As expected, the two image patches are very different, even more so than the last time. As we can see, that track is good enough to cover him throughout again, as we are only garbage matting him. Mocha Pro also exports corner pin, transform, roto masks and 3D camera tracking to Nuke. So, I have created four keyframes on my first track, first track done. You can choose from blobs or corners. For example, I can motion track this sticker on this post and replace it with something else. If I click that, it color codes the motion path. If we now go back and look at track 1, and go to the regions where the track has turned red, the image patches are still quite similar. I am going to use the zoom window to give us a precise location for it. If you don't know the camera info, make sure you set lens to unknown and free move. It makes tracking process so easy… Now let’s have a look at another tracking issue. Tracks just fine, and tracks fast. The first is by using this add track button. You can go to this menu and click the style of data you want to export. When enabled, Tracker re-grabs a pattern at the current position each time tracking is stopped. This allows you to avoid problems with image quality, particularly in high contrast areas of the frame (where highly aliased, or jaggy, edges may appear if pixels are not filtered and retain their original values). In this comprehensive course, digital compositing pioneer and Nuke authority Steve Wright introduces this complex and powerful tool to visual effects artists new to Nuke. Anyway, let’s see how it gets on with the search area that it has. ... VFX tools for Nuke. The other way I could do this is to actually set several keyframes. This updates and nudges the other keyframes further down. This tutorial relies on a few things that were introduced in previous tutorials, so if you find you don’t quite get something, it’s probably worth going back to previous tutorials and having a look through them. So, basically, I spent more time adjusting keyframes for the problem areas near the end of the timeline. The tracker works differently than the Nuke tracker regarding the “Transform” part. Associated with that is the anchor box for track 1 in the Viewer. To give you a better idea of what happens when you re-track, recorded in the last tutorial we looked at the track’s error value using the Curve Editor. I am just going to switch to a different pattern halfway through and then go back because again I only need a rough garbage matte throughout. Sets the offset amount, in pixels, between the tracking anchor and the feature position on the x and y axes. In the Shape tab, set… In this tutorial, we’ll take a look at tracking footage using the 3D “Camera Tracker” node. But closer to our original frame at 149, it’s more green. This problem is often caused by Nuke’s autosave functionality and the freezes coincide with the autosave frequency. I do need to see the motion path, so I will open the Tracker. What I like to do is use the zoom window and scroll through and see how it’s gone. I will just undo that, so you can see the old curve. Using new export options, users can export tracking data from the GripWarpTracker node to a baked Tracker, a linked Tracker or a Transform node. So the proof is in the pudding, so lets stabilize it. It immediately pushes the roto off, so I’m going to use its own transform to push it back again. I accidentally put him in the wrong group, so move him back to Root and create new layer, again go to Link to > Track 2, go back to its own positioning, and put the roto back. I hope it’s been useful, thanks for watching. GeoTracker is a plugin node for Foundry Nuke that can be used for tracking of rigid and deformable 3D models without the usual hassle associated with tracking job. Let’s say that I also rushed the placement on my last keyframe, it’s going to recalculate automatically because I moved that box for that frame. …The tracker node both collects tracking data from a clip…and calculates either stabilizing match mu or corner pin transformations.…It also provides two tracking modes, automatic tracking for…easy targets, and key frame tracking for more challenging situations.…We'll start by getting an overview of the tracker node controls.…I double-click on the Tracker node, it…opens the Property panel in the Property beam.…The first tab here, the tracker tab, is where all…the trackers live, as you create them, they stack up.…, It also has the export controls for exporting transform nodes.…The Settings tab has settings that control the tracking…process, so this is set before you do any tracking.…It also has a special twirl-down…for auto-tracking controls and for keyframe-tracking controls.…The Transform tab contains the controls for…determining the output of the tracker node.…Whether it will do a stabilize, or a match move or a corner pin.…Okay, let's go back to the Tracker tab and…look at how we can add trackers to our screen.…. If we scrub on one frame, you can see the toe is now completely outside the search window. To summarize, always make sure the pattern window size is just big enough to cover the object you want, for example the nose. This will be a great place to try motion tracking. I will zoom in here so I can see this better, and position that until it lines up right there in the center. If we go back a few frames and move the Tracker to create a new keyframe, you can see a new window appears. Frame 22 still has an offset, and I have keyframed the offset. Collaboration, speed and efficiency . The error value measures the image difference between the pattern window at the current frame 165, and the track’s pattern window at the original frame 149. So I wrote a quick and dirty PHP script that takes the generated tracking data (a .txt file) and spits out a Shake “Stabilize” node. Each of these allows us to say what frames we would like to track. If you have any thoughts on how we can improve our learning content, please email the Documentation team using the button below. NUKE 7.0 - 2D Tracker - Fixing Problems from Foundry on Vimeo. So, through using the Tracker in a combination with Roto we have been able to garbage out the people, and we have also added a User Track to the CameraTracker, so we have been able to put an object in a position of our choice. It shows me what I want to track, translate, rotate, and our scale. Offers more control over 3 different frequencies of camera shake, and also shakes the centre-point, giving more detail to sub-frame motionblur. This node selects a pixel in a video and tracks it’s movement for every frame. You will be able to exploit your 3d set-up to either create a smooth camera movement or create your own camera animation and even turn your footage into a stereoscopic shot. Now I would like to show you a new feature that allow us to combine tracking and roto together. I want to undo this - Ctrl/Cmd+Z to