Apr 29

latlong problem – output from 3d scene

Posted in: NUKE from The Foundry
Hi, i attach the scene file, there’re 2 identical flow to create a latlong, one using spherical transform node and other using 3dscene. I found some imperfection from the output of the 3d scene. If you compare the output of the two, you can see at the bootom and top , there’s a bit of black area also the bad thing is the quality is dropped near the bottom/top , i can see the jaggies. Does anyone know about this imperfection ? Do i miss something ? try to increase the overscan param but no luck…. so anyone know how to fix this?

Thanx

Attached Files
File Type: nk latlong error.nk (13.2 KB)
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Apr 29

Nuke Camera Tracker Solve Questions

Posted in: NUKE from The Foundry
I’m trying to camera track a roof with an actor hanging on wires. This is a wire removal job basically.
First I created a holdout roto for the actor and the wire masking of the moving objects. Then I used the camera tracker and tracked the background of the shot, which is the roof. I solved the camera and got a RMS error of less then 0.8 Pixels. Now since the roof isn’t straight I don’t know how to setup the ground plane. My main problem is to setup the correct coordinate system so that I can place a card correctly in the scene. I tried to select tracking points and define z and x axes. When I did this, I always switched between 3D and 2D view in the viewer in order to find two points that I thought might be correct in 3D space giving me either the x or z axis. So as I’m looking for two points I found out that the tracking points that are closer to the camera in the 2D viewer are the furthest away in the 3D viewer?! And viceversa: points that are far away from the camera in the 2D viewer are close to the camera in 3D view mode. Does anyobody now what I’m doing wrong? Maybe someone can enlighten me…

Thanks in advance for any help, I really appreciate it!
smarty

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Apr 29

Indication for approaching a compositing trouble? please

Posted in: NUKE from The Foundry
Hi evereybody! =0)

i’m new bie in compositing and nuke.

I have 2 video merged with thi node as in nodes_holo.png (attached to this post)
the result is crop.mov (attached to this post)

the final result is this in my other post here
here the video http://www.youtube.com/watch?v=hJi_q4ZJaAE

PROBLEM: the camera has the same "fixed position" for both the 2 video. but for the second there was different "light"…

i need to indicate "HOW CAN I APPROACH?" this problem… suggestions for the nodes that i have to involving????

Attached Thumbnails

Click image for larger version Name: nodes_holo.png Views: N/A Size: 23.3 KB ID: 11722
 

Attached Files
File Type: mov crop.mov (325.7 KB)
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Apr 29

create cam from current viewer

Posted in: NUKE from The Foundry
Hi, is there any way i can create new camera based on current perspective view ? if it’s not a single click , maybe by copying/pasting ? can i get current setting for current perspective ? focal length and transformation ? so i can use this data to be pasted to new camera.

thanx

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Apr 28

Expression question switch/read node

Posted in: NUKE from The Foundry
I am trying to a switch node to be: 1 whilst (framerange = 0-24 AND 250-274 AND 500-524 AND 750-724 [and so on…] ) ELSE 0

this is the expression I think, where n = 0,1,2,3….

0>frame<((250n-1)+25) ? 1:0

how do I write the expression for this?

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Apr 28

is this possible ?

Posted in: NUKE from The Foundry
a few years back I wrote a small dos program that reads a wave file and passes the data to a fft algorithm it then outputs data to a text file. I then wrote a small plugin using Max Script to read this data to animate a set of objects in 3d studio max.

so I would like to use this same program to do the same sort of thing in nukex .

so can I get nukex to read data from a text file and set a load of keyframes ?

Thanks for reading guys

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Apr 28

faking handheld like cloverfield

Posted in: NUKE from The Foundry
Hi all,
I just received a project that requires all locked down shots to look hand held.
The Director told me he wants some shots that can be subtle to shaky footage like Cloverfied. He also ‘STRESSED" that it must look EXTREMELY REAL.
Paralax is a MUST.
Otherwise he will hand off the work to another VFX Artist.
I have never done this before and My exact works to the Director was…"I’ve done it a thousand times, you’ll love it! " 🙂

So I have 1 month to learn and get into shape before I submit my Demo.

So, I need you guys more than ever. I understand the "theory" behind it, but my shaky footage in the past was a Wiggle expression.

Please don’t read this and move on.
If you have ANY suggestions that might help me, PLEASE post it.

Thank you

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Apr 28

import p2 files mxf in nuke..

Posted in: NUKE from The Foundry
hi friends.
in a company where i work have a panasonic p2 300 Hd, this cam recorder in mxf files, we converted this files in targa secuences for can work, but i want to know if is posible work with native files mxf in nuke..
i search in internet but i didn’t find nothing…

thank for yours comments

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Apr 28

How to restrict one knob to only affect a given area?

Posted in: NUKE from The Foundry
Hello all. Does anybody know how to restrict a ‘knob’ in a given area, such as an area drawn in a ‘rotopaint’?
With ‘Keylight’, for example, I want to adjust ‘Clip White’ knob to affect area A and ‘Clip Black’ to affect area B. I think one solution might be using two ‘Keylight’ nodes, adjust each knob in each node, and draw mask A\B with ‘rotopaint’ node separately. Then combine the results.
But that needs too many nodes. So, can it be done within one ‘Keylight’ node? Can it be done with expressions?
Any technique that can be achieved is welcomed:).

Thank you.

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Apr 28

may to nuke up vector

Posted in: NUKE from The Foundry
Hej,

i have some problem with the conversation from maya to nuke. Actualy i needed to change the up axis in maya to z but when i export my animated camera, now to nuke of course it doesn´t work, because nuke does use y as up axis.

maybe i am just blind, but is there a way to change the up axis in nuke to z instead of y?

thanks for your help

sebastian

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