict about the 7/8x00 machines' video capture was declared. That's why I was so interested in his experience. If the built-in in the 8500 or 8600 would actually give nice quality, then that's another avenue I'll explore. >up to 9MB/sec IIRC. >Any U-SCSI disk or better is fast enough to record that. Actually, I have some older USCSI drives which manage to top out at 8 MB/s performance in real life. :-) But you're correct that any *reasonably* modern drive will deliver far in excess of 9 MB/s performance. >Totally uncompressed at full size and frame rate is posssible too with >early PCI AV PowerMacs, using 2 UW SCSI disks and the JES Movie RAID >software. You end up with very large files this way though. I am not familar with that software. Is it specifically for video capture applications? How expensive is it? I have SoftRAID and HDTK 3.x, both of which can set up RAIDs. > >BTW, it seems David has found another way. I would like to know a little >more about his system too. So fess up David. You have an audience of at least two. :-) Jeff Walther -- PCI-PowerMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- Sonnet & PowerLogix Upgrades - start at $169 | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> PCI-PowerMacs list info: <http://lowendmac.com/lists/pci-powermacs.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive:<http://www.mail-archive.com/pci-powermacs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
