So if I will have a keyframe on frame 1 and a keyframe on frame 30, and I was on frame 20, it would track from frame 1 to 30, for example. But we want a better and more deterministic way of solving this problem. We can do this by either dragging and selecting them all in the Viewer, or pressing Ctrl/Cmd+A or pressing the select all button here. A Four Point Track Node for Nuke: effectively a modified CornerPin node that makes it quicker and easier for you to copy/link tracks from a Tracker node than a regular CornerPin node. Apprendre NUKE 6. To do the tracking, we use these controls up in the toolbar here. The CameraTracker lacks a lot of functionality (if there's a way to extrapolate a 2D track from a 3D point, I can't figure out how to do it) and tends to get confused really easily. Description Programme Avis. 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. This allows us to get a good picture of where the track currently is in the frame, and also to position it. You can see we chopped that mountain of error in half. Here we have a hand-held shot, essentially I would like to get a camera track out of this, but the people will interfere with the camera track, so we need to roto them out. Perhaps here is a better explanation of its benefits:-The usual way to do a 4-point track in nuke is to use the Tracker node and then copy the tracks into the "to" fields of a CornerPin node. Let’s move it over to our first peak. The Esc key stops the tracking and C will track forward a frame at a time, and back to the V. Working this way makes it very, very fast to set up tracks to do your tracking. I will do the same further down, and I go to the end and give it one last keyframe. It can mean there was a good track, but it found the pattern to be different but still got the track correct. In this tutorial, we’ll take a look at tracking footage using the 3D “Camera Tracker” node. PointPositionMask - 3D - Gizmos A nice tool to select a chunk of pixels based on their XYZ coordinates from a point position pass. Now that we have a point that we can create an object for, right-click on the point and select create > sphere. Let’s create our first track. Each of these allows us to say what frames we would like to track. Once the solve data is placed in the Viewer, you can zoom in to display the points more clearly. You can see we now have a pair of keyframes. For the moment, let’s simplify things and let’s clear all of these tracks and start from the beginning. But at the same time reducing it will cause lower tracking quality and more tracking … So let’s see how Nuke 7.0 gets on. What snap to markers will do is show what Nuke considers to be a good tracking point. Instantly, if we look at our zoom window, we can see we have a much better lock on the tip of the nose. As soon as you don’t require the offset, use the clear offset button to get rid of it. In this case, I want to track all of them, so I will press go. Hi, my name is Dan Ring. For most project the default 0.7 is useful. Course Number: NUK246 Software Version: 11.2v7 Original Run Date: December 2020 ... Geotracking the tank in the complex shot with manual point tracking for user tracks. It is important to note the height of the Error Curve has now been chopped in half. Related. I designed the node out of frustration at the lack of skew/perspective options in the Tracker node and the time it was taking me to try and replicate the functionality of a four-point Stabilize node from Shake with a CornerPin. Now that we have set up two keyframes around the selected area, from frame 101 to frame 128, I am going to click the key track current (Shift+C) button to track over that difficult region. 4 years ago. Now, let’s start creating some tracks. You will probably want to edit this if you wish to add the plugin to your toolbar. Hello, Dan Ring here, and in this tutorial I’m going to show you how to get started with Nuke’s new Tracker. We also have a lot of the parameters and controls moved into the toolbar, and the tracking controls themselves moved away from the panel. Using keyframe tracking in Nuke 7+ can be useful in this circumstance. In this example, I would like to track the girl’s nose. What that means is that we expect the image patch for this frame to be fairly different from the image patch we originally grabbed at frame 149. Enter tracking number to track 4PX shipments and get delivery status online. One of the main reasons that tracking fails is because the search window is not wide enough to capture the movement between frames. There is also a hide progress button that stops the progress window from popping up when we are tracking. In our panel, we now have four trackers. Description Programme Avis. Nevertheless, this is still much more useful than a regular CornerPin node for four-point tracking. So just close this track for the moment, and just look at the Roto. But closer to our original frame at 149, it’s more green. In this tutorial, I have shown you the four main ways of diagnosing track quality: using the zoom window, the center viewer window, the Curve Editor, and the traffic light warning system (show error on track). I need to be a bit more accurate with my keyframes, as I want to place CG there. If we go back a few frames and move the Tracker to create a new keyframe, you can see a new window appears. grain/noise, lens distortion and 2d tracking. I now have one super track, in this case based on six tracks, but in the past I used sixteen or more trackers to get a good track. Now, one other point, what I need to do is ensure I have a track point up at the top here, within my CameraTracker. Track Threshold. What I need to do is to be able to turn off tracks 1 and 2 as the greenscreen leaves the bottom of the frame. We would start off in exactly the same way as we would with normal tracking. And then offset on the problem frames, check my offsets are good and patterns match. 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. 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. When you work in stereo in Nuke 7.0, you have this new stereo offset parameter, and I can split it open and offset the Roto to where it should be in the left view. If we zoom in on this track, we can see three important things: the first is the track position, the second is the pattern window, and the third is this outer search window. I am going to use the zoom window to give us a precise location for it. Réessayez plus tard. 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