diff --git a/public/editor.js b/public/editor.js
index 2f30fa9..b6e04f5 100644
--- a/public/editor.js
+++ b/public/editor.js
@@ -186,14 +186,21 @@
     endSec.value = trimEnd == null ? '' : trimEnd.toFixed(2)
   }
 
+  function applyMetadata() {
+    var d = editVideo.duration
+    if (!d || !isFinite(d) || d <= 0) return
+    duration = d
+    // 잘못 저장돼있던 값 보정
+    trimStart = clamp(trimStart, 0, Math.max(0, duration - MIN_SELECTION))
+    if (trimEnd != null) trimEnd = clamp(trimEnd, trimStart + MIN_SELECTION, duration)
+    renderTimeline()
+  }
+
   if (editVideo) {
-    editVideo.addEventListener('loadedmetadata', function () {
-      duration = editVideo.duration || 0
-      // 잘못 저장돼있던 값 보정
-      trimStart = clamp(trimStart, 0, Math.max(0, duration - MIN_SELECTION))
-      if (trimEnd != null) trimEnd = clamp(trimEnd, trimStart + MIN_SELECTION, duration)
-      renderTimeline()
-    })
+    // 스크립트가 loadedmetadata 이후에 실행되는 경우 (인라인 src) 도 커버.
+    if (editVideo.readyState >= 1) applyMetadata()
+    editVideo.addEventListener('loadedmetadata', applyMetadata)
+    editVideo.addEventListener('durationchange', applyMetadata)
     editVideo.addEventListener('timeupdate', renderTimeline)
     editVideo.addEventListener('seeked', renderTimeline)
   }