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Dropped Frame issue capturing DV50
I am trying to figure out what I am doing wrong. I have a Mac Pro, FCS 5.1.2, latest os and firmware, 2 GB Ram (correctly installed), a G-Raid hooked up via FW800 and a AJ-HD1200A deck properly configured for DVCpro50 (422) over the firewire interface which is connected to a FW400 port. I am trying to ingest half hour tapes that were shot 16:9/50m/24pa on a SDX900. I’m not trying to remove the pulldown, so I’m using the DV50 NTSC Anamorphic Easy Setup.
I keep getting dropped frames. Sometimes it will go as long as 15 minutes, sometimes it aborts after a few minutes. If I set it to ignore dropped frames, I end up with files with duplicated frames all over the place to fill during the drops. It seems once it starts to drop frames it goes batty dropping them all the time.
I’ve re-launched, I’ve trashed all the pref files, I’ve turned off auto-save. I don’t think I should need a separate ieee1394 PCIe card. (There’s not too many of them out there.)
Idea’s?
MacPro 2×2.66Mhz, 2GB Ram, LaCie Biggest F800, AJ-HD1200A
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11 Replies
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[Sam Goldstein] “I don’t think I should need a separate ieee1394 PCIe card.”
That’s where you are wrong. The internal firewire busses are shared in Macs. There is too much information that is being passed around on the bus and FCP can’t keep up.
Separate your firewire devices with a FW card and you will be fine.
Jeremy
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I thought that was the case with older Dual G5’s and prior Macs, but the newer ones were no longer using shared buses. Perhaps I was misled? Can anyone else confirm?
MacPro 2×2.66Mhz, 2GB Ram, LaCie Biggest F800, AJ-HD1200A
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I can confirm. ALL Macs have one firewire bus. Multiple ports on some, but still the same bus. Firewire 800 and firewire 400 share the same bus in fact. If you have a FW 800 drive connected, then connect a FW400 to the 400 slot, your 800 drops in speed to 400.
Insane, but true. How hard would it be to have a different FW bus? How much more expensive?
just get a $30 PCI card and you’ll be set.
Shane
Littlefrog Post
http://www.lfhd.net -
I can’t seem to confirm success of any PCIe ieee1394 cards on a Mac Pro. (See previous post for recommendations from about a few weeks ago.) There’s not a lot choices. If anyone can recommend??
MacPro 2×2.66Mhz, 2GB Ram, LaCie Biggest F800, AJ-HD1200A
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https://www.newegg.com/Product/Product.asp?Item=N82E16815104261
https://www.newegg.com/Product/Product.asp?Item=N82E16815150063RHmmm…these seem more expensive than the PCI-X cards…wonder why?
Shane
Littlefrog Post
http://www.lfhd.net -
You don’t believe me, you can read the Apple developer website and check out the block diagram for the MacPro.
It’s all there for you in pretty pictures:
Enjoy!
Jeremy
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Thanks for the diagram, that ends the speculation. The confusion stemmed from this thread… https://forums.creativecow.net/cgi-bin/new_read_post.cgi?univpostid=910919&forumid=8&postid=910919&pview=t
So I ordered the Koutech PCIe card linked above by Shane Ross despite any documentation that it will actually work on a Mac Pro, the manufactures website says it works on Dual G5 macs. No info whatsoever for compatibility with Intel-based Mac Pros, no firmware downloads either. I guess I’ll find out in a few days.
MacPro 2×2.66Mhz, 2GB Ram, LaCie Biggest F800, AJ-HD1200A
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[Sam Goldstein] “o I ordered the Koutech PCIe card linked above by Shane Ross despite any documentation that it will actually work on a Mac Pro, the manufactures website says it works on Dual G5 macs”
Sam
on the aja website the link for the drivers <https://www.aja.com/ajashare/KonaLH_Software_3.1.tar> talks specifically about the universal binary version, and that is what is needed for working on the macpro’s.I can assure you that a number of people are using their kona cards in this manner, I know that walter and I are.
gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows -
Aja website, for a ieee1394 PCIe card, really? Can you give me a link or clarify further?
MacPro 2×2.66Mhz, 2GB Ram, LaCie Biggest F800, AJ-HD1200A
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[Sam Goldstein] ” Can you give me a link or clarify further?”
Sorry Sam, Operator error,
I was responding to a different post.gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows
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