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Old 01-23-2017, 06:59 PM   #1
marco
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Default CPU for editing 4K

Hi,

I'm trying to figure out the best specs for a single cpu pc for 4k editing.
Do you think that a workstation with a CPU i7-6900K 3,20 gHz LGA2011-V3 20MB Cache, 24GB DDR4, SSD system disk, 2 7200 2TB HDD in raid0, will work for edit 2 layer of 4k video in real time with edius8 ?

Thanks in advance
marco
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Old 01-23-2017, 11:11 PM   #2
mark williams
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This is what I have on order after much research to edit 4K on a low budget. I do mainly one video stream, cuts, dissolves, and minor color correction.

- Carbide Series Clear 400C Compact w/ Window, Case
- Z170-A, Intel Z170 Chipset, LGA 1151, Motherboard
- Core i7-6700K Quad-Core 4.0 - 4.2GHz
- 16GB Kit (2 x 8GB) Ballistix Sport LT® DDR4 2400MHz Memory
- SuperNOVA Series 550 G2 550W, Power Supply
- Shadow Rock Slim, CPU Cooler
- 250GB 960 EVO , M.2 SSD system drive
- 250GB 850 EVO SSD video storage drive plus already owned SSD's
- Windows 10 Home 64-bit DVD OEM
- Use onboard graphics to run Edius 8 Workgroup to monitor. Add graphics card if necessary.
- Use Blackmagic 4K Intensity pro card to preview/realtime monitor.
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Old 01-23-2017, 11:48 PM   #3
Liverpool TV
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Hi Marco.

It all depends on the type of editing you are going to be doing and effects etc.

If you are into what I call 'drama type cutting', by that I mean a few timeline tracks and only one active video element at any one time, then a modest system will do this. My main system, just like a number of signatures on the forum, is based around a 4790K i7. I also use a bog standard, no fancy features, Z97 motherboard, being a Gigabyte GA-Z97-D3H. Unlike most users, I only use 8GB of Balistix Sport, and it's all that's needed for Edius and my DAW software. This system easily handles bog standard UHD codecs, XAVC variants etc. HQ/X and a few other NLE system codecs. I do a bit of colouring, dissolves and use layouter. If I start tipping the CPU over, I drop the playback resolution on E8WG and stay realtime, then switch back to full for final renders. I've not tried Red or Uncompressed etc.

If you are wanting to go mad with compositing or loads of filters or more esoteric codecs, then your hardware requirements will be a lot more. If you plan on using other software, this would also be a consideration for your hardware, GPU, RAM, CPU etc. But if it's Edius only, you don't have to over spend.

Cheers,
Dave.
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Old 01-24-2017, 10:46 AM   #4
marco
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Mark and Dave
thanks a lot for your advice!

So I suppose that the 8 cores of the i7-6900k vs the 4 cores of the i7-6700k will give better performance for real time editing. Does the 6900k worth the money?

thanks
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Old 01-24-2017, 11:09 AM   #5
David Clarke
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It also depends on the footage. For example it is really hard to get EDIUS to playback ProRes 4K footage. With the processor you mentioned I could manage just about 2 layers of ProRes buy 4-5 layers of Grass Valley HQX.

Or is it H.264 based footage? I can manage about 3 layers of that on the 6900K but I can do nearly as well on a Skylake/Kaby lake i7 because it uses Quick Sync to help the playback (and is a bit cheaper than the 6900K).
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Desktop: 2Ghz 12 core Xeon processor, 32GB RAM, nVidia 1060, BM Intensity Pro, Windows 10
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Old 01-24-2017, 11:30 AM   #6
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But they are not. I can play more layers of GV HQX than I can ProRes.
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Old 01-24-2017, 01:09 PM   #7
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Quote:
Originally Posted by David Clarke View Post
But they are not. I can play more layers of GV HQX than I can ProRes.
This is exactly right. I've always found this to be the case and regardless of the CPU.

