点击时间码可跳到 YouTube 对应时刻。校验确认保存内容一致，不代表已经由人工逐字校对。
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A boundary changes the movie, not just dialogue.
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It changes blocking, camera, rhythm, and cut.
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Blocking: change position, distance, movement, or leave the frame.
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Camera: reframe, move away, or stop recording when the boundary changes.
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Rhythm: wait, slow down, or end the take. Continuity can wait.
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Cut: remove an image that no longer fits the boundary.
- 0:32
This is a P4 film-craft reading, not proof of off-camera experience.
- 0:38
If all four stay fixed, nothing changes onscreen.
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For the full P4 film essay, tap the Related video.