Cody Casey
Adobe After Effects is a powerful tool for motion tracking and VFX work. It offers a range of tracking options, including single-point, two-point, and 3D camera tracking, to enhance your video editing capabilities. One common challenge in video editing is stabilising panning shots, which can be achieved through various methods in After Effects. This involves techniques such as motion tracking, using the Pan and Zoom tools, and applying stabilisation settings to smooth out long panning shots. With the right tools and tutorials, you can master the art of tracking and stabilising your footage in After Effects.
| Characteristics | Values |
|---|---|
| Stabilizing a panning shot | Warp stabilizer, Mocha AE plug-in, Mocha Pro, 3D camera-tracking tool, single-point tracker, two-point tracking, spline tracking |
| Tracking a panning shot | Mocha tutorials, Mocha Essentials video training series, Adobe After Effects Tracker panel, Track Type menu, Analyze buttons, Mocha planar tracking & VFX tools |
| Navigating the workspace | Pan and Zoom tools, keyboard shortcuts, magnifying glass icon, Zoom Tool, Pan Tool, hand icon |
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What You'll Learn
Stabilizing a panning shot
When it comes to stabilizing a panning shot in After Effects, there are several methods and workarounds you can use to achieve the desired result. Here are some detailed steps and suggestions to help you stabilize your footage effectively:
Understanding the Challenge
Firstly, it's important to recognize the challenge presented by long panning shots. Due to the continuous movement, there may be no two points that remain on the screen for the entire length of the clip. This can make it difficult to track and stabilize the footage effectively.
Old School Method
If you're dealing with a problematic pan, you can try the old school method. Create a new motion track, not a camera track or stabilize track. Track a point in the scene, and as it reaches the edge of the frame, use the alt/opt key to reposition your search box. You'll know you've done it correctly when you see a little + sign at the position of your original track point.
Warp Stabilizer
The Warp Stabilizer is a useful tool in After Effects for stabilizing footage. When using the Warp Stabilizer, you can select different stabilization options:
- No Motion: Removes all camera motion from the shot.
- Smooth Motion: Retains some of the original camera movement in the stabilized shot.
If you encounter warping or distortion, you can switch the Method to Position, Scale, or Rotation to improve the result.
Mocha AE Plug-in
After Effects includes the Mocha AE plug-in from Boris FX. This plug-in is designed to handle complex tracking shots, including those with motion blur or objects that move off-screen. Mocha Essentials offers a free video training series that teaches you everything you need to know about Mocha AE and Planar Motion Tracking.
Null Object Technique
Another technique involves using Null objects to stabilize your footage. Go to the first frame and parent your footage to Null 1. This will stabilize the image, and the framing will slide off-screen in sync with your pan. Create another null object (Null 3) and parent Null 1 to Null 3. Keyframe the x-position of Null 3 to move your footage across the frame and scale it to eliminate any black edges.
Selective Axis Stabilization
In some cases, you may want to stabilize only a specific axis of movement. For example, you can choose to stabilize just the y-axis, leaving the horizontal movement of the pan intact, or vice versa. This allows you to retain the desired motion while smoothing out unwanted shakes or jitters.
Tracking Tips
Before beginning the tracking process, it's essential to view the entire duration of the shot. This will help you determine the best features to track. A feature that is clearly identifiable in the first frame may later blend into the background due to changes in angle, lighting, or surrounding elements. Stepping through the entire shot will increase your chances of successful tracking.
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Mocha AE and planar motion tracking
Mocha AE is a free lite-version of Mocha Pro's planar motion tracking and masking tools, which are included inside Adobe After Effects. It allows users to easily isolate effects, track and replace screens, and more. Mocha's planar tracking technology enables seamless 3D compositing, animation, and motion graphics shots.
Mocha AE's motion tracking can be used to stabilize panning shots in After Effects. This can be done by first creating a new motion track, and then tracking a point in the scene. As the tracked point reaches the edge of the frame, the search box can be repositioned using the opt/alt function. This will ensure that the tracked point stays on the screen for the entire length of the clip.
Mocha AE layers can be rendered in After Effects with per-point edge feathering and motion blur by choosing “Apply Matte”. Alternatively, for speed and optimization, choose “Create AE Masks” to convert splines to the native AE mask format.
Mocha Pro, the full version of Mocha AE, offers additional features such as a 3D exporter, Alembic and FBX Exports, and MultiPoly Fusion Export. It also includes new tools that make tracking and roto easier, such as the Extrapolate Track feature, which allows users to track objects moving off-screen or behind other objects.
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Tracking 3D camera movement
Step 1: Import and Select Footage
Import your video footage into After Effects and select the layer with the original footage. You can also select multiple layers for camera tracking.
Step 2: Apply the 3D Camera Tracker Effect
Go to the menu bar and select "Animation" > "Track Camera" or choose "Track Camera" from the layer context menu. Alternatively, choose "Effect" > "Perspective" > "3D Camera Tracker" from the menu bar. The 3D Camera Tracker effect will be added to your selected layer, and the analysis will begin in the background.
Step 3: Analyse the Footage
During the analysis phase, After Effects will extract camera motion data from your footage. This process may take some time, especially for longer videos. You can adjust settings or work on other parts of your project while the analysis is in progress.
