Mark Beazley
Forum Replies Created
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I would think it is more of a disk limitation…
-mark
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Nobody to chime in??? I did a RAID 5 on the array, but I still have the HD questions.
-mark
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Ok some more questions…I finally got wired up last night even though my MacPro is in transit… started playing around using my MacBook Pro.
What exactly are the “de-facto” standard frame rates for the various flavors of HD? There are so many options, but I would like to at least make sequence defaults for the most common ones. I also noticed that that HD to SD down convert only works on certain frame rates that equal or double 29.97; which makes sense but seems odd to me; I would assume that the AJA would do any pulldown frame rate conversion as well.
I also have a RAID question; currently I have been using G-RAIDs for all my SD stuff on the G5 IoLA setup and have not lost a thing over the course of 4 years. Seeing how the G-RAIDs are RAID 0; should I just use RAID 0 on the G-SPEED es for the new system or go for the RAID 5? I only ordered a 2TB sized model, which would still give fairly decent storage (at least for anything I do) @ ProRes data rates even if it dropped to 1.5TB.
One more thing; since HD is new to me; do I really need a GEN10? I did not know anything about tri-level sync, so I did not really have this budgeted into the system…. grrr… I don’t imagine I will be doing a ton of HD work and if I do, I will probably get to choose the frame size and frame rate myself.
-mark
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I will not be having a home theater style receiver near this. I basically have a 16ch mixer + some Tannoy studio monitors.
-mark
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Well it is the same thing in OSX; AfterEffects internally can only use 3GB. Under the multiprocessing tab you can enable to render multiple frames which will use 400MB per instance and then each instance can use all available RAM for previews.
I noticed a huge increase in RAM preview length when I went from 4GB to 6GB.
-mark
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Yeah I understand that.
So the consensus is that the IoHD is going to allow G5 machines to capture ProRes 422?
If the answer is yes, then I am not going to worry much, since the IoHD makes a whole lot more sense than a Kona card. At least the IoHD will continue to work on future machines until they faze FW800 out.
Sorry if I sound a bit jaded, as I imagine there are tons of G5 owners salivating over the release of AJA’s new product.
-mark
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Even with the IoLA, you need (or should) use an PCI-X Firewire card for your storage, as the IoLA takes over the internal FW bus as well. It really isn’t a problem until you start doing uncompressed 8bit and 10bit SD; which ProRes 422 data rates easily match.
Given the IoHD can encode and decode in hardware; I don’t see why the host machine needs to be *that* powerful; although you’ll likely want a powerful machine anyway. I don’t see why any dual G5 2Ghz or better should have a problem with this.
H.264 takes a lot of processing power to decode, and Apple always had the requirements a lot more steep for x86 machines; granted they did not have the new Core chips out yet, but it still seems fishy regarding ProRes, which actually should be easier to encode and decode since it is a I-frame full raster format.
If a laptop can do it (which has slower memory, a slower FSB, etc etc), then I see no reason why the G5 machines would have problems.
-mark
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This is quite disappointing news. I really find it hard to believe Apple can’t get a G5 able to handle the ProRes 422 format, using a IoHD. If a MacBook Pro (2.33 Core 2), which by all measures is basically as fast as a dual 2Ghz G5, what gives? I have both, and the G5 is actually faster at most things video wise.
I understand progress, but this looks to be like shooting one’s self in the foot. If the IoHD handles the codec encode/decode in hardware, a fairly low end machine should be able to shove the footage back and forth provided it has the disk i/o.
If Apple is somehow scanning the machine config (like how it scans for RT Extreme) and forcing the codec not to work on G5 machines I am going to be very pissed. This is almost what it sounds like.
-mark
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AJA has the best tech support I have ever experienced. Even more impressive in the fact that they help the “little shops” just as equally as the big ones. And I don’t think I’ve ever had an issue with our AJA IoLA that was not solved in under an hour. The only reason I even have weirdness is when the edit system travels. Other than that, it is smooth sailing 100% of the time. For such a versatile box, I am amazed that other companies charge what they do for lesser DV25 only bridges.
-mark
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Just get the PCI FW800 card from G-technologies, the things are cheap and you get three FW800 ports.
AJA does not certify that the Io will work correctly when you have multiple FW devices connected to same buss as the Io.
Quick note for Steve, the G-RAID is actually 2 hard drives in a hardware controlled RAID 0 config over a single FW800 bus. They can handle a single stream of UC-10bit. G-RAIDs are also set up so that one drive writes from the inside out and the other from the outside in, so you never lose performance as the drive fills up. They really are the best FW800 drives on the market right now, in my opinion.
-mark