mixing 16 and 32 bit exr channels

hey,

i am wondering if it is possible in some way to mix 16 and 32 bit exr channels within nuke.

something like the old shake "bytes".

why i ask:
my rendered files contain a huge amount of channels. but i only need very few of them in 32 bit full float.
so i split my original 32bit renderfile in one 16bit half-float EXR for most of the channels and a 32bit full float for the few ones needed.

if i import thes 2 files in nuke and shuffle the 32bit channels into the 16bit file and save that as a 32bit full float image, the result ist way smaller than the originally rendered 32 bit image from maya.

question: can i somehow do that without reading the image, writing it out, read these in again and write out the final result?

hope you get what i mean 🙂

cheers

alex

tcl for grabbing the second input

Here’s the case , i got a gizmo with multiple inputs, i want to feed a tracker node into the second input of my gizmo. I want to read automatically the track1 data from the tracker node and applied to my gizmo using expression.

Ok, well I can use python single line expr , something like :

Code:

nuke.thisNode().input(1).knob('track1').value(0)


input(1) -> to get data from second input. But …. there’s something wrong with when using this python single expression. That python expression above is working perfectly. But as soon as i use that code , my whole script suddenly become very very slow. It took one second just to click any nodes and another one second to drag the node. When i delete that code, my nuke script is back to normal. Must be a bug … so i want tcl version.

I can use tcl : input.[parameter] , but this ‘input’ keyword only work for the first input not the other input (second input , third input etc). I tried using array index something like input(1) or input[1] but they’re not working.
Can anyone help me with the TCL pls . Or any other option?

Thanx

python for nuke

I want to learn python for nuke…in much detail and at more advanced level..previously i just learned it frm the videos on foundry website but i want to go in further detail..can somebody plz tell me the resources frm where i can learn this..plz help

textured alpha growing.

hi
i want to simulate the blood leak through a cloth , and i did all the coloring and gradings and tracking stuff , but i still want the alpha edge of the blood on the cloth be textured and not just a alpha blurred edge,
any ideas.?! :google:

Viewer Caching, Slow Playback : Bug?

Hi,

I’m having some problems whereby when I hit "L" to preview, it would of course preview render first in the viewer, but when I click on an earlier keyframe to playback, it plays slowly at first and I would have to reclick to an earlier keyframe again to sort of smoothen out the playback. I would have to keep doing this to random places in the timeline to smoothen the playback.

Is this a bug, or is this normal? I am using Nuke 6.0, but a workmate has reported the same thing in Nuke 6.1.

Any thoughts appreciated, and sorry if this issue has been addressed before. Cheers…

Macro tool in fusion

How can I bunch up several tool into one custom tool like we do in fusion which is called macro. But I don’t know how can I do that in nuke.. Please help…

Rotopaint subfolders won’t stay closed

I’m painting alot and using many sub-folders to stay organized. What is annoying, is the folders keep un-folding when ever I paint and reveals this ungodly long list which bugs the crap out of me. Any prefs or ideas to stop this?

This is a minor thing but anything to lessen frustration while painting is worthwhile imo.

Stereoscopic workflow

Hallo, what is the right workflow in Stereo project (with stereo footage) ?
My wild guess is:
degrain
undistort
align
track
compositing
distort(optional)
regrain
am i right? or track going before alignment?

copy the data locally before render? and then delete?

my network latency is not making use of local cpu usage to its maximum extent so is there anyway where the read nodes copies the data to temp and then renders the frames and after that deletes the temp…? any possibility of this thing…

Final Cut to Nuke XML workflow (python script)

Hello folks,

I want to share this video with you:

http://vimeo.com/25720019

As you can see we developed a python script to conform xml files from fcp and premiere in nuke. (other programs which generate xml files should work aswell, though not tested)

If you have questions feel free to ask.

We hope to release as soon as possible.

cheers,

jaden