Become a Certified CAD Designer with SOLIDWORKS, Become a Civil Engineering CAD Technician, Become an Industrial Design CAD Technician, Become a Windows System Administrator (Server 2012 R2), Navigating the timeline, nodes, and Curve Editor. Basically, in Nuke they can only output a CornerPin with exactly 4 points, and they map 1 track to each corner of the CornerPin. As the name suggests, this centers the viewer around all of the selected tracks. The view of the patch is put into the zoom window, so it’s a great way to make sure your positioning is accurate. Skip back and forth to ensure we have the same position on each of the keyframes. I am going to create another keyframe, right on the last frame of the occlusion. And now that new Constant follows where that sticker was. • if error above - use the when error > control to specify the grab behavior. Sets the magnification in the zoom window. As soon as you don’t require the offset, use the clear offset button to get rid of it. Tracking nodes generate a lot of data causing the file size of scripts to grow very large. So, I’m going to do just that and skip on another 25 frames. So now we have keyframes either side of that occlusion. This will be covered in a later tutorial. This starts the keyframe tracking between the current pair of keyframes. It can make track positioning more difficult, however. • add jitter - transform the input image by the high-frequency components of the track to increase the shake or add it to another image. You do this incrementally, so every time you touch the track you improve it. Keyframe preview task messages can also appear when performing other tasks like rendering, and cause a significant slow down. You are now leaving Lynda.com and will be automatically redirected to LinkedIn Learning to access your learning content. Instead of using the normal tracking button, I will use this new button, key track all (Shift+V). However, you may want to turn this off for camera shake, or if you want to texture-map or intersect the output with a similar shape. Now the shot is stabilized, we can see how bad the rolling shutter is, so it’s possible we could have sent this shot through correction before working on it. The idea behind keyframe tracking is to lay down keyframes and let the Tracker figure out what happens in between them. CameraTracker (NukeX and Nuke Studio only) is designed to provide an integrated camera … You can always go ahead and add some more keyframes, for example, I will go to frame 200. Multiple suggestions found. The outer box is the search box. Let’s give that a try. To see this, we can toggle this new switch called the show error on track button. You can see around the orange and red dots, the track has really drifted. On top of that, it will help you get the hang of the new keyframe-based tracking workflow that we will present in the next tutorial. So just close this track for the moment, and just look at the Roto. If we go back a few frames and move the Tracker to create a new keyframe, you can see a new window appears. For example, at our high peak you can see the values are red, and on our original peak at frame 165, you can see it’s more orange. This allows us to get a good picture of where the track currently is in the frame, and also to position it. For example, if we want to track to the start or the end of the shot we can use the Z or V keys, or if we want to track backwards or forwards one frame we can use the X or C keys. You will need about 10 hours … Once I have a few keyframes, I can then analyze. Being able to spot when and why a track has failed is extremely useful and will save you a lot of time in the future. This will help make sure the resulting motion path is more accurate. Create timeline effects and flip them into the node graph, or edit and render compositions right from the timeline. NUKE 7.0 - Keyframe Tracking Around Occlusions from Foundry on Vimeo. The inner box is the pattern box, that’s the pattern you are trying to track over time. When enabled, scale is calculated during tracking. In this example, I would like to track the girl’s nose. 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. Sets the maximum number of tracks with keyframes that can be displayed in the Viewer. One suggestion found. Select the filtering algorithm to use when remapping pixels from their original positions to new positions. We head down to a bit further down this shot, create another keyframe, again to help the Tracker. Watch this video on our Vimeo channel . So, you can see if we skip on one frame that our original pattern is contained nicely within the search window here. Instantly, if we look at our zoom window, we can see we have a much better lock on the tip of the nose. When enabled, create a new keyframe when the track is manually adjusted. When I am happy, I can select all of the tracks, and the new average tracks button will combine all of the tracks into one keyframed track. In the Shape tab, set… Explore. I made one already and it’s called square75, and it’s 75x75 pixels. I will set up 5 keyframes for this example. • Affine - expect straight lines and the distance between the points on them to remain equal. I will click the add track button; the track listed here is track 1. Use up and down keys to navigate. Turn off the tracker node preview. This has proved an invaluable tool for me, as Im often working at places that don’t have the full licence for Mocha. We can also use the Shift key to toggle on or off this add track button. Start your free month on LinkedIn Learning, which now features 100% of Lynda.com courses. Now we are back with a good motion path with the five keyframes. Hi, my name is Dan Ring. We would start off in exactly the same way as we would with normal tracking. You can see the track has completely failed. So now, using the new Enable button I can keyframe when the trackers are on or off, and now they won't bother to track