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▶ Motion graphics

Time remap

타임 리맵

After Effects' feature for keyframing a layer's own playback position over time — freely combining a freeze frame, reverse playback, and repeated segments.

Also known as: Time remapping
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html
<div class="stage">
  <svg class="curve" viewBox="0 0 100 40" preserveAspectRatio="none">
    <line x1="0" y1="40" x2="100" y2="0" class="ghost"/>
    <polyline points="0,36 22,14 40,14 40,30 62,30 62,4 100,4" />
  </svg>
  <div class="track"><i class="box"></i></div>
  <div class="tags"><span>정상</span><span>정지</span><span>역재생</span><span>빠르게</span></div>
</div>
css
.stage{position:absolute;inset:12% 8%;display:grid;grid-template-rows:1fr auto auto;gap:10px}
.curve{display:block;width:100%;height:100%;min-height:0;overflow:visible}
.curve .ghost{stroke:var(--line);stroke-width:1;stroke-dasharray:2 2}
.curve polyline{fill:none;stroke:var(--accent);stroke-width:2;vector-effect:non-scaling-stroke}
.track{position:relative;height:10px;border-radius:6px;background:var(--line)}
.box{position:absolute;top:50%;width:16px;height:16px;margin-top:-8px;border-radius:4px;background:var(--accent-2);
  animation:remap-move 5s linear infinite}
@keyframes remap-move{
  0%{left:0%} 22%{left:22%} 40%{left:40%} 62%{left:22%} 62.001%{left:22%} 80%{left:60%} 100%{left:calc(100% - 16px)}
}
.tags{display:flex;justify-content:space-between;font:9px/1 ui-monospace,monospace;color:var(--muted)}

Ordinary keyframes describe how a position changes. Time remap describes how time itself flows. Turning it on for a layer adds a new value graph to the timeline, and each point on that graph says "show this second of the source footage right now."

A flat stretch of the graph freezes on one frame, repeating it — a freeze frame. A downward slope plays the footage backward. The steeper the slope, the faster the source footage gets skipped through, which speeds up playback. If speed ramping is only about "how fast," time remap is the broader concept that also covers freezing and reversing.

Because the keyframes are drawn directly in the graph editor, it makes precise moves possible — like a "punch freeze" that holds dead still for a few frames right at an action's impact, then resumes.

When to use

Whenever you mix in reverse or freeze segments, check the audio too — footage that stops while sound keeps playing feels wrong.