As David has said, you will get more streams with the more powerful modern CPUs depending upon the codecs, and lower powered CPUs with QS will still work quite well if using h.264 based codecs.

I mostly use HQ/X and h.264 codecs. For me personally it's not worth upgrading beyond the 4790K, for what I do, as similarly positioned modern i7s wouldn't give me the performance boost that would justify a new MB, CPU and RAM.

Plus the combination of the 4790K and a my Z97 MB allows me to use multiple operating systems. I use Win 10, Mac Seirra, Linux and a couple of others. This would be harder to do or not possible on certain modern CPU and MB combinations.

If I were building a new machine right now to do what I do, and not overly concerned about multi booting. I would go for the 4790K equivalent in the modern range, as per David's suggestion.

My next upgrade, if required because of codecs and filter/processing requirements etc. would be something with a higher core count. This would serve beyond Edius and help to do more and speed up a number of tasks.

As has been said, it's really down to what you are doing and what you are using.
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If you don't know the difference between Azimuth and Asimov, then either your tapes sound bad and your Robot is very dangerous. Kill all humans...... Or your tape deck won't harm a human, and your Robot's tracking and stereo imagining is spot on.

Is your Robot three laws safe?
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Old 01-24-2017, 02:54 PM   #8
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Hopefully Jerry will stop by but from learning about Edius from Jerry, performance inside Edius is more about CPU clock speed than number of cores to some extent. Meaning a 4.7GHz CPU might do better for playback than 4 3.0 GHz CPUs.

Now for encoding it is a different story. an 8 or 10 core CPU will be better than a 4 core. So if you are going for one of the 8 or 10 core machines, it is worth it to seek out somebody to overclock it properly as it will improve your Edius playback while giving you an encoding edge.
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Old 01-24-2017, 06:02 PM   #9
Liverpool TV
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Quote:
Originally Posted by Bassman View Post
Hopefully Jerry will stop by but from learning about Edius from Jerry, performance inside Edius is more about CPU clock speed than number of cores to some extent. Meaning a 4.7GHz CPU might do better for playback than 4 3.0 GHz CPUs.

Now for encoding it is a different story. an 8 or 10 core CPU will be better than a 4 core. So if you are going for one of the 8 or 10 core machines, it is worth it to seek out somebody to overclock it properly as it will improve your Edius playback while giving you an encoding edge.
Hi Tim.

Although clock/core speed will make a difference, a higher core count CPU will give better performance and ability within editing, not just encoding.

Edius may to may not be the best optimised for a multi-core CPU, a ten core i7 for instance. But beyond over clocking a quad core, you do need the extra cores.

In the end, even if efficiency may be questioned, you inevitably have to go for more cores to process more in Edius. I personally don't feel the gains justify the cost for me right now, but at some point I will have to stretch to a multi core CPU, regardless of the lack of exponential gain.

I've tested Edius on a 12 core Mac Pro and have not seen anything like it before, it was seriously powerful.

On the other hand though, and I may be wrong. I think dual CPU is where the fall off really happens with Edius??

Cheers,
Dave.
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"There's only one thing more powerful than knowledge. The free sharing of it"

If you don't know the difference between Azimuth and Asimov, then either your tapes sound bad and your Robot is very dangerous. Kill all humans...... Or your tape deck won't harm a human, and your Robot's tracking and stereo imagining is spot on.

Is your Robot three laws safe?
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Old 01-24-2017, 07:01 PM   #10
Khoi Pham
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Look at my system below, it can do 3 layers and a dissolve transition in realtime, one layer has 3 filters (primary color corrector, soft focus, sharpness), the other layer has the same 3 filters + a mask filter, and on top a quick title. What it can not do in realtime is optical flow if the clip's frame rate is different from timeline frame rate, even if there are no filter on that clip. Rendering to Blu-ray without quick sync is a slower, rendering to 4K is faster and cpu max out all the time at 3.97.
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