跟踪器Tracker
学习目标LEARNING OBJECTIVES
学完你能说清跟踪器（Tracker）是干什么的、什么时候必须用它，并让画好的窗口跟着画面里移动的主体走。
概念说明CONCEPTS
跟踪器（Tracker）是调色页面里分析画面运动、驱动窗口自动跟随主体的工具——窗口负责"圈住哪里"，跟踪器负责"让圈一直跟着它"。
- 窗口本身是静止的：Power Window 画在哪就停在哪，主体一动就偏出圈外。
- 跟踪器逐帧算运动：
Tracker面板分析片段里物体的移动，自动把窗口逐帧搬过去。 - 跟踪挂在节点上：跟踪数据属于当前节点的窗口或选区，二级调色因此始终贴着目标。
- 一键即可完成：播放头放到起始帧，点
Track Forward，自动分析到片段结尾。
操作步骤STEPS
- 在
Color页面选中片段，在当前节点画好窗口圈住主体（画法见 窗口）
- 在中部面板区切换到
Tracker面板 - 把播放头移到片段第一帧
- 点击
Track Forward按钮，等待自动分析到片段结尾
- 回放检查窗口是否全程贴住主体；在检视器左下角把 Overlay 选为
Off，看干净画面
练习PRACTICE
动手任务
- 找一段人物走动的素材，用圆形窗口圈住头部并执行
Track Forward，逐帧确认窗口贴住。 - 按
Command-D/Ctrl-D反复开关该节点，对比加入跟踪调色前后的差别。
自检清单
做完任务后逐条自查，全部能打勾才算过。
Learning Objectives学习目标
After this card you can explain what the Tracker does and when you need it, and make a window follow a moving subject in the shot.
Concepts概念说明
The Tracker is the Color page tool that analyzes motion in a clip and drives a window to follow a subject automatically — the window decides "which area", the Tracker keeps that area glued to its target.
- Windows sit still by default: a Power Window stays where you drew it; the moment the subject moves, it drifts off target.
- The Tracker analyzes frame by frame: the
Trackerpalette measures how objects move and repositions the window on every frame. - Tracking lives on the node: tracking data belongs to the window or selection on the current node, so the secondary grade stays on target.
- One click does the work: park the playhead on the first frame and hit
Track Forwardto analyze through the end of the clip.
Steps操作步骤
- On the
Colorpage, select the clip and draw a window around the subject on the current node (see Power Windows) - Switch to the
Trackerpalette in the central palette row - Move the playhead to the first frame of the clip
- Click the
Track Forwardbutton and let it analyze to the end - Play back and check the window stays on the subject; set the viewer's Overlay (lower-left) to
Offfor a clean view
Practice练习
Hands-on task
- Take a clip of someone walking, circle the head with a window, run
Track Forward, and scrub through to confirm it sticks. - Press
Command-D/Ctrl-Dto toggle the node on and off, comparing the shot with and without the tracked grade.
Self-check
Work through the task, then tick every line; all checked means you own this card.
FAQ常见问题
Why doesn't the window follow the person on its own?
Windows are static by default. Only after you open the Tracker palette and run Track Forward does tracking data make it follow frame by frame.
The window lost the subject halfway — what now?
Stop on the frame where it slipped, drag the window back onto the subject, and continue Track Forward from there — no need to restart. Full repair workflow: Motion Tracking.
Do I have to re-track on every node?
Yes. Tracking data is stored per node, so each windowed node tracks separately; the selection itself can be reused across nodes (see Key Signal).
本卡术语Terms in this card
播放头Playhead 调色页Color page 窗口Power Window 二级调色Secondary Correction 跟踪器Tracker 调色Grade 静帧Still 节点Node 帧Frame PNGPNG