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Blender Motion Tracking Tutorial - Room Transformation (Patreon)

Published:
2020-03-24 08:10:36
Edited:
2020-03-24 09:44:05
Imported:
2021-03

Content

Truth be told, I'm weirdly nervous about this one. Like, motion tracking is so dependent on the footage that it's hard to make a one-size-fits-all about it. I did a ton of tests though, so I'm pretty sure it's as good as I can make it.

Right now I'm trying to go through and do my series showing how I did the Dynamo Dream teaser. This one's the nitty gritty, but now that it's out of the way, hopefully the rest'll be a bit more fun :D. 

Oh also, released a realtime version if anyone wants it a little slower paced.

Files

Blender Motion Tracking - Room Transformation!

https://www.patreon.com/IanHubert Realtime Version: https://youtu.be/jhPQ7aykVUc Just trying to work my way through how to create a full digital environment for your indie movie! Here's motion tracking. Modeling Buildings in Blender Lazy Tutorial: https://youtu.be/t_c58ryJ-Sw Also- I motion track, from time to time, but there are people who make it their THING, man- here are a few great resources: Sebastian's Match Track Blend series is basically the de facto tracking series- he gives a great intro here: https://youtu.be/G8b4lmB2t68 Sean's video introduced me to the detect features option: https://www.youtube.com/watch?v=uNU_lXjWtWM And it looks like CGMatter has absolutely everything you ever might want to know in his videos here: https://youtu.be/InIuTtt7W3E

Comments

Anonymous

I feel like you posted this because you knew I was up . 😂

Anonymous

amazing!

Anonymous

Awesome Dude, as always ... Thank you

Anonymous

This tutorial what I needed SO much, right now! Thanks!

Howie Day

Such a fantastic job, seriously

Anonymous

Awesome vid!

Anonymous

and another one!! Awesome work. Really informative. Was about to pick up AE2blend, might not now.

Anonymous

This has some really great detail on how to handle motion tracking. Excellent tutorial.

Anonymous

awesome, thanks!

Anonymous

ooo this was fun. I have to ask from a vfx perspective, do you deal with lens distortion at all or do you prefer to not worry about it? Does blender have a solution for lens distortion/undistorting the footage?

Anonymous

Love it, thank you! I'm learning so much!

Anonymous

This is great, Ian.

Anonymous

Ian ..thanks a million you listened ..is it possible to have the footage so we can try with blender....if this workout i will discontinue with pftrack licence .....thanks again Ian for the real time version.....

Anonymous

I didn't even know Blender had motion tracking until I saw your videos. AND it looks better than the shitty motion tracker in After Effects! I find myself saying this a lot lately, but "I can't believe they give it away FREE"...

Anonymous

Hey man ! Any recommendation on what format/compression to make video textures projected on planes? Mine are slowing down my viewport to 6fps. Bummer. I tried both QuickTime Pro Res 444 with Alpha as well as a TGA sequence.

Anonymous

You're the man Ian. Thank you! Been focusing on building my blender/vfx chops during corona and your videos are immensely helpful!!

Anonymous

i tried a lot with your footage which i edited just the tracking shot ..Max i went too 1.6452 Solve error ...i guess ..i have to try again next time...

IanHubert
>>34164069

Oh! Did you download it from YouTube? That might not be high enough res, for sure! 1.64 isn't bad, though! But yeah I can upload the original clip if you want. :D

IanHubert
>>34156375

Ah! I've been trying to figure out what the best settings are, yeah. For prekeyed stuff, I've been doing the Pro Res 444 (8 bit!)- and it seems like the resolution plays a huge part. I ended up using like 480p for eevee responsiveness, and redirected it to a 4k file for the final export, which made working with the file a lot more enjoyable. Lately I've been making lots of different resolutions of footage depending on what I'm trying to do with it.

IanHubert
>>34154324

I still end up using the AE tracker (and AE2Blend) a lot of the time (although that might change after all the testing I did for this tut :P), but yeah, the ability to get your hands dirty with the tracker and clean things up if you DON'T get a great track is really nice. Also being able to mix the camera track with object tracking is SO cool! Seriously yeah.Still so wild it's free, haha. I'm trying to phase out my reliance on adobe if I can.

Anonymous
>>34164069

i got solve error of 0.6829 with little more tweaking with detect feature with a distance of 60 ......but still there is little slipping and sliding in the start but sit well at the end ....well my first time tracking in blender...thanks in advance Ian....

IanHubert
>>34164069

Ahh! I sent you the link up above, if you want it! With this clip in particular you gotta set the keyframes yourself, otherwise it picks weird ones. It's a particularly difficult clip to be your first! Im impressed!!

Anonymous

Hey dumb beginner question here! In the beginning you set the video as the background which works fine, but how do you make the video appear as the background in the final rendering?