at that point. I will start off with an auto-track and see how far that goes. Thanks for watching. Now you can see tracks within my CameraTracker, but these don’t always remain, so I’m going to use a User Track to isolate this point. For example, let’s do this track again and I will cancel it mid way. These are keyframe patches. This is actually really important when we are tracking. It is even possible to patch areas by connecting the tracker to a corner pin node. The 3D Camera Tracker node in nuke is quite nice, but does have its limitations. Zoom in and move the Tracker to the top circle of the tattoo, and then adjust the pattern window, so it captures most of the top of the tattoo. We will start by loading up the Tracker node. This places a track in the center of the Viewer. Click the Add User Track animation button, then Link to > Track 4. So, congratulations -- we have our first track, and that looks pretty good. For example, a value of - 0.5 would open the shutter half a frame before the current frame. But closer to our original frame at 149, it’s more green. Step 1 Seeding and setting track parameters. • Translate/Rotate - expect pattern translation and rotation. This gives us a snapshot of all the keyframes for this track. So, I will go full screen and we will work in this mode. Once tracking is complete, you can drag-and-drop the rotate information to link other nodes, such as the Stabilize node. This is one of many ways to remove tracker markers in Nuke, using Paint. Initially the Constant is the same size as the project. I will do the same further down, and I go to the end and give it one last keyframe. I will also make the search window larger, so it captures the motion of the arm. An error does not necessarily mean a bad track. • CornerPin2D (use transform ref frame) - creates an expression linked CornerPin2D node that warps the image according to the relative transform, using the frame specified in the Transform tab as a reference. …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.…. 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). The integrated Camera Tracker in NukeX® and Nuke Studio replicates the motion of a 2D camera with an animated 3D camera or point cloud in Nuke's 3D space, allowing you to composite 2D/3D elements accurately with reference to the original camera used for the shot. Frame 19 has been added in the middle there. Sets when filtering is applied to the zoom window: Note:  The filter applied is the same as that selected on the Transform tab, and can produce a more visually stable track. About 90% of all failed tracks can be generally fixed by increasing the search window size to match the amount of motion of the object and also its direction. For the tracking itself, almost everything is the same. It immediately pushes the roto off, so I’m going to use its own transform to push it back again. Alright, so I’m back and I have improved the motion path. I will go to the first frame and pick some tracking points. I could bring in a Read file with a bitmap or, in this case, I will just bring in a Constant to test this (Image > Constant). Let’s give that a try. Now let’s have a look at another tracking issue. Click to set the current frame as the reference or identity frame. Jun 23, 2016 - This is one of many ways to remove tracker markers in Nuke, using Paint. Useful Nukepedia Tools #11 W_hotbox by Wouter Gilsing. Sets the size of keyframe snapshots in the Viewer. The other way I could do this is to actually set several keyframes. This is where you add tracks. Now that we have a point that we can create an object for, right-click on the point and select create > sphere. Create another keyframe, using the zoom window to get a nice and precise lock on the nose. Explore Lynda.com's library of categories, topics, software and learning paths. You can see the keyframe track proceeding forwards in the shot, and although it looks like it’s doing the same thing as the auto-track we showed earlier, it is actually trying to match the current pattern window against both search windows of the keyframes, but also keeping the track position of the two keyframes locked. 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. bm_CurveRemapper. The Tracker has been updated for Nuke 7 and is much more powerful and easier to use. 2d trackers can be helpful to keep Roto shapes in position. CAUSE. This means we can now work full screen for all of our tracking. If you look at the zoom window, you can see it’s pretty much in the right spot. Click to select all tracks in the Tracks list. • Mitchell - remapped pixels receive some smoothing, plus blurring to hide pixelation. So lets go back into the CameraTracker and create a Camera, bring up a Scene, and through this we will be able to check the integrity of this track. Let’s just track to the end of this shot, and if we look in the zoom window, we can see that’s doing a pretty good job. In the Shape tab, set… Explore. NUKE 7.0 - Combined trackers from Foundry on Vimeo. Or we can create lots more of these. This will be a great place to try motion tracking. 