How To Edit 8K Video - Threadripper + Ultrawide #Helpful Post

 K red code raw footage how do you

work with files that are multiple

hundreds of megabytes per second of

recording with a complex and proprietary

compression algorithm that allows them

to retain effectively nearly the full

raw quality of the footage while taking

up a fraction of the space well

LG's Monitor team seems to have an

interest in this and the many

technological challenges faced by

creative professionals because they

sponsored this video featuring their 49

WL 95 C otro wide monitor where I'll be

figuring out just that so in the old

days when anywhere from 4 K to 6 K was

cutting-edge the solution was this $7000

red rocket X card but in spite of it

using either a custom ASIC or an FPGA so

both highly specialized Hardware even

these puppies were easily overwhelmed by

the epic W and the red weapon featuring

reds 8k helium sensor so now this is

basically an expensive paperweight ha

that's the that's the joys of cutting

edge technology right fortunately NVIDIA

has been running around doing demos with

their arty x-series graphics cards

showing GPU accelerated real-time full

quality 8k playback so then is this the

new way now $1300 is still a lot of

money but it's a lot less than $7,000

could this be progress there's only one

way to find out

so my first encounter with this monster

was back at CES and while 49 inch ultra

woods like this one so 32 by 9 aspect

ratio look at this thing

have existed before what makes this one

special is that the pixel density since

its effectively 5 K by 1440 is much

higher than the ones that have existed

before making it actually suitable for

creative work so it has become apparent

that I'm going to need to clear some

space so it has become apparent that I'm

going to need to clear even more space

wow that's a lot of time line even with

my task manager open here

okay so first order of business is to

fire up a plausible project so this is

an episode of fast as possible and use

the the normal workstations that we have

downstairs so my CPU is a little better

this is a 79 80 XE 18 core processor and

this is a GTX Titan X Pascal so first

things first we've got ourselves at

one-quarter resolution you can see

scrubbing around in the timeline nice

and responsive playback basically

instantaneous but whenever I'm not

paused you can see it's quite fuzzy not

representative of the finished product

so let's crank it up to full so this is

a K and this is working just fine no

problem whatsoever and in fact while I'm

playing it back we're sitting at a mere

10 to about 30% CPU usage and our GPUs

sittin tight at 25 to 30% so at first I

was kind of confused by all of this it's

been a while since I've looked into a K

performance on the timeline and I was

thinking well hold on a second is there

nothing special about these r-tx cards

that makes them suitable for this why

does Nvidia keep talking about this and

then

I remembered something we shoot most of

our projects at a much higher

compression ratio than what they would

use while shooting a VFX heavy Hollywood

production for example so our data rates

are much lower so let's go get some

seven-to-one footage so let's start with

a sample from red here this is a 7 to 1

compression ratio 8k clip that was

recorded at 24 frames per second so

let's go ahead and fire this bad boy up

hit that playback button it oh we are

looking at spikes of up to 95 percent on

our GPU and CPU usage that is pinned at

100% while trying to playback that clip

that is a stark contrast to the I think

we use 2001 is that right David to the

20 to 1 footage that we capture and

that's not even the worst of it here's

some 8k 7 to 1 footage at 30fps that we

captured let's go ahead and drag that

onto the timeline

yeah whoof not quite

yeah he moves like that sure why not so

what's weird though is that even with

the heaviest footage that we could throw

at our workstation our GPU is actually

neither sitting idle nor completely

maxed out so it's being used to handle

the debayering process which

reconstructs the full color image that

we see here from the samples that are

collected by the image sensor but our

CPU is still in charge of the entropy

decoding which is a process that allows

the most common input signals to be

substituted for much shorter ones saving

space and wavelet decoding which frankly

I'm not familiar enough with to offer

even a basic explanation and the

Wikipedia article wasn't much help

anyway though so it's maybe our problem

here is we just need more

cpu horsepower to keep our GPU fed AMD

to the rescue then why don't we try

going from 18 to 32 processor course

building improvements Oh mission failed

okay it worked didn't do anything and

interestingly our GPU usage is higher

near a hundred percent so this is kind

of fascinating I've said it many times

before that every system is effectively

bottlenecked

because there's something that is