Anonymous

It is mapped as a texture to the inner backplanes of the 3D room. Look in the video description on youtube, there is actually a longer, more detailed version of this video where this is explained. Just realized, also here in the description: https://www.youtube.com/watch?v=jhPQ7aykVUc

IanHubert
>>34224231

AH! Sorry I missed this! Thanks to Strand below for answering! But yeah, in this case, instead of just mapping it as the camera background, I've really been enjoying applying the footage as a video texture onto actual geometry in-scene. Here's an unedited version: https://youtu.be/jhPQ7aykVUc I get into it around 13:20.

IanHubert
>>34120579

MOSTLY I just ignore lens distortion. Unless if it's a really distorted lens, or I'm noticing any slippage, I just try to match the focal length and run with it. That said, yeah! When you click "Setup Tracking Scene", blender sets a realtime undistorted version of the video as the background in the scene (since the viewport can't render distorted geometry (well, cycles can, but not eevee/solid/material view)). Then when you go to export, it's automatically created a node setup in the compositor that applies that distortion to the CG instead, so it matches the footage. It's pretty darn cool.

IanHubert
>>34116068

Ah! AE2Blend is great! I'm still not sure where I'm at between the two. I've been working with the AE tracker so long, and have seen it perform bizarrely successful tracks that it's hard to give it up, but for all those times the track DOESN'T work, and there's just nothing I can do, having a system where you can get in there and start babysitting stuff till it works is really handy. Also having it natively in the 3d program is great, especially if you're combining a camera track with simultaneous object tracks (which- I'm not sure you can do with AE?).

Anonymous

Great video as always. Noob question: how do I render the comp out as a video clip? I seem to be having issues with it only rendering out the CG objects and not the video

Anonymous

Doh, I see you already answered this above :)

IanHubert
>>34303542

Ah yeah!! Did you get it figured out? It's admittedly a really weird technique, but I've been loving doing as much comping in the viewport lately!

Anonymous
>>34303542

I understand the projection method (sort of). But you have thrown me of course with this curve ball. I would like to understand the basic method first. The one thing I do not understand about the normal method, is how to render out my comp of tracked footage and scene. When I render out the animation, I only see the blender objects without my video? Sorry, just starting out. I must be doing something simple wrong.

Anonymous
>>34303542

Most tutorials I watch online about motion tracking video in Blender, only show the information about tracking. But, I can't find a tutorial anywhere that shows you how to render the magic out.

Anonymous

Hi Ian! Amazing video and you made me sign up and be a patreon for the first time! Quick question. I have started to do a practice track and i am getting a 0.05 solve error, which is believe is good! But when I attempt to place an object in the scene it still ends up slightly moving around and by the end of the video is slightly shifted out of position. Is this because the track is not good enough? Im thinking its something to do with perspective? For example ,it looks like its sitting on the table in one frame, but its not in the correct position in 3d space and so once the movement starts it no longer looks to be in that original position (hope my thinking makes sense) :D. Would you be able to give any tips on this. Thank you! Matthew

Anonymous
>>34372504

did you solve for camera f & k1 ? otherwise even though the tracking is good (0.05! wow) the real life distortion isn't being captured. but this was 7days ago so you probably figured out whatever the problem was by now

Anonymous
>>34372504

Hi Dane thanks for the reply! No I have not figured out the problem yet. Thanks for the tip I will go and check my files again to see if im missing the solve for f and k1. Im struggling more with the general blender interface right now. Just one wrong click and the menus or dialog disappear or change and it takes me ages to figure out how to get the correct views back ! :P Just wondering now if this is the best place for communication? Im new to this Patreon thing. Is the discord a better place to chat about this sort of stuff? Thanks Matthew

Anonymous
>>34372504

Looks like f and k1 are being solved for :( So not sure what the next steps would be other than try to reshoot

Anonymous

Advice on how to handle footage with out a floor? Like looking up at builds in the city? Pick the lowest points on the buildings?

Anonymous

Quick question: I'm using log footage from my canon eos R and a7r3, should i just drag and drop the footage to blender or edit in afx/premiere and export exr files to blender? How's your workflow? Do you do the grade first and than export it for blender or you grade it in blender than track? Thanks!

Anonymous

Ciao Ian, compliments! How i can render the 3d composition and the background video toghether? Do you render everything in blender? Do you export a png image sequence and than you compose in AE? Wich workflow is better and allow faster renders? Really love your works! Grazie!

Anonymous

Hey Ian, question, I select a few points on the floor after I had already tracked them and solve and get a decent solve error (0.44), but still I get error: three tracks with bundles are needed to orient the floor. How do I get past this? I feel like I'm doing everything right but maybe the shot is too shacky? Thanks for everything btw, love your patreon

Kai Christensen

This was THE video that got my interest in Blender reinvigorated. Now I'm anxiously waiting for part three of the making a scene series because there are so many possibilities!