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Capturing HQ to an external drive

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  • cdrov
    replied
    Has anybody tried the new WD mybook world editin with Gbit ethernet? Theretically, correct me if i am mistaken, 1000Mbit/8 = 125MB/sec. Any experience?

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  • GrassValley_BH
    replied
    Originally posted by Jacques Ménard View Post
    I have three LaCie external drives hooked to one PCI slot interface card on a Dell workstation. I soemtimes get "Drive nor fast enough" when capturing HQ. Is there a better configuration for these drives? When I'm capturing, should i turn a couple of them off?

    The problem onoy occurs during capture.

    Jacques
    What kind of bus are the drives on? FireWire is a repeater technology. USB is hub-ed.

    Does it perform better with fewer drives connected?

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  • Jacques Ménard
    replied
    Firewire 800 and bandwidth

    Originally posted by GrassValley_BH View Post
    Your units are a bit off here...

    It's a different story if you have multiple drives connected to the same bus as they will all have to share bandwidth, but the same is also true for FireWire and SCSI.
    I have three LaCie external drives hooked to one PCI slot interface card on a Dell workstation. I soemtimes get "Drive nor fast enough" when capturing HQ. Is there a better configuration for these drives? When I'm capturing, should i turn a couple of them off?

    The problem onoy occurs during capture.

    Jacques

    Leave a comment:


  • GrassValley_BH
    replied
    Originally posted by kwshaw1 View Post
    What indication do you have that it's as high as 120-160 Mbps?
    Because I have a 203 MB clip that's 13 seconds long... which comes out to being about 123 Mbps, and this clip is pre-alpha support. :)

    That said, it's both resolution, framerate and content-dependent. Since it's a variable bitrate, it'll go up and down.

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  • kwshaw1
    replied
    Originally posted by GrassValley_BH View Post
    Canopus HQ averages 120-160 Mbps, so if you're not doing other things over USB and your USB drive isn't fragmented or using a stupid (underperforming) USB bridge, then it should be OK.
    When I capture to the HQ format (standard quality) my file sizes end up about three times that of HDV, which suggests an average bit rate of 3x25 = 75 Mbps or about 10 MB/sec. What indication do you have that it's as high as 120-160 Mbps?

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  • GrassValley_BH
    replied
    Originally posted by Bluetongue View Post
    Canopus HQ is still compressed and the bit rate to the hard drive is around 20mb/s. an IDE 7200rpm drive can handle 25mb/s so you have a small overhead available, as quoted USB 2 transfer is around 400mb/s so an IDE drive in an enclosure is well within the capability of the USB transfer rate.
    Your units are a bit off here...

    Canopus HQ averages around 120-160 Mbit/sec, which equates to 15-20 MByte/sec.

    USB 2 is 480 Mbit/sec max, which equates to 60 MByte/sec max.

    Your conclusion is still correct though - a single IDE drive won't exceed USB 2 maximum transfer, assuming nearly-full USB 2 bandwidth is available.
    It's a different story if you have multiple drives connected to the same bus as they will all have to share bandwidth, but the same is also true for FireWire and SCSI.

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  • Jerry
    replied
    Originally posted by Mark Von Lanken View Post
    Hi Jerry,

    Blueray or HD-DVD? Just one of many questions I am working on. I learned a lot when I was in Tampa last week. I see the advantages to each format, so I am still holding off on a final delivery format. To be totally honest, I need to do more research.

    For me, the first two steps were to shoot and edit HD. Now that the shooting and editing process is becoming clear, I'm taking a watch and see approach to the final delivery format.

    The SDE for next weekend is actually for another videographer that has hired us to produce a HD SDE.

    What will decide your final delivering format is what ever the client wants!
    With Encore CS3 delivering now, it should open up the Bluray arena. I have been using DVDITPROHD since it's release. It all comes down to the playback device. I will be moving to Encore within the next week. If they are paying for
    an outsourced BluRay or HDDVD, that would be the way to go.

    Leave a comment:


  • Mark Von Lanken
    replied
    Hi Jerry,

    Blueray or HD-DVD? Just one of many questions I am working on. I learned a lot when I was in Tampa last week. I see the advantages to each format, so I am still holding off on a final delivery format. To be totally honest, I need to do more research.

    For me, the first two steps were to shoot and edit HD. Now that the shooting and editing process is becoming clear, I'm taking a watch and see approach to the final delivery format.

    The SDE for next weekend is actually for another videographer that has hired us to produce a HD SDE.

    Leave a comment:


  • Jerry
    replied
    Originally posted by Mark Von Lanken View Post
    Hi Rusty,

    The reason I want to capture and if possible, edit in HD for this SDE is because the completed DVD will be in HD, so I would like the SDE to be in HD as well. The laptop handles HDV pretty well, but if it slows down during the time crunch of the SDE, we can always change the setup to SD for that night, but then change the settings back to HD for the final DVD.



    .


    Are you delivering on Bluray or HDDVD?
    If you are delivering on Bluray, and you are not using Scenarist or having them outsourced, you had better make sure that the client has a compatible Bluray player. Unless, of course, you are just doing the HDDVD format onto a
    standard 4.7gb DVD and they have an HDDVD player.
    I do all of my edits in 1920x1080 HD and with PC3 can output directly from the timeline to SD MPEG 2 resolutions( with SD color space) without the issue of 'jaggies' from PC2. Or, go directly to an HD MPEG for Bluray delivery.

    Leave a comment:


  • STORMDAVE
    replied
    Actually a directly connected ATA133 drive at 7200RPM is about 50-60MB/sec...so that's a pretty good speed. I tested a fast IDE drive via a FireWire 400 interface, and I got around a stable 32MB/sec for read and 30MB/sec for write. If you used FireWire800, you would max out your hard drive speeds...if you used a 10k SATA Raptor drive via eSATA, you'd get really fast speeds.