slowing down the process or else it

would be infinitely fast but this is

like double bottleneck

it's like they're perfectly matched to

each other but still not enough for the

task this is great to look what happens

to Timeline scrolling when my CPUs at a

hundred percent usage so while I was

troubleshooting to prepare for this

video I actually spent some of my time

with the r-tx twenty eighty rather than

the r-tx twenty atti

because what I thought was that this

functionality had something to do with

their new and vank engine but actually

it doesn't in fact there's nothing about

the tensor cores or the ray-tracing

cores or anything like that that makes

the r-tx cards so good at this it's just

the sheer frigging processing power of

all those CUDA cores so we are gonna

jump for 8k seven to one footage

straight to the RT X xx atti and you

might think to yourself well gee Linus

that's a 1,200 to 1,300 US dollar

graphics card of course it can handle it

but that's not necessarily to be taken

for granted I mean we installed CPUs

that cost up to two thousand dollars and

they couldn't do it it's all about

having the right tool for the job okay

everything's working normally here we go

this is the moment

I mean now that is kind of gotten its

act together that's a lot better we are

now at a hundred percent CPU 95% GPU but

we are still dropping frames so that's

it then no CPU on earth can handle this

30 frame per second 8k seven to one read

code raw footage at least not as long as

it has to handle the entropy decoding

and wavelet decoding what if we could

offload those to the GPU we are going to

need a beta version of Reds decoder that

unfortunately isn't supported by Adobe

Premiere at this time fortunately it's

built into the beta of redson DX pro and

we're gonna start with the 24 FPS

footage now it's a little flaky right

now I'm actually not sure if this is

going to work but let's go ahead and

give it a shot so we're gonna enable GPU

decode and it's flaking out on me so

it's running it like eight frames per

second fortunately the fix right now

seems to be to just toggle between image

pipelines and there it is smooth 8k

playback that hitch by the way is the

clip restarting but that's not even the

most impressive part so our CPU is

sitting at just 10% utilization and our

GPU is up at 77 80% utilization so we

potentially have some Headroom to spare

so our overall usage for the system is

way down like 10% of our 32 cores we

could be doing this on a more human

workstation you know one with six or

eight cores by offloading this work to

the GPU because the thing to remember as

well is that when we were pinning both

our CPU and GPU at a hundred percent

that was just playback

we weren't even applying any real-time

effects like denoising the footage or or

anything like that we were at the limit

now we have Headroom to play with

let's go ahead and try our 30fps footage

though that's actually working a little

bit better than I expected when I the

first time around I actually had to

overclock the GPU a little bit to get

this quite so smooth but you know what

I'm taking it so there it is our GPU

CUDA usage jumps up near 90% but our CPU

stays at 10% and we are smoothly playing

back seven to one 8k red footage at

29.97 frames per second we get some

applause sound effects in the video or

something I don't know

this is crazy so all that's left now

then is to thank LG for sponsoring this

video featuring their 49 WL 95 C W

ultrawide monitor I mean I think it's

pretty obvious why they wanted us to

feature this in this video because it's

designed for content creators like

photographers filmmakers music producers

and more who can really benefit from

this kind of a canvas being able to work

on more than one thing simultaneously or

just be able to manage and see extremely

long timelines without zooming out

giving them a finer degree of control

and it's not even just for creators but

office work would also be a great option

for someone like a programmer stock

trader or really anyone who needs a ton

of side-by-side screen real estate

because it's basically exactly the same

as having to 2560 by 1440 monitors side

by side except that you have no bezel in

between LG's also been hard at work on

software that allows you to take two

inputs select your desktop in your

laptop and seamlessly share your mouse

and keyboard between them just like

moving between them so you can control

two systems at once

it's got full support for USB type-c

including power delivery so you can use

it as a single cable docking solution

for your laptop and it's got support for

HDR 10 with

- ten watt speakers built-in in fact it

was didn't realize they were gonna be

that loud that happened that happened a

couple times during the video so check

it out at the link in the video

description and I guess that's pretty

much it thanks for watching you guys if

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