I am using 2 80 GByte USB-drives and 2 160 GByte USB-drives on a P4, 2.8GHz laptop with 1 Gig RAM and output the video in parallel to the firewire with a firewire/Y-C converter to view the video in high quality on a large JVC monitor. So far I have never experienced a bottleneck when acquiring from firewire (via Scenalyzer live) or playing back the video in the timeline or transferring back to DV tape after everything is rendered. (I am using Premiere Pro 1.5)
One drive holds the raw clips (all DV), one is used as scratch disc, the third is used to hold conformed audio and the fourth is used to store the finished results in DV and MPEG2 for DVD authoring. I can't think of a more cost efficient setup. The only problem I have is jerky preview of effects in HQ-display mode before rendering, but that's another Premiere Pro can of worms... --- In [email protected], "Jeff Schell" <[EMAIL PROTECTED]> wrote: > > This is not a 100% accurate statement. DV-AVIs and DV-QTs are always > compressed 5:1. So it is not accurate to say "if the file DV-AVI is in a > compressed format..." because it is always in a compressed format. > > DV video requires a paltry 3.6mb/sec throughput per stream. It is also > incorrect to state that "US-2 and Firewire drives are far too slow to keep > up with the CPU." Rather, the speed of compressing/decompressing and > encoding/decoding is largely determined by your processor, as where > playback--or even capturing--the harddrive needs to sustain less than > 10mb/sec. > > Furthermore, USB-2 and IEEE-1394 external drives are capable of sustained > transfer rates between 30 and 40mb/sec. What's most important when > purchasing an external drive is the rpm (7,200 at least) and buffer cache > (this is like ram for your computer, and your hard drive will thank you for > it). > > > ----- Original Message ----- > From: "Knuckle Martin" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Monday, November 14, 2005 4:23 PM > Subject: Re: [AP] Elementary questions > > > If the DV-AVI is in a compressed format, you (may) get buy with > using a remote drive, but it's still pretty much an industry no-no for > any use. > > -------------------------------------------------------------------- > > The transfer rate of firewire and USB-2 are still too slow to supply > large uncompressed avi files. > You're better off using an internal SATA EIDE (dedicated D) drive > to host your video files than an external drive. > > If your project is something small (for the web, for example) > > Small project example: > 320 x 240, 15fps, compressed avi. > and each project file is around 2-to-20 mb, then > this type of project will feed pretty easily, since the mb-per-sec > is pretty low, and each of the project files are relatively small.. > > Large project example: > If your DV-AVI is:720 x 480, 29.97fps, 32bit color, > uncompressed avi.and each project file is multiple gigabytes in size, > then a remote drive won't transfer data at a high enough data rate > to avoid problems. Using a remote drive with a project like this > to host the source files, will frequently experience jerkiness or > frame-skip in the finished product, or it may lock-up your system > altogether. > > ------------------------------------------------------------------ > > Pro authoring companies never use a setup like this > (remote USB or firewire drives). > > Pro companies spend a lot of money on SCSI Video RAID systems > to host and process their source files. If they could get by with a low > cost solution like a remote drive setup, they would. > > Note: > I don't expect the average user to spend 5 or 10 grand for a Video > RAID server, but there are some (much less expensive) solutions > for the occasional user. > > Example: > dual channel Ultra-320 controller = (+/-) $600.00 to 800.00 > 37 Gig SCSI-3 (C-Drive) = (+/-) $300.00 > 300 Gig SCSI-3 (D-Video Drive) = (+/-) $700.00 to 900.00 > > I used a system like this for years, before I dropped the dough for > my current video RAID system. It worked great for all but the > largest projects. > > Yes, this will add around $2,000.00 to the cost of building a video > editing computer, but, if you want to do system-intensive things, > you need a system that can handle the job. > > Video editing machines need to be as fast and efficient as possible. > Even "gaming" machines generally aren't up to the task of editing large > video files. > > Many of the problems that I see posted here are directly related to > using systems that aren't configured to do the job. > > > Just my take on it. > > > Knuck > > ----- Original Message ----- > From: "Lee Schneider" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Monday, November 14, 2005 12:28 > Subject: Re: [AP] Elementary questions > > > > 4. Never use a remote/external drive (USB or firewire) to hold your video > > files > > when editing. The data transfer rate of USB-2 and Firewire drives are far > > too > > slow to keep up with the CPU, when editing uncompressed video. > > These drives (may) work adequately when accessing smaller video files, but > > they > > can't access large video files fast enough. > > > > > > When you say uncompressed, are you talking about DV AVI files, or > > something more intensive? I believe many people are > > using external firewire drives to store their AVI files that have been > > captured from DV. > > > > > > > > Lee > > > > > Schneider Equine Video > > Fort Worth, TX > > (541)543-8368 > > > > > > > Yahoo! Groups Links > ------------------------ Yahoo! Groups Sponsor --------------------~--> Get fast access to your favorite Yahoo! Groups. Make Yahoo! your home page http://us.click.yahoo.com/dpRU5A/wUILAA/yQLSAA/ADr1lB/TM --------------------------------------------------------------------~-> Yahoo! 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