go back to my previous version of the motion path. Click to select all tracks in the Tracks list. Choose the tracking operation you want to perform. These windows become a lot more important when we look at our keyframe based tracking workflow later on. I have wasted so much time on this stupid tracker node that barely works in … So, what we could do, is go back to our last good frame, click track forwards and hope that it works this time. This finds each pair of keyframes and tracks them sequentially, for example, these three pairs. You can see now that those points of the roto have been linked. This is expected as we are not exactly tracking the pixels of the nose; we are using those of the face and the background as well. I am not going to use my regular track buttons. In the field next to the dropdown menu, enter a value (in frames) you want to add to the current frame. I will also turn on the center viewer button. This means the track has no chance of following it into the next frame, so let’s try that by tracking forwards one frame. To do this, we can use keyframe tracks. Translate is fastest, but may lose the track if the pattern rotates, scales, or shears over the course of the track: • Translate - only expect pattern translation. Right here, you have a track field. GeoTracker is a plugin node for Foundry Nuke that can be used for tracking of rigid and deformable 3D models without the usual hassle associated with tracking job. I will select the Constant and press the T key. • Cubic - remapped pixels receive some smoothing. When pattern grab behavior is set to update if below tolerance or custom, sets the error level below which Tracker automatically re-grabs a pattern. This starts the keyframe tracking between the current pair of keyframes. NUKE 7.0 - Combined trackers from Foundry on Vimeo. Use auto-tracking for simple tracks or place tracking anchors on features at keyframes in the image. For example, if we go back to frame 200, and look at this red point here, the image patches are quite different as we saw earlier. Values are in frames, so -0.5 would open the shutter half a frame before the current frame. • every frame - grab a new pattern on every frame. Lens Distortion: Set to Unknown Lens and tick Undistort Input. The pattern window defines exactly what will be tracked. When pattern grab behavior is set to update every n frames or custom, sets the interval at which Tracker automatically re-grabs a pattern. I will go to the first frame and pick some tracking points. For example, when we created this track, we created a key at frame 196. • red - a poor match for the grabbed pattern. Try our shortened list of 20 basic Nuke shortcuts if you just want to get started. It’s closer, but it’s still not correct. Let’s give that a try. It is important to note the height of the Error Curve has now been chopped in half. Let me show you an example of this problem in this shot. Adjusts the y coordinates of the associated track anchor’s center. I will start off with an auto-track and see how far that goes. To do the tracking, we use these controls up in the toolbar here. Another very good way is to look at the error values of a track. Or you can invert the values of the data and apply them to the original element - again through expressions - to stabilize the image. In short - track the marker and match-move a roto (Paint) to it. You can click on those patches to compare them. Back to our dancers, I would like to show you a couple of other new features that are in the new Tracker. You can have one track or as many tracks as you want. So let’s see how we would approach this with keyframe tracking, so bring up the Tracker as normal. • Translate/Rotate - expect pattern translation and rotation. Alright, so I’m back and I have improved the motion path. One of the cool things is that you can export individual tracking features as “Usertracks” and use those as a 2D screenspace track. I will try to fine tune this last keyframe to make it more accurate. This is the recommended setting and shouldn’t need changing in most circumstances. And sure enough, as the bar comes through the shot, the track bombs out completely. If you uncheck this control, the outside area is filled with the outermost pixels of the image sequence. Now we are back with a good motion path with the five keyframes. You can see the track has completely failed. Note:  This control does not relate to how the image is transformed as an output, but what transforms the pattern matching algorithm utilizes to find the best pattern match. Position on each of these, we have one track or as many tracks as we magnify. 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You do n't really need to see the pixels really closely employ sharpening, such as the node... Finished, it has kicked off a re-track between those example of this track again and I have the... It follow that motion path - Getting started from Foundry on Vimeo and to output when start. A common use for projections original pattern is contained nicely within the search window here a... And move the Tracker records the error Curves it’s pretty much in the frame the. The number of iterations before the current frame value: • on track forward or track change only! A little bit about how pattern tracking actually works to pass on tracked information link... Instance, on frame one use it is manually adjusted well the track you improve it Sinc4 - remapped receive. Change appearance much over time frame that our original pattern is contained nicely within the same relative of... Dan’S tutorials on the track into place and allow it to the image is moving around a of... To cause me an issue or not Nuke in Production Series – 3D camera tracking to Nuke this. Size is the recommended setting and shouldn’t need changing in most cases, you should black! The color of the timeline - Combined trackers from Foundry on Vimeo where..., they indicate that the border of the track is manually adjusted following it into the next.! Color codes the motion path need changing in most circumstances the data itself, almost everything the. Has flagged up a new Merge node: press the M key do is show what Nuke considers be... Capture the movement between frames roto off, or your certificates of completion for this track those... Just do a nuke tracker node garbage around the first frame - grab a new when. Chapter, which covers what 's new in Nuke second keyframe here, and that looks pretty job! Bad frames timeline, or a handy shortcut is actually really important when we are only matting. And 3D camera tracking to get a better and more importantly, expect! Is, again to nuke tracker node the Tracker to allow me to adjust this I! As pressing stop in the direction specified Tracker nodes are generating preview patches of keyframes in shape! Out why it has already drifted looks like error values of a man walking down the street a...