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My multicam edit has just started to stutter
Hi Guys
I am using an 8 core (2×3.2ghz Quad), 8 Gig Ram, and 3 Sata x 1 TB of internal storage (WDC WD10EACS-00ZJB0) Drives. I have filled up 2 of them to about 70% and the other to about 20%.
I have been editing 1080i footage, captured proRes from 3 cameras. I have been using the multicam sequence feature on the latest version on FCP, and i have been getting through it quite quickly. However just lately, certain multicam sequences have been starting to stutter and become impossible to edit with. I am using 3 angles in the multicam viewer window. I have tried editing only 2 angles, and this does not produce the stutter appearance.
I have ingested around 33 hours of material, and my finished project will be around 6 hours. I am 3/4 of the way through and have not come accross this earlier in the project, which have always been with 3 camera multicam sequences.
I have also tried editing the end of the project (thus skipping the problem edit), and have had success with editing the end.
I do not have a problem when viewing back all my previously edited footage.
I have tried reducing the frame rate and the quality of the playback settings, yet this does not prevent the stutter and subsequent vision freeze. I have even moved the specified footage from the drive and onto the system drive, yet the problem remains.
I have tried to reduce my project to include only the part that i am upto, and again, the problem remains.
The footage (ie the vision material) is no different to the earlier edited piece and has been captured as 1440×1080 ProRes.
Please can anyone offer any suggestions?
Thanks
Max -
13 Replies
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Do you have a Kona or Decklink?
The 1440 “thin raster” frame size is more processor intensive than full raster 1920 as it must be scaled up on the fly. Kona cards do this in hardware which takes the burden off the host processor.
You might also try turning off realtime scopes if you have that turned on. I have seen that help with DVCPRO HD, which is also needs to be scaled.
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It could be your drives and where the video was captured. If some of the video was captured toward the outside of the spindle (you said your drives were 70% full it is possible that you would get some stutter.
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Are your drives in a RAID configuration?
John
MacPro 8-core 2.8GHz 8 GB RAM OS 10.5.5 QT7.5.5 Kona 3 Dual Cinema 23 ATI Radeon HD 3870, 24″ TV-Logic Monitor
ATTO ExpressSAS R380 RAID Adapter, PDE Enclosure with 8-drive 6TB RAID 5Final Cut Studio 2 (up to date)
Pro Tools HD w SYNC IO, Yamaha DM1000, Millennia Media HV-3C, Neumann U87, Schoeps Mk41 mics, Genelec Monitors, PrimaLT ISDN
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You REALLY need a RAID instead of individual drives.
Steve Eisen
Eisen Video Productions
Board of Directors
Chicago Final Cut Pro Users Group -
For real on the RAID.
But stuttering like you described sounds like hard drive read issue. You can lower the RT settings but the computer still has to pull the full amount of data off the drives.
Do you have each angle on a different drive? If not try that to see if that gets you back on track. As soon as you can set your drives up as a RAID. I put 9 streams of ProRes 1920x1080i 29.97 fairly well but I have a cheap but fast 10 drive RAID 0 on the original 8-core.
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Thanks guys
No raid setup on this mac and there is no card iether. I am actually borrowing this mac and would hate to mess with my friends machine.
I set the RT settings real low but that did not have an effect on playback.
I thought as much, with the location of the files on the drive, hence why i moved it to another, but the problem continued.
Can i down rez the files and work with low rez proxies, or am i wasting my time?
I will try and set up the angles on different drives, as they are currently grouped into the time of day the footage was shot.
Cheers
m. -
Im going to try and move the footage onto different drives. Theres about 1.5TB so its going to take a while.
Is there anything i need to do with FCP. I would hate to undo everything i have done for the last week.
THanks again
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It’s not an FCP issue, its a hardware issue – your drives simply cannot playback your video.
How did you ingest this footage without a card?
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Firewire….Followed Chris Poissons tutorial. The footage is HDV.
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[Max Huggett] “No raid setup on this mac and there is no card iether”
You can set up a raid using disk utility without a raid card.
[Max Huggett] “I am actually borrowing this mac and would hate to mess with my friends machine. “
Well a couple of thoughts on that.
A. Talk to your friend about setting up a raid.
B. You could simply buy 2-3 drives yourself then remove his drives and set up a raid with your drives. (drives are cheep these days)[Max Huggett] “I have been editing 1080i footage, captured proRes from 3 cameras. I have been using the multicam sequence “
The data rate for 1080 ProRes is between 16-42 Mbytes/sec depending on the frame rate. So do a 3 camera multi clip you would need a drive that can do 48-128 Mbytes/sec because all 3 videos are playing at the same time.
I would never consider doing a 3 camera multi cam with out any sort of raid.
Some great little apps for you would be the AJA Data Rate Calculator and the AJA System Test
https://www.aja.com/products/software/They are great little apps to let you know what space and speed of drives you will need, and also to test the speed of your drives.
There are no “technical solutions” to your “artistic problems”.
Don’t let technology get in the way of your creativity!
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