Step 4: Visualise Tracking Points
Once the analysis is complete, you will see coloured tracking points (small coloured x's) on your footage. To better visualise these points, you can enable the Render Track Points option in the 3D Camera Tracker effects menu.
Step 5: Define the Tracking Plane
Hover your mouse over three tracking points in the composition window to form a triangle. A red "target" will appear, indicating the orientation of the plane in 3D space. Find tracking points that position the red target parallel to the plane you want to track. Left-click the triangle that best aligns with your desired surface.
Step 6: Delete Unwanted Track Points
Moving objects can confuse the 3D camera tracker. To improve the accuracy, delete bad or unwanted track points by selecting them and pressing Delete or choosing "Delete Selected Points" from the context menu.
Step 7: Create a Shadow Catcher Layer
If needed, you can create a "shadow catcher" layer to add realistic shadows to your scene. This layer is a white solid that accepts shadows only. Use the "Create Shadow Catcher, Camera and Light" commands in the context menu to create this layer.
Step 8: Export Camera Data (Optional)
If you want to use the camera data in a 3D application, you can export the 3D Camera Tracker data. Choose "File" > "Export" > "MAXON Cinema 4D Exporter", name your file, and click Save. Then, open the file in your chosen 3D application.
Step 9: Add Text or Effects
With your camera movement tracked, you can now add text, 3D elements, or special effects to your footage. Click "Create Text" to add text to your tracked footage, and use the Transform options to adjust its position and scale.
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Using the Track Type menu
When you choose a mode from the Track Type menu in the Tracker panel, After Effects automatically places the appropriate number of track points in the Layer panel for that mode. You can add more track points to track additional features with a single tracker. Before you begin tracking, view the entire duration of the shot to determine the best features to track. A good practice is to step through the entire shot to select the best candidates for tracking. The tracked feature may disappear off the edge of the frame or be obscured by another element at some point in the scene.
The Raw track type setting only tracks the position. You can use this setting to generate tracking data that you won't apply using the Apply button. For example, you can copy and paste the keyframes for the Attach Point property to the Position property for a paint stroke. No target is associated with a tracker if Raw is selected for Track Type.
When you are using any Track Type setting other than Raw, you apply the tracking data by clicking Apply, after making sure that the correct target is shown for Motion Target. You perform the actual motion tracking step by clicking one of the Analyze buttons in the Tracker panel. When tracking a tricky set of features, you may want to analyze a frame at a time.
You can also use Mocha (free with After Effects) to access advanced tracking methods such as Planar Tracking and Spline Tracking. These methods can provide incredibly accurate results that wouldn't normally be possible in After Effects.
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Creating a fake 3D camera pan effect
Step 1: Shoot Your Footage
When filming your footage, it is recommended to use a tripod to stabilize your camera. Shoot your scene from different camera pan angles, with each element overlapping the next by a significant amount. It is suggested to not change the angle by more than 30 degrees between each shot to avoid distortion during the pan. Label your video files with useful names to identify the different angles.
Step 2: Load Footage into After Effects
Load all your footage elements into After Effects and organize the layers based on the camera pan angles (e.g., 0 degrees, 30 degrees, 60 degrees, etc.). Ensure that your layer names correspond to the angles at which you shot your footage.
Step 3: Create a 3D Scene
Turn all your layers into 3D layers in After Effects. Start with the layer at a 0-degree camera pan angle and hide the others. Create a new camera in After Effects and match its settings, including the focal length, to the camera you used to film your footage. For example, if you shot your scene with a 35mm lens, set your camera in After Effects to 35mm as well.
Step 4: Parent the First Panned Shot to the Camera
Enable visibility of the first panned shot (0-degree angle) and parent it to the camera while it is still at 0 degrees. This will ensure that when you rotate the camera in After Effects, the original 0-degree shot moves out of the frame, while the layered shot remains in the scene.
Step 5: Animate Your Virtual Camera
Now that your 3D scene is set up, you can animate your virtual camera to create the desired fake camera pan effect. Rotate and move your camera within the 3D space to achieve the desired panning motion. Experiment with different angles and positions to see how the changes affect the final effect.
Stabilizing and Troubleshooting:
If you encounter issues with stabilization during your panning shot, there are a few troubleshooting techniques you can try. First, ensure that you are creating a motion track, not a camera track or stabilize track in After Effects. Additionally, you can try the old-school method of tracking a point in the scene and repositioning the search box as the point reaches the edge of the frame. This will create a "+" at the position of your original track point, indicating success.
Warp stabilizer can also be used, but it may cause the clip to become wobbly. To prevent this, change the stabilizing type from subspace warp to scale, rotation, or position. If you are working with a long pan shot and encounter issues with tracking points remaining on the screen, you can try using multiple points in a stabilization track by alt-dragging the tracker to another point.
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Frequently asked questions
The 3D camera-tracking tool in After Effects is one of the most powerful features for motion tracking. It automatically creates dozens of track points and allows you to select which ones to use. Mocha Pro's spline tracking feature is also a great option as it can track any type of shape.
To smooth out a panning shot, you can create a new motion track and track a point in the scene. As the point reaches the edge of the frame, reposition the search box using the opt/alt function.
The Pan Tool is represented by a hand icon and the Zoom Tool by a magnifying glass icon. The Zoom Tool can also be activated by pressing 'Z'. Holding Shift while panning enables faster panning.