    Leave a comment:


  • Bluetongue
    replied
    Originally posted by GrassValley_BH View Post
    USB 2.0's maximum theoretical transfer is 480 Mbps, however, this can be significantly reduced by reality and other traffic on the bus (mice, etc).

    That said, Canopus HQ averages 120-160 Mbps, so if you're not doing other things over USB and your USB drive isn't fragmented or using a stupid (underperforming) USB bridge, then it should be OK.
    Canopus HQ is still compressed and the bit rate to the hard drive is around 20mb/s. an IDE 7200rpm drive can handle 25mb/s so you have a small overhead available, as quoted USB 2 transfer is around 400mb/s so an IDE drive in an enclosure is well within the capability of the USB transfer rate.
    I have been using USB 2 drives for a number of years in DV and now HDV from both a Laptop (Toshiba Satelite with a T2500 dual core) and my desk top with no problems.
    I use the laptop in the field and either continue from the USB Drive or copy back to my main computer when home and providing there are no external links from the project like graphics etc, EDIUS finds all the clips even when the drive no changes.
    The USB disks I make up myself using Seagate Barracuda 7200rpm with 16 mb cache in a generic USB 2 case, don't use a USB drive already made up by some manufacturers they do not work, the ones I have tried certainly don't.
    Hope this helps
    Regards Barry

    Leave a comment:


  • STORMDAVE
    replied
    Recently I did some tests with USB2.0 vs FireWire800...FireWire is about 20-30% faster than USB2.0, even though on paper USB2.0 looks good, firewire is less dependent on the CPU and thus has a faster datarate.

    As others have stated, an eSATA RAID0 or even a RAID1 (Mirroring just in case anything goes bad) with 2 fast drives would be more than enough for you. Or Raid 0 if you don't care about security and only about speed.

    Leave a comment:


  • Philip
    replied
    Originally posted by Mark Von Lanken View Post
    Hi Philip,

    I found some PCMCIA to eSATA cards, but then discovered the Dell doesn't have PCMCIA. I found a USB to eSATA, but wondered if it would be limited to USB standards. I didn't know the Dell had an Express card slot. Where did you find the eSATA Express card?
    I got mine at www.cooldrives.com They had a 34mm eSATA Express Card for under $40. They had a 54mm card on the site but none in stock. The 34mm card works fine .... it just doesn't fill up the entire slot but it is pretty secure in there. It works really well. Like I mentioned .... I can get desktop throughput from the eSATA drives.

    I am much more comfortable playing with HQ files on the laptop now and may try my next SDE with HQ files. Problem is I have to retrain my wife to capture with Edius. She does the capturing in SD using Scenalyzer and can have all the scenes named for me before I sit down to edit. She is not an editor and doesn't really want to go there. I wish they made a utililty like Scenalyzer for HD files. That may be the main problem for me doing an HD SDE. Maybe next year when we have a third person along under our new business venture.

    Leave a comment:


  • Mark Von Lanken
    replied
    Originally posted by Rusty View Post
    Hea Mark,

    Because DVD is SD (and reasons from above), I'm kind of surprised you would consider a SDE in HD.

    I capture/edit 16:9 DV w/Edius, output to MS .avi and use a laptop for playback, then copy the same .avi to a Mac formatted harddisk and use directly in DVD Studio Pro for a Same-Day-DVD! (w/rockin' menu too) Clients flip!

    I use external drives for my SDE's without a hitch. I start with an empty drive and copy any required files from my main editor. No fragmentation... yet. Day of, fragmentation is bound to occur. (shrug)

    Thanks Mark for your workshops and inspiration,
    Rusty
    Hi Rusty,

    The reason I want to capture and if possible, edit in HD for this SDE is because the completed DVD will be in HD, so I would like the SDE to be in HD as well. The laptop handles HDV pretty well, but if it slows down during the time crunch of the SDE, we can always change the setup to SD for that night, but then change the settings back to HD for the final DVD.

    We have been using the system drive of our laptop for the last three years without a problem, and that was with a 5400 RPM drive. When we got the new Dell laptop I went with a 7200 RPM drive and have done SD SDEs without a glitch. I was concerned about doing an HD SDE on the system drive.

    Thanks for the kind words. We are glad to help out whenever we can.

    Leave a comment:


  • Mark Von Lanken
    replied
    Originally posted by Philip View Post

    ...I found an eSATA express card for the laptop (same one you have) for under $40 and got the following results from a Hard Drive speed test...


    I have done a few SDEs with the HD cams but just downconverted each one in cam. One customer did get the HD upgrade for her package but I explained the SDE would be in SD just because I wasn't ready to risk the HD edit with the tight turn arounds. I know it would probably work fine but just didn't want to take the chance since the laptop was still very new and I had not put it through the paces enough to feel comfortable. Now all you and I need is a HD projector and we can do HD SDEs....how cool is that?
    Hi Philip,

    I found some PCMCIA to eSATA cards, but then discovered the Dell doesn't have PCMCIA. I found a USB to eSATA, but wondered if it would be limited to USB standards. I didn't know the Dell had an Express card slot. Where did you find the eSATA Express card?

    All of the SDE's have been downconverted. Then on that one minute trailer we did is SD, I recaptured it in HD. It was pretty easy since it was only a one minute clip. The difference between SD an HD is eye opening.

    When we were down in Tampa I left a copy of the HD trailer with David. He is going to make a Blue Ray copy for me. When I was down there I got to see how the demo SD right next to HD in their sales presenations. It's amazing to see the difference. They are using 2 $750 projectors that have RGB inputs for the side by side comparison, so HD SDEs are not that far away.

    Leave a comment:

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