8 years ago. We can then jump onto a later frame, for this example I’m going to use frame 128. A simple thing when using a lens grid but there are also other ways like analyzing lines in the … The tracking information can be later used for retouching, adding scars, relighting, face replacement, aging and de-aging, etc. Now I will adjust those two patterns to be as close as I can, and go to frame 22. It’s looking pretty good, however, at the very end, because of the overlap with the arm, it gets confused with 2 frames. In our panel, we now have four trackers. I am just going to do translate for now, but if you want to, you can turn on rotate and scale also. So, consequently I would have to go through the entire lot and adjust them. For the Transform node they may use 1 (translation only), 2, or N points to find the final transformation, however … There are still a few issues, for instance, I would have to rotoscope to get behind this man's arm, but the basic motion tracking is now working. This one is tricky because the man’s arm covers up the sticker. In this tutorial, I am going to go back to basics, and show you how to spot problems with your tracks and figure out what your track is doing. My nearest frames are frame 100 and 128. Notes are saved with you account but can also be exported as plain text, MS Word, PDF, Google Doc, or Evernote. Frame 22 still has an offset, and I have keyframed the offset. If you set this to something other than all or none, you can use the checkboxes on the right to select individual channels. • none - don’t show any keyframe snapshots. When enabled, rotation is calculated during tracking. As we can see, we instantly have a much better track. In short - track the marker and match-move a roto (Paint) to it. Then, we'll track the camera and attempt to make some improvements on the track by using the filters and deleting bad tracks. Now, I can go to a different keyframe, say frame 195, and re-position the box. Each of these allows us to say what frames we would like to track. Range: Global is the range of Project Settings Use Custom if you don’t want to track the entire range. Set this control to 0 to always display selected tracks with keyframes. If we scrub along, you can see instantly how the track is doing. I’m now going to move the tracker to the top section of the tattoo. Keyframe preview task messages can also appear when performing other tasks like rendering, and cause a significant slow down. Exercise Files When the planar tracking data is exported with the Tracker option, it creates a…new Tracker node with the planar track data baked in.…T The four corners of the Ppanar surface become the four tracker points, which you…can then use to match, move, or stabilize images. Another very good way is to look at the error values of a track. Lastly, we'll create a tracked camera from the process which we can use for projections. I will select the Constant and press the T key. Now, we have a nice smooth track. What I like to do is use the zoom window and scroll through and see how it’s gone. Then I can compare the keyframe positions. • every frame - grab a new pattern on every frame. GeoTracker makes tracking tasks much easier, so what usually have been done by a team of motion tracking specialists can be done by one of them and with less time. This creates a new keyframe at frame 113, and then starts re-tracking between our new pairs of keyframes at frames 101 and 113, and 113 and 128. Things really start to get interesting when we start trying to figure out what these high error value peaks correspond to in our image. As we can see, that track is good enough to cover him throughout again, as we are only garbage matting him. In most cases that I have seen when tracks have failed, they can usually be fixed by just increasing the search window size and then re-tracking. If the object doesn’t change appearance much over time, we expect the error to be quite low. Watch this video on our Vimeo … Now I want to check my track. So yellow, to orange, to red indicates a rising error value. When transform is set to add/removejitter, sets the number of frames to average together to get a stable position. For the moment, let’s simplify things and let’s clear all of these tracks and start from the beginning. You see, the track is not quite on the circle of the tattoo, so move the Tracker to where it should be, let go, and allow it to re-track. So, if you are having problems tracking a shot with lots of luminance variations, turn this on and you should be able to get a much better track. I will go ahead and hook that up. • remove jitter - transforms the image so that the tracked points move smoothly, with high-frequencies removed. To show you what I mean, I am going to start a track and pause it halfway through. Let’s create a new track. I will zoom back out. It shows me what I want to track, translate, rotate, and our scale. The node can only be attached once. You can see now that the toe has been correctly found in the next frame. Note:  Enabling black outside also adds a solid alpha covering the input image area if no alpha is present. If we zoom into the bottom left hand corner of the search radical, we can see this magic error value here. These windows become a lot more important when we look at our keyframe based tracking workflow later on. This happens specifically when the Tracker nodes are generating preview patches of keyframes. Values are in frames, so -0.5 would open the shutter half a frame before the current frame. We could also create a CornerPin or Transform stabilize node from the Export menu. It’s closer, but it’s still not correct. Let’s give that a try. Displays the rotation applied to the Transform widget for the current track. Now this can be quite difficult at times because there are a lot of maths and expressions involved, and you may need more than the four tracks then you are offered in Nuke 6.3. Once tracking is complete, you can drag-and-drop the skew information to link other nodes, such as the Stabilize node. We expect this behaviour as most interesting objects change appearance over time, and this error value measures the change in appearance from our grab frame and our current frame. NUKE 7.0 - 2D Tracker Tutorial from Foundry on Vimeo. Are you sure you want to mark all the videos in this course as unwatched? The first thing I can do is figure out why it has gone wrong. If we hold Shift and drag, we can magnify this zoom window even further and really get a much finer position. Displays the translation applied to the Transform widget for the current track. Nuke studio is the no 1 industrial standard compositing software in visual effects.Nuke has been used in many Hollywood movies line Ironman to the 1917. Using expressions, you can apply the data directly to transform and match-move another element. There is also a hide progress button that stops the progress window from popping up when we are tracking. So, moving down now I have a keyframe quite close to the other ones, so just go to the top and remove the keyframe. I am not going to use my regular track buttons. Lanczos4 provides the least sharpening and Sinc4 the most. 