CPU for handbrake (4k UHD) and image editing ($200 - $400)

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linuxuser
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CPU for handbrake (4k UHD) and image editing ($200 - $400)

Post by linuxuser » Sun May 26, 2019 1:38 pm

I want to build a new system especially for handbrake and darktable using Ubuntu. The system should be "good" for coding "4k / UHD" videos and for 36MP image editing with darktable.

Normally I buy cpus for about $/€ 200, but it looks like there is no chance to get a reasonable cpu at this price. So I decided to spend more money, but not more than $400. Don't know for sure, but I think it should be an 8core and 1 core should have 3GHz minimum for programms which do not support multicore.

There is also spectre, meltdown a.s.o which makes everything slower. I don't care about AMD or Intel, encoding time is, what counts.

Thanks for your suggestions.

rollin_eng
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Re: CPU for handbrake (4k UHD) and image editing ($200 - $400)

Post by rollin_eng » Sun May 26, 2019 1:48 pm

Looks like the i7 9700k can be had for $400.

Should be pretty good for encoding.

linuxuser
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Re: CPU for handbrake (4k UHD) and image editing ($200 - $400)

Post by linuxuser » Sun May 26, 2019 6:52 pm

What do you think about these cpus compared to the i7 9700k?

AMD Ryzen Threadripper 1900X, 8x 3.80GHz
AMD Ryzen Threadripper 1920X, 12x 3.50GHz

I have read somewhere, that too much cores reduce the quality. How many cores are ok?

How much faster would be encoding with an AMD Ryzen Threadripper 1950X. Well, this cpu would be too expensive too me, but it would be interesting how much faster it gets.

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s55
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Re: CPU for handbrake (4k UHD) and image editing ($200 - $400)

Post by s55 » Sun May 26, 2019 7:09 pm

I'd hold off until July for Ryzen 2 before investing in Threadripper.

linuxuser
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Re: CPU for handbrake (4k UHD) and image editing ($200 - $400)

Post by linuxuser » Sun May 26, 2019 10:45 pm

No problem to wait, but I doubt it is a good idea to use a brand new cpu with an old linux kernel.

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Re: CPU for handbrake (4k UHD) and image editing ($200 - $400)

Post by nhyone » Mon May 27, 2019 1:36 am

linuxuser wrote:
Sun May 26, 2019 6:52 pm
I have read somewhere, that too much cores reduce the quality. How many cores are ok?
Perhaps here? Request for (cpu-)benchmarks :lol:

TL;DR
With this test file, I got 379.1 MB with 4 threads, but 395.0 MB with 40 threads, using x264 slower preset.

Using more cores do not reduce quality, it just reduces encoding efficiency. This is for x264. It may or may not be true for x265.

musicvid
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Re: CPU for handbrake (4k UHD) and image editing ($200 - $400)

Post by musicvid » Fri Jul 26, 2019 1:03 pm

Using more cores do not reduce quality, it just reduces encoding efficiency. This is for x264. It may or may not be true for x265.
+1
It is true for x265. I call it the "pizza kitchen" rule. If I have eight guests, it takes more time to slice and serve sixteen slices per pie than eight.

rollin_eng
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Re: CPU for handbrake (4k UHD) and image editing ($200 - $400)

Post by rollin_eng » Fri Jul 26, 2019 1:32 pm

musicvid wrote:
Fri Jul 26, 2019 1:03 pm
Using more cores do not reduce quality, it just reduces encoding efficiency. This is for x264. It may or may not be true for x265.
+1
It is true for x265. I call it the "pizza kitchen" rule. If I have eight guests, it takes more time to slice and serve sixteen slices per pie than eight.
But if you have 4 times the people serving (threads/cores) then it should be faster.

linuxuser
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Re: CPU for handbrake (4k UHD) and image editing ($200 - $400)

Post by linuxuser » Fri Jul 26, 2019 3:32 pm

I will wait until october and at the moment the Ryzen 7 3700X is my favorite for handbrake. If it makes sense I can imagine to buy the Ryzen 9 3900X, but the reviews I read, say the the 3900 is about 20% faster than thte 3700 with multimedia, while the price is a lot more expensive then 20%.

musicvid
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Re: CPU for handbrake (4k UHD) and image editing ($200 - $400)

Post by musicvid » Sat Jul 27, 2019 12:39 am

but the reviews I read, say the the 3900 is about 20% faster than thte 3700 with multimedia,
Unfortunately, video encoding has nothing to do with multimedia performance, and you will often see lowly four-bangers with eight threads encoding nearly as fast as Ryzen, for hundreds of dollars less. 6-8 threads is considered about optimal for video encoders, no matter how many times you slice the pizza.

Be sure to look at video encoding benchmarks if that is what you are building your machine for; gaming specs simply don't translate.

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Re: CPU for handbrake (4k UHD) and image editing ($200 - $400)

Post by mduell » Sat Jul 27, 2019 12:48 am

musicvid wrote:
Sat Jul 27, 2019 12:39 am
but the reviews I read, say the the 3900 is about 20% faster than thte 3700 with multimedia,
Unfortunately, video encoding has nothing to do with multimedia performance, and you will often see lowly four-bangers with eight threads encoding nearly as fast as Ryzen, for hundreds of dollars less. 6-8 threads is considered about optimal for video encoders
While the gains are non-linear after 6-8 threads, there's plenty of performance to be had with more, especially with efficient settings.

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