3D Camera Tracking | NUKE FOR NOOBS!

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[@OfficiallyOToole]

I think a big misstep a lot of VFX artists make is thinking the more tracking markers there are, the better the track result will be. This is only partially true. The number of tracking markers there are only has little to do with the solve error. Yes, put a heap of tracking markers at the start and so there will be a better chance of getting a bunch of solid tracks, but after that, delete all the not as solid tracking markers that are driving up your solve error. Blender only needs 8 tracking markers to make a track. So place a lot of tracking markers in the shot, and delete all but the few with the best results that you actually need. In the end, you only actually need the base amount you need to keep a track. Now yes, having a lot will help you place a floor, walls etc. and so I don't suggest actually doing that, but I was just mentioning that you don't (in the end) need heaps of tracking markers. P.S. Please don't take this as me bashing you in any way Alfie. I really enjoy your channel and have learned a lot from you! It's just that I used to think differently and when you actually think about it, you don't need your scene filled with tracking markers.

[@AlfieVaughan]

That's not entirely true but I know what you mean. There's more to it than just the number of trackers. Also blender and nukes tracking is a bit different so i don't know if the minimum of 8 really applies. For example, a solve error of 0.1 with 10 trackers will probably be much worse than a solve error of 0.4 with 500 trackers. Even though the overall error is higher, the computer has a better understanding of the scene in general. So it really depends on more than just how many you have

[@mydreamcinemas]

Softwares that I use, blender, Ae and mocha.. after this series, may be I will add Nuke to the list..😁

[@aamg1992]

I wish all the tutorials were like yours, without extending, just to the point without much preamble, just the facts and that's it.

[@AlfieVaughan]

Thank you! Glad you liked it :)

[@manoojmanoharan9854]

The very best basic Camera tracker tutorial!

[@AlfieVaughan]

Thanks!

[@leic8942]

Great tutorial! But I wonder if you need to add the distortion back on top (to the patches) before merging to the mainstream since you tracked on the undistorted plate.

[@AlfieVaughan]

Technically it's probably best to do the paint on the undistorted plate and then redistort. But in this case I tracked the undistorted plate but then did the paint work for the patches on the source plate so there's not really any need to redistort the patches

[@firedgaming4036]

Brilliant as always! By the way could you please make a tutorial on blender motion tracking in 2.93?

[@AlfieVaughan]

Thanks! I've done a few videos with motion tracking in even though it wasn't specifically the topic. Check out the Thor video's breakdown and tutorial

[@firedgaming4036]

@@AlfieVaughan OK and don't forget to shout out me in the next vide ;)

[@AlfieVaughan]

Why? 😂

[@pakistandams1]

Amazing Tutorial

[@AlfieVaughan]

Thanks!

[@mattferris3767]

DO NOT forget to check the project settings to the size of your footage! By default it’s 2k

[@AlfieVaughan]

I have a little bit of code in my menu.py that defaults my nuke scripts to start in HD 😉

[@uberjava]

You did a tutorial on a round trip from Nuke NC to Blender and back, with the tracking in Blender. Would you envisage doing the track in Nuke (non NC) and then shifting that to blender? Or does blender work best with it's own tracked scenes? And totally off topic, reflecting HDRIs in Nuke. Let's say you added a card and wanted it to be a window etc. I haven't seen any tutorial on that yet that seemed to give me the answers... ta geez.

[@AlfieVaughan]

Unfortunately you can't export tracks from nuke NC to blender as the writeGeo node doesn't work. I use nuke indie so I do about half my tracking in blender half in nuke depending on the complexity of the shot. In nuke there's a reflection node and then you when you plug it into the renderman render node you can see proper reflections from that surface. That would do what you're after. Not entirely sure if its disabled in non commercial or not though...

[@karimsayed2097]

Great tutorial as usual but we need more prep and compositing tutorials for compositors if you can do it

[@AlfieVaughan]

Thanks! Anything specific you'd be interested in? Would be good to get some suggestions from people watching these videos

[@karimsayed2097]

@Alfie Vaughan I believe keying video specially for hair detailed keying... then you can do a full 2d compositing shoot like those in movies... also screen or sky replacement...then would be nice to do a general video on the most used effects/gizmos for compositing in nuke

[@AlfieVaughan]

Got it! I'll have a think. Thank you!

[@mjparent222]

i am not sure to understand something. You have undistort your image for extracting your camera. but under you scanline you don't put back the distortion ? before merging ?

