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Severe Playback problem – Dropping Frames.
I am working with Final Cut Pro on a new Mac Pro quad core 2X3.3Ghz with the Caldigit HDOne raid as my video/scratch drive. The drive info reports a raid capacity of 3.18TB with 2.37TB used and 836.71GB available. The computer has 8GB of RAM.
I am working on a a Prores 422 HQ 1080 HD sequence. The project is about 10 minutes in length.
The problem is that a few days ago I began to get skipped/dropped frames. I’ve had this before on 1080 Prores 422 sequences and turning down the playback quality always fixed it. But this problem just seems to get worse and worse. I have all my RT settings at their lowest, external video is off, video playback is off, clip size on the timeline is set to small. I only have the Viewer and the canvas open plus of course the sequence timeline.
But the playhead is skipping frames like mad, freezing for a few seconds then suddenly skipping ahead 30 seconds and then stalling again then stopping cold with the spinning color wheel popping up. There are no effects other than dissolves in the sequence. Everything that needs rendering has been rendered.
I even tried to create another sequence with a Prores 422 1080 non HQ setting and copied pasted and then rendered my 1080 ProRes HQ timeline and I still have the same problem.
For the first few days the problem was intermittent but now it won’t playback more than 5-8 seconds without stalling and giving me the error message below.
I am getting the following error message: RT EXTREME HAS DETERMINED THESE DROPPED FRAMES WERE CAUSED BY SLOW DISKS. PLEASE TRY: INCREASING THE SPEED OF YOUR DISKS, DECREASING THE NUMBER OF RT LAYERS, LIMITING YOUR RT BANDWIDTH IN USER PREFERENCES.
Interestingly if I use the standalone Quicktime player and play back the individual Prores files that are in the sequence from their folders on the drive, they are fine. I guess this rules out a RAID playback problem? I am wondering if the slow disk error message could be being caused by something other than slow disks.
Older projects using the same types of clips and the same settings playback OK. Again, I guess this rules out a drive problem. Although on my old NLE system timeline playback did slow sometimes when the RAID began to get full but as I said above I still have 800GB of space left.
It’s a simple timeline, no efx stacks, and, as I said above, only dissolves.
Any ideas as to the cause of this would be appreciated.
Thanks,
Sam -
6 Replies
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Run DiskWarrior (or TechTools, or Drive Wizard) in your System and media discs
rafael. -
Rafael- I have about 30% of the RAID empty 70%used. Could this be as simple as the drives filling up?
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Hi Sam,
That’s a lot of free space.
You should download the AJA Utillities and run the AJA System Test to check your HDs speed.
Anyway I keep suggesting you run one of those applications.
Cheers,
rafael -
OK I’ll do that…thanks.
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Bad Drive in the array- need to swap it out and do a parity rebuild. Damn thing is only 6mos old.
Thanks. -
I have the same problem, and I cannot figure out how to solve it, if you can please tell me how you worked it out at the end or i anyone can give me any tips i would appreciate it
Thank you
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