diff --git a/web/src/pages/app/modules/preview.ts b/web/src/pages/app/modules/preview.ts
index d96aaf9..525a538 100644
--- a/web/src/pages/app/modules/preview.ts
+++ b/web/src/pages/app/modules/preview.ts
@@ -868,15 +868,36 @@ function resetPreviewPlaybackScene() {
 }
 
 function buildPreviewFrameTimes(frames: P_OPERATION["OPERATION"]["frames"]) {
+  const parsedTimes = frames.map((frame) => Number(frame.time));
+  if (shouldTreatFrameTimeAsInterval(parsedTimes)) {
+    let accumulatedTime = 0;
+    return parsedTimes.map((time, index) => {
+      const intervalMs = Number.isFinite(time)
+        ? Math.max(0, time * SECOND_MS)
+        : DEFAULT_PREVIEW_FRAME_INTERVAL_MS;
+      accumulatedTime += index === 0 ? 0 : intervalMs;
+      return accumulatedTime;
+    });
+  }
+
   let previousTime = 0;
-  return frames.map((frame, index) => {
-    const parsed = Number(frame.time);
+  return parsedTimes.map((parsed, index) => {
     const timeMs = Number.isFinite(parsed) ? Math.max(0, parsed * SECOND_MS) : index * DEFAULT_PREVIEW_FRAME_INTERVAL_MS;
     previousTime = index === 0 ? timeMs : Math.max(previousTime + 1, timeMs);
     return previousTime;
   });
 }
 
+function shouldTreatFrameTimeAsInterval(times: number[]) {
+  const validTimes = times.filter(Number.isFinite);
+  if (validTimes.length < 2) return false;
+  let repeatedCount = 0;
+  for (let index = 1; index < validTimes.length; index += 1) {
+    if (Math.abs(validTimes[index] - validTimes[index - 1]) < 0.000001) repeatedCount += 1;
+  }
+  return repeatedCount >= Math.max(1, Math.floor(validTimes.length * 0.6));
+}
+
 function resolvePreviewFrameIndex(currentTimeMs: number, frameTimesMs: number[]) {
   let index = -1;
   for (let i = 0; i < frameTimesMs.length; i += 1) {