精确修剪编辑器Precision Trim Editor
学习目标LEARNING OBJECTIVES
学完你能打开精确修剪编辑器（Precision Trim Editor），在 A/B 卷视图里把编辑点修到逐帧精确。
概念说明CONCEPTS
精确修剪编辑器（Precision Trim Editor）是时间线查看器里的图形化修剪界面——双击编辑点唤出，用上下两条胶片条把编辑点两侧的画面同时摆在眼前。
- A/B 卷布局：上方胶片条是出点侧片段（outgoing），下方是入点侧片段（incoming），编辑点两侧的余量一目了然。
- 拖哪边修哪边：拖上条左端修出点、拖下条右端修入点；拖中间的白色手柄做滚动编辑（Roll Edit），两边一起动。
- 帧数看得见：拖动时每帧都有数字标注，查看器工具栏还有逐帧微调按钮，精确到帧。
- 比时间线直观：不用在时间线上眯眼对帧，修剪时同步预览两侧画面（见 修剪）。
操作步骤STEPS
- 在时间线上双击两个片段之间的编辑点
- 查看器切换为 A/B 卷视图：上条是出点侧、下条是入点侧
- 拖上条左端修出点，或拖下条右端修入点，边看帧数标注
- 要两边一起动，拖两条胶片条之间的白色手柄做滚动编辑
- 用工具栏逐帧按钮微调到位，点击时间线退出编辑器
练习PRACTICE
- 挑一个编辑点，在精确修剪编辑器里把出点精确延长 10 帧，用帧数计数验证。
- 用白色手柄把同一编辑点向左滚动 5 帧，确认两侧片段长度一减一增。
常见问题FAQ
双击编辑点没反应怎么办？
确认双击的是两个片段的接缝，而不是片段中间。也可以选中编辑点后从 Trim 菜单选 Trim Editor 打开。
在这里修剪和时间线上直接拖有什么区别？
本质是同一种修剪，但这里视图更大、带帧数标注和逐帧按钮，适合只差几帧的精修；时间线拖拽适合粗调。
拖错了能撤销吗？
可以，Cmd-Z / Ctrl-Z 照常撤销。修剪只移动编辑点，不会丢任何素材。
Learning Objectives学习目标
After this card you can open the Precision Trim Editor and adjust an edit point frame-accurately in its A/B roll view.
Concepts概念说明
The Precision Trim Editor is a graphical trimming interface inside the timeline viewer — double-click an edit point to summon it, and two filmstrips put both sides of the cut in front of you.
- A/B roll layout: the top filmstrip is the outgoing clip, the bottom one the incoming clip — every spare frame on both sides of the edit stays visible.
- Drag the side you trim: drag the top strip's left end to trim the Out point, the bottom strip's right end for the In point, or the white handle between them to roll both at once.
- Frames counted for you: every frame you drag is numbered, and the viewer toolbar carries one-frame nudge buttons — precision down to the frame.
- Clearer than the timeline: no squinting at the timeline to line up frames; you preview both sides while you trim (see Trimming).
Steps操作步骤
- Double-click the edit point between two clips in the timeline
- The viewer switches to the A/B roll view: outgoing on top, incoming on the bottom
- Drag the top strip's left end for the Out point, or the bottom strip's right end for the In point, watching the frame counters
- To move both sides together, drag the white handle between the strips for a roll edit
- Nudge with the one-frame toolbar buttons, then click the timeline to exit the editor
Practice练习
- Pick an edit point and extend its Out point by exactly 10 frames in the Precision Trim Editor — verify with the frame counter.
- Use the white handle to roll the same edit point 5 frames left; confirm one clip gains what the other loses.
FAQ常见问题
Double-clicking the edit point does nothing?
Make sure you're hitting the seam between two clips, not the middle of a clip. You can also select the edit point and choose Trim Editor from the Trim menu.
How is this different from dragging in the timeline?
It's the same trim underneath — but with a bigger view, frame counters, and one-frame buttons, it's built for final tweaks; timeline dragging suits rough adjustments.
Can I undo a bad drag here?
Yes — Cmd-Z / Ctrl-Z works as usual. Trimming only moves the edit point; no media is lost.
深度资料：精确修剪编辑器 →Deep dive: 精确修剪编辑器 →