Some things that may help you understand Nuke:

1) Everything is a node. This is one of the fundamentals of node-based 
compositing. There is no "import video" option or "media library" or "<insert 
your favorite name for a central media location here>." Image files are read in 
and written out via the Read and Write nodes, respectively.

2) Nuke makes heavy use of disk I/O, since its image caching mechanism is 
disk-based. When you view a node, its output is calculated and cached to disk. 
The next time you view that same node on the same frame and the state of the 
node tree is the same as it was when the image was cached, the cache will be 
used instead of a recalculation. Therefore, when playing back a comp, you 
typically need to let it play through once to get everything rendered and 
cached, after which it should play back smoothly. You can also use the bundled 
copy of Framecycler or connect to another RAM-based player (DJV, RV, PDPlayer, 
etc.) if you wish to use RAM-cached playback.

The takeaway from this is that you can have all the CPU power and RAM in the 
world, but if you’re trying to work with 2k or HD footage off of a single 7,200 
rpm spinning metal disk, don’t be surprised if you get 4 fps playback speed.

3) Video files are not good. For the most part, they suffer from huge 
random-access overhead; in other words, asking for a frame at random will be 
slow. Since Nuke is a frame-based application, this doesn’t work out very well. 
Try to use image sequences instead.

4) Watch some tutorial videos and spend some more time with it. There’s a 
reason Nuke is the industry standard, and it will start to make sense 
eventually. Many of the same things that make After Effects great for motion 
graphics and quick slap-comp work make it comparably terrible for serious shot 
compositing.

5) When all of the documentation and tutorials can’t help you make sense of 
something, ask questions.

Good luck.

-Nathan



From: kezly87 
Sent: Friday, September 02, 2011 1:16 PM
To: [email protected] 
Subject: [Nuke-users] Is there something I've just completely missed?

Good day all!
Before I start this topic (also my first), I wish to make it clear that I am 
not ranting, or trolling, or moaning for the sake of it, I'm a brand-new user 
to Nuke, and I just don't get it.

I'm looking to hopefully get into the FX industry one day, and have noted that 
a lot of advertised jobs say "must have experience with Nuke", so I downloaded 
the personal learning edition of Nuke yesterday, and have spent a whole 
30minutes on it so far (I do intend to spend more), and it just seems 
long-winded and tedious so far.
I've been using After Effects for my digital work for about 5 years now, and 
obviously I'm going to be biased towards that as it's what I know and 
understand, so I will give you an example of what I found rather frustrating 
about my first experience in Nuke.

Scenario 1: Take footage, desaturate it, and play it back.

After Effects: Import footage, drag and drop 'black and white' fx on top, hit 
render button.

Nuke: Import footage (I couldnt figure out how to do this. I found 'import 
script', 'import image', 'Import project', but no 'import video'. So I just 
ended up dragging and dropping a file in from windows explorer). > Drag on 
saturation node > connect footage output to node input, connect node output to 
viewer input > desaturate > attempt to play back, but video is fuzzy and plays 
about 4fps with no sound.

It's not the computer (before anybody suggest my machine isn't powerful 
enuogh), it's a 4.3Ghz i7 with 2gb Nvidia quadro semi-pro graphics card and 
16bg of Ram.

So what am I missing here? If Nuke is an industry standard program, why (in my 
opinion) is it so long winded?

Like I mentioned before, I'm very interested in developing my skills in this, I 
just wanted to question it first.

Nice to meet everybody!
Kez


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