[@AlfieVaughan]

Technically you should. But I didn't project the undistorted plate so the cleanup patch already had distortion

[@3lukemoore]

Is it possible to export the nuke tracks into maya as a mesh then add a effect or it key frame the animation then add it back into nuke?

[@AlfieVaughan]

You can use the write geo node to export all the 3D stuff as an alembic and take it into another software

[@3lukemoore]

​@@AlfieVaughan if you watch this video in the link , you'll see two clips one of a bridge and a river then It cuts to a clip of Maya, I'm trying to get the mesh from the clip in Maya on to the big part of green grass in the first clip through nuke x is this possible thought alembic exportation.

[@AlexisRivera3D]

Can you export the tracking information to Blender??

[@AlfieVaughan]

Yes but not in Nuke Non Commercial. The ability to export cameras and geometry is only available in the fully licensed versions

[@AlexisRivera3D]

Damn Nuke is so damn expensive for freelancers like me I can not afford 500 usd/year@@AlfieVaughan

[@NOTMYSCENE]

*10th like,Nice tutorials master □*

[@AlfieVaughan]

Thank you :)

[@ronydey2696]

Superb mostly needed tut's sir Hi there myself Rony a VFX CG student from India

[@AlfieVaughan]

Glad you liked it!

[@ronydey2696]

@@AlfieVaughan please if possible how to skull composting in any face and head track in NUKE and Maya sir

[@nikhilbhojne6395]

Can you explain me how to connect multiple shapekey to single controller

[@AlfieVaughan]

You just have to add a different driver to each shape key but set the object to be the same controller. Then when you move it they all move

[@nikhilbhojne6395]

@@AlfieVaughan could you please guide me with any tutorial

[@AlfieVaughan]

I never found any tutorials on it annoyingly. It took ages to figure out. I just figured it out on my own

[@nikhilbhojne6395]

@@AlfieVaughan okay I will try to figure it

[@kyladelacruz1915]

hello, i exported my video, the photo stuck to the wall, but as i watched it i noticed it kinda glides along with the camera a bit? like its not completely stuck on the wall if that makes sense

[@AlfieVaughan]

Sounds like your geo for the wall might not be in quite the right spot in 3D. Make sure you create the card based on where the points of the wall are in the pointcloud so you know your scene has the correct depth

[@haziqgiri3650]

Can i know how to export 3d camera tracking from nuke to 3dsmax?

[@AlfieVaughan]

You use a write geo node :) but you can't do it in non-commercial. Exporting cameras is limited. But if you have nuke indie or the full license then you can

[@haziqgiri3650]

@@AlfieVaughan Thanks ☺️

[@Beergodda]

How can i render overscanned images from Blender to further distort in Nuke?

[@AlfieVaughan]

There's an add-on called overscan for blender that lets you change the cameras's FOV to render overscan

[@Beergodda]

@@AlfieVaughan Thank you for sharing your knowledge with us

[@prasenjeetbanerjee2867]

Can I Export the camera track from nuke to blender ??

[@AlfieVaughan]

Not using nuke non commercial but you can in nuke indie or the full version using the writeGeo node. There is a .Chan file you can export than can be transferred to blender but I've found it's a bit hit and miss

[@christyka1407]

Bro after open in maya the track points and camera are not in proper position its look like 45% slanting position how to correct it😢😢😢😢😢😢😢

[@AlfieVaughan]

I'm not sure, sorry. I don't use Maya. You can probably just rotate the whole scene to correct for it but it sounds like you either imported or exported it wrong

[@sundaravel8427]

how did you made line that edges... can you explain me that way please....2.13 while

[@AlfieVaughan]

You click to add the cross then right click to complete the line

[@TakeWhatsyours]

@@AlfieVaughan If i click nothing happens, could it be because i'm using non commercial?

[@AlfieVaughan]

No it works in any. Not sure why yours is having problems

[@TakeWhatsyours]

@@AlfieVaughan Now is working lol, thanks anyway

[@jairuspereira]

hey Alfie, Im not able to find this videos files on your patreon is still on it?

[@AlfieVaughan]

Hey. I have never been able to upload the video files to Patreon sadly because they have an upload limit that is too small for the footage. I'm trying to find ways around it for the future

[@landonspicer904]

@@AlfieVaughan I subscribed because you said I could grab the asset, it's only a dollar but it I had to sign in to things

[@AlfieVaughan]

What do you mean??

