剪辑=改引用Editing = Changing References
学习目标LEARNING OBJECTIVES
学完你能说清剪辑时实际在改什么——引用与索引，而不是像素。
概念说明CONCEPTS
时间线上每个片段 = 一条引用：用哪个文件、入出点（源文件第几帧）、时间线位置（第几帧）、元数据（速度、变换、不透明度、音频映射、调色）。剪切=改这些数字。
这件事解释三件常见怪事：工程文件小（只是一张表）；素材挪位置工程全红（路径失效）；交换工程用 XML / AAF / EDL（换的就是这张表）。只有导出 / 渲染才真正重算画面。
操作步骤STEPS
- 把工程文件拖到另一台机器，看它变红
- 把素材挪回原位，红色消失
- 体会：表没变，指向变了
练习PRACTICE
动手任务
把工程里的素材文件夹改名，观察全部变红；再改回来，验证恢复。
自检清单
做完任务后逐条自查，全部能打勾才算过。
常见问题FAQ
工程文件为什么这么小？
它只是一张表：文件、帧号、位置、元数据。
素材挪了位置为什么全红？
表里的路径失效——指向还在，文件不在了。
Learning Objectives学习目标
After this card you can say what editing actually changes — references and indexes, not pixels.
Concepts概念说明
Every clip on the timeline is a reference: which file, in/out points (which frames of the source), timeline position (which frame), plus metadata — speed, transform, opacity, audio mapping, grade. Cutting = editing those numbers.
This explains three everyday oddities: project files are tiny (it's just a table); move your media and everything goes red (dead paths); projects are exchanged as XML / AAF / EDL (you're swapping that table). Only export / render actually recomputes the picture.
Steps操作步骤
- Drag the project file to another machine and watch it go red
- Move the media back and watch the red disappear
- Notice: the table didn't change — the pointing did
Practice练习
Hands-on task
Rename the footage folder inside your project, watch everything go red, then rename it back and verify recovery.
Self-check
Work through the task, then tick every line; all checked means you own this card.
FAQ常见问题
Why are project files so small?
It's just a table: files, frame numbers, positions, metadata.
Why did everything go red when I moved my media?
The paths in the table went dead — the pointing survives, the files don't.
本卡术语Terms in this card
时间线Timeline 导出Export 渲染Render 变速Speed 调色Grade 元数据Metadata 变换Transform 帧Frame 映射（调色）Mapping 像素Pixel 引用（剪辑）Reference