波纹覆盖编辑Ripple Overwrite

波纹覆盖编辑（Ripple Overwrite）是 Resolve 独有的四点编辑——源片段的入出点和时间线的入出点同时生效，用新镜头覆盖时间线上圈定的那一段，时长差自动吸收。

• 四个点全算数：普通覆盖（Overwrite）只用三个点，会忽略时间线出点；波纹覆盖把两段时长都纳入计算。
• 时长差自动吸收：新镜头比圈定区域长，后续片段整体后移；短了就前移补位——不留空隙，也不多吞内容。
• 速度保持原样：与适配填充（Fit to Fill）靠变速塞满区域不同，波纹覆盖让源片段按原速播放。
• 区域外绝对安全：变化只发生在圈定区域内部，其余镜头的顺序和内容原样保留。

Ripple Overwrite is Resolve's own four-point edit — the source In/Out points and the timeline In/Out points all count at once. The new shot covers the marked section, and any duration difference is absorbed automatically.

• All four points matter: a plain Overwrite edit uses only three points and ignores the timeline Out point; Ripple Overwrite factors in both durations.
• Differences absorbed by rippling: if the new shot runs longer than the marked section, later clips shift down; if shorter, they shift up — no gaps, no extra footage eaten.
• Speed stays untouched: unlike Fit to Fill, which retimes the source to fill the section, Ripple Overwrite plays the source at its original speed.
• Everything outside is safe: the change is confined to the marked section; the order and content of all other clips stay put.