[@deep8673]

hi, i can't find the lens distortion node, nukex, theres a node names " LensDistortion ( Undistort), but can't find the specific node

[@AlfieVaughan]

It's a legacy node that's been replaced in more recent versions. To access it you have to press X and then search the legacy nodes for "LensDistortion" and then press enter. It's case and space sensitive so make sure you type it correctly. Then it should work 👍

[@deep8673]

@@AlfieVaughan thank you so much, really means a lot of you to reply to each one of us and help us out, really grateful .. btw, i have been trying to subscribe to your Patreon from a day or two ... the payment is getting declined, figured out patreon has a problem with Indian Banking Rules and thus people from india can't subscribe to your patreon ... it would be great if you could somehow figure out a solution or upload your project files to any other platforms such as gumroad ... you can price each project file or asset pack for a particular video for 1$, and we will be happy to pay that or more

[@deep8673]

@@AlfieVaughan hey thank you so much, it means a lot of you to reply to each one of us and help us out, i am now feeling a bit silly on my end after i just figured out, that you already mentioned this inside the video ... also, btw, i have been trying to subscribe to your patreon from a day or two, but the payment was getting declined. then i figured out that patreon has some issues with the Indian Banking System and thus people from india are facing issues to use patreon ... it would be great if you could figure out something or release your project files for each video on gumroad individually and price them each for 1$, we will be happy to pay that or more, we genuinely appreciate your efforts and many of my friends from our VFX institute here follow your content as we all agree, its one of the highest quality and value

[@AlfieVaughan]

Glad to help! Yes a lot of people have had issues with Patreon from India. The gumroad suggestion is a good idea. I'll look into it 👍

[@deep8673]

@@AlfieVaughan thank you so much ✨

[@syam.k.yenubari]

What about exporting to blender..

[@AlfieVaughan]

You can't really export cameras from nuke non commercial. I just track in Blender. Nuke Indie and the full version can do it though

[@syam.k.yenubari]

@@AlfieVaughan you mean nuke indie ? What about alembic or fbx exporting ..

[@AlfieVaughan]

Sorry yes haha. Auto correct. You can't export geometry from non commercial in any format because the writeGeo node is disabled

[@kg4135]

What do we do when there are no reference points to set the ground plane, I've been trying for days to get it right but failing. I'm really frustrated. Please Help!

[@AlfieVaughan]

Just track what you can see and manually align it where you think the ground is once you've got a good solve :)

[@kg4135]

@@AlfieVaughan Already doing that but still result is not accurate

[@AlfieVaughan]

Then I'd imagine either your solve isn't very good or you haven't aligned it correctly. Maybe just try starting again. It's difficult for me to diagnose without seeing it

[@kg4135]

@@AlfieVaughan Solve error was 0.3 overall & yeah setting up the grid correctly is hit and trial. Btw where do I send you the file if maybe you can look into it?

[@AlfieVaughan]

Maybe join the discord and put it in there. Someone will be able to help but it probably won't be me. I get asked to look at project files that aren't working all the time and I just don't have time to do them all 😅

[@3zi3x]

can't add video to playlist, please fix it)

[@AlfieVaughan]

That's not something Ive done. I don't know why it doesn't work. Sorry

[@3zi3x]

now its work, tnk)@@AlfieVaughan

[@faisalahmadkhan1181]

SIR, I asked a question from you on instagram and you didn't gave me reply. Sir its really important plz check it.

[@AlfieVaughan]

All you did was send me a photo. What do you want me to do with that? 😅

[@faisalahmadkhan1181]

​@@AlfieVaughan SIR! When ever i Rig a 3D model the Leg are always move in Wrong Direction. So How can i fix that.

[@AlfieVaughan]

Looks like you're using rigify? I don't know maybe try applying all scale and positions etc before parenting. I don't really use rigify

[@dyfx9788]

@@faisalahmadkhan1181 lmao calm tf down

[@3lukemoore]

keep getting read1: /path of video file ---- error message

[@AlfieVaughan]

I try to avoid using video files in nuke. Convert to an image sequence. It's much more supported and plays better

[@3lukemoore]

@@AlfieVaughan but isn’t that what nuke is best known for video editing?

[@3lukemoore]

@@AlfieVaughan how would I do this? It’s currently a .mov

[@AlfieVaughan]

Definitely not video editing 😂 compositing yes. But editing and composting are very different

[@3lukemoore]

@@AlfieVaughan ok so got it working! all good except now when I go to the 3d view its completely blank but everything is showing up correctly on the 2d viewer and I have the ground plate etc