>From: [email protected] >Reply-To: [email protected] >To: [email protected] >Subject: [AP] Digest Number 1998 >Date: 19 Nov 2005 21:27:14 -0000 > > >There are 2 messages in this issue. > >Topics in this digest: > > 1. Re: Elementary questions > From: "peartree_46" <[EMAIL PROTECTED]> > 2. Audio questions > From: Cameron Sang <[EMAIL PROTECTED]> > > >________________________________________________________________________ >________________________________________________________________________ > >Message: 1 > Date: Thu, 17 Nov 2005 13:51:27 -0000 > From: "peartree_46" <[EMAIL PROTECTED]> >Subject: Re: Elementary questions > >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 > > > > > > > > > >________________________________________________________________________ >________________________________________________________________________ > >Message: 2 > Date: Thu, 17 Nov 2005 17:45:59 -0500 > From: Cameron Sang <[EMAIL PROTECTED]> >Subject: Audio questions > >I've always hated the audio part of film-making, as it's the hardest part >to get right. I have a couple of projects in the wings, and have two ausio >problems I'll need to address before starting. > >The first project is converting some teaching videos from VHS to digital. >The basic process is not a problem, but the client wants the music to be >filtered out, or at least, have it less noticible. > >The second project involves over dubbing dialogue, but keeping the original >abient sound intact. > >What advice can forum members give me? > >Thanks > >Cameron > > > >[Non-text portions of this message have been removed] > > > >________________________________________________________________________ >________________________________________________________________________ > > > >------------------------------------------------------------------------ >Yahoo! Groups Links > > > > >------------------------------------------------------------------------ > > > ------------------------ Yahoo! Groups Sponsor --------------------~--> Get fast access to your favorite Yahoo! Groups. 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