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. • none - no transformation is applied to the input image. The nice thing about using the center viewer option is we get to see the rest of the picture as well as the stabilize tracks. Now we have both eyes rotoscoped using the Tracker. The Foundry Visionmongers Limited is registered in England and Wales. New platform. A value of 1 should produce reasonable results for most sequences. In this post I’ve selected some parts on camera tracking from the Nuke User Guide manual and added some pictures and bolded some parts in order to make it easier to remember how to work with this node. 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. Once tracking is complete, you can drag-and-drop the translate information to link other nodes, such as the Stabilize node. Auto Write Node by Lars Wemmje. This is a very similar idea to how rotoscoping works: every time you move a control point or create a new keyframe, you end up with a better overall matte. If you watch the zoom box, you will see the pattern is more stable now. Because a lot of things have changed, we are going to go back to basics on creating new tracks and setting up everything you need to get a good track. I have brought in some footage of a man walking down the street with a moving camera. NUKE 7.0 - 2D Tracker - Fixing Problems from Foundry on Vimeo. Stefan first steps through all the setting you need to know for the camera tracker node. The buttons with the vertical bar and the arrows allow us to track backwards and forwards one frame at a time, and very importantly, the stop button allows us to cancel tracking at any point. (check all that apply). Now that we have a good path, we can export the data. FaceTracker is a plugin node for Foundry Nuke created for facial tracking without mocap rigs and markers. When pattern grab behavior is set to update if above tolerance or custom, sets the error level above which Tracker automatically re-grabs a pattern. This is an extreme example to show that high motion needs large search areas. The first thing you will notice is that we have a panel that allows us to store as many tracks as we want - we are no longer limited to the initial four. 14th Oct 2018 by finleysearlepenwithdigital. • stabilize 1pt - similar to stabilize, but designed for use with a single track. You can see we now have a pair of keyframes. Bring up the Tracker in the same way as we did before, and as you can see already, there are a number of differences. smartMessage | smartLib. • when tracking - only display the zoom window during tracking. Auto Write Node by Lars Wemmje. The problem then is it might not localize the feature you want to track properly. When enabled, tracked patches are clamped to values between 0-1. Starting with an introduction to the unique node-based interface and progressing through techniques like color correction, keying, rotoscoping, and tracking, this course covers Nuke from top to bottom. Back to our dancers, I would like to show you a couple of other new features that are in the new Tracker. This creates our first new keyframe. Before going to keyframe tracking, I would just like to approach this the normal way. The integrated Camera Tracker in NukeX® and Nuke Studio replicates the motion of a 2D camera with an animated 3D camera or point cloud in Nuke's 3D space, allowing you to composite 2D/3D elements accurately with reference to the original camera used for the shot. Author Steve Wright covers the introduction of 3D particles, the enhanced spline and grid warping, the all-new planar tracker, an audio scratch track for matching audio cues to effects, and a briefing on … • Parzen - remapped pixels receive the greatest smoothing of all filters. By doing this, we create a new keyframe. So I go back into the Tracker, and select track 1 and 2, right-click, and set Interpolation > Before/Linear and now those points carry on based on the extrapolation of the curve, and as you see, my Roto has continued onwards. Sets the error level at which Tracker is assumed to have found the feature - no further search for a better match is performed. Note:  The transform control must be set to none when calculating tracks. Now, for this trickier example I am going to try and track the tattoo on the girl’s arm. In the Shape tab, set the source to foreground and use translate in the Clone tab to offset the background to a clean patch just next to the marker. …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 … It is a skilled Node-based tool that can import maya models inside the software. Art. Useful Nukepedia Tools #11 W_hotbox by Wouter Gilsing. Then I create a second track on this guy here, go through and make keyframes, and click key track all. So, good frame, problem frame, problem frame, and good frame. We also have a new stop tracking button in the middle (Esc). You will also notice these two boxes up here at the top. Under the Settings, we have a new feature called snap to markers. When transform is set to stabilize or match-move, sets the frame in the input sequence to use as the reference or identity frame. I’m going to bring up a CameraTracker now. If you go back and forth, ideally, you should see that pattern stay static and not move around. It is important to note the height of the Error Curve has now been chopped in half. Once I had that, it was only a small tweak to have it to also create a Nuke “Tracker” node (credit to Mat Power for doing a lot of this side of the coding).

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