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dropping frames on one project timeline
I am experiencing dropped frames after 10 seconds of playback on one project timeline and am wondering why. It keeps stopping playback on a project that is full of XDCAM EX 720P30 (35Mb/s VBR) clips that list their data rate as 4.3MB/sec. The system plays 1080P 4:2:2 Pro-Res HQ projects fine with data rates of 21 MB/sec. I’ve run disk warrior and fixed permissions etc. Other apps run fine. Any advice?
OSX 10.5.5 Kona 3 Kona 6.01 QT 7.5.5
Mac Pro 2 – 3.32 Quadcore 8Gig Memory,
eSATA disk array that is 20% full.
Aja System Test 512MB File size, 1920X1080 10bit:
Write 174 MB/s Read 205 MB/s With 1 Gig file size it’s 219 MB/s for both read and write. -
11 Replies
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Yeah, XDCam sucks. Does that help?
Sorry, April Fools Day, so that means I get to be a fool today.
In all seriousness, I was finding this type of thing too on first recent XDcam project. It wasn’t until I started editing in a ProRes timeline that I could get stable playback.
What easy setup are you using? Have you tried the Kona HDV playback setting?
Jeremy
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After putting color correction and dissolves etc. it needed rendering and that seems to be set at Apple ProRes 422HQ 1920 by 1080. The rendering elminated the red bars which are now blue above the timeline. Most of the clips were 720P but the timeline is 1080P by 1920 It seems to play better if used Kona playback presets, and much worse set at destop preview. Why would a high data rate timeline play fine as a desktop preview but not EX footage?
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I think it’s the nature of the codec. XDCam is a long gop mess and FCP has a tough time with it.
That’s what I told myself anyway.
Jeremy
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thanks for the reply but once it is rendered it isn’t long Gop is it?
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Not if it’s in a ProRes timeline.
ALso, why are you editing 720p footage in a 1080 timeline?
Take your 720p XDcam footage, make a 1280×720 ProRes timeline (with an AJA 720p ProRes easy setup), and things should run a bit better after you render.
Jeremy
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Some of the shots are 1080P & I wanted to not lose that quality.
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Yeah, but if MOST of your footage is 720p, I’d edit 720p.
Jeremy
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thanks, I’ll consider it next time but the timeline still seems to drop frames though I don’t get a reported error window. I hope I don’t need to drop to 720P just to get stable playback out of the Kona.
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YEs, this is exactly what I had as well.
What codec is your timeline?
Jeremy
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Jeremy,
I believe the sequence is 1080P 29.97 proRes422HQ, but at least that is what I have the render setting. How can I confirm this?
I am transitioning from an old Media 100 into Final Cut and am a bit murky about the difference between projects and sequences.
I have three projects in the browser and three corresponding sequence tabs in the timeline. Two are 1080P /24f ProRes 422HQ and this one 1080P 29.97 project. Could this be causing the problem?
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