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Jerky playback
I’ve recently revamped my edit suite and I’m getting very jerky playback once I reach 10 or 20 seconds down the timeline. This is mainly apparent on my video monitor, much less noticeably (but more expectedly) on the computer screen in Premiere. I’ve moved from FCP and and older analog AJA card. Here’s my modified setup:
Adobe Premiere CC 7.2.2
Apple Mac 2×3.2 Quad core Intel Xeon tower
8 GB 800 MHz DDR2 RAM
Radeon 4000 CUDA card
Blackmagic SDI monitor card
Sony OLED Trimaster EL 22″ using the SDI input
Media is playing from a Lacie hardware RAID box using ESATA cables to a 4 port Sonnet Tempo E4PIf I stop and replay the jerky section, quite usually the smooth playback resumes, but then starts up again 10 seconds or so later. This is after rendering the whole timeline (its green) with the Render Entire Work Area command.
I’m going to start troubleshooting once the current edit is finished, but just as well there are no clients at the moment as it’s really unwatchable, especially pans and zooms.
Thought I’d post before I start in case anyone thinks “ahh yes I had that – it’s easy to fix, just …….” well I’m just hoping!
Cheers, Ken.
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3 Replies
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I think the main issue is probably just overall system spec. Stutter after 10 seconds seems to suggest that PPro is buffering up, but the system can’t keep up with ongoing playback…not sure what kind of media you’re using. This kind of thing with more compressed formats would point to the CPUs as the probably bottleneck…less compressed formats might have me looking harder at the media drives.
6 years is an eon for GPU cards, and the Radeon 4000 (introduced in 2008) is not a CUDA card…only NVIDIA has CUDA, AMD uses OpenCL, but that GPU card can’t help with PPro CC, so you’re getting no help GPU-wise.
8 GB of RAM is enough to launch PProCC, but I have 16 GB in my several year old laptop…I’d suggest doubling the RAM at absolute minimum. (more would be better)
The Nehalem processors always seemed pretty snappy to me, and the faster clock speeds should help with decoding aggressively compressed formats like H264…but getting a better GPU will definitely help with scaling, color interpolation, etc, but video decoding is specifically based on CPU. Large data rate, I frame formats shouldn’t be as big an issue for the CPUs.
TimK,
Director, Consultant
Kolb Productions,Adobe Certified Instructor
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Solved already! A beginners mistake probably. In the Premiere sequence settings I had selected Blackmagic Uncompressed as my Editing Mode, and in Preview Settings, Blackmagic RGB 10bit as my codec. Changing the codec to ProRes seems to have sorted the problem and I still get a picture on my monitor. Plus I can export my timeline in 3 minutes instead of an hour. Plus Plus. Don’t know what impact changing the Edit mode will have, what does this do anyway? Must read the manual!
Cheers, Ken.
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Thanks Tim – sorry it’s the NVIDIA 4000 with 256 CUDA cores not the Radeon, my mistake, just bought it quarter price ex-demo. Would have liked a faster card but so much else to get. I’ll look at the RAM issue though – and see what price I can get on 16GB or more as you recommend. As you might have now seen with my earlier post, problem solved for now though so I’ll plough on and see how the system responds.
Cheers, Ken.
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