diff --git a/themes/momentry/page-api-demo-query.php b/themes/momentry/page-api-demo-query.php
index 3acb83a..3213e04 100644
--- a/themes/momentry/page-api-demo-query.php
+++ b/themes/momentry/page-api-demo-query.php
@@ -471,13 +471,15 @@ async function semanticSearch() {
             const results = data.results || [];
             resultsHtml = results.map(i => {
                 const textAttr = (i.text_content || '').replace(/"/g, '&quot;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
+                const startTime = i.start_time || (i.start_frame && i.fps ? i.start_frame / i.fps : 0);
+                const endTime = i.end_time || (i.end_frame && i.fps ? i.end_frame / i.fps : startTime + 10);
                 return `<div class="chunk-item clickable"
                      data-file-uuid="${i.file_uuid}"
-                     data-start-time="${i.start_time || 0}"
-                     data-end-time="${i.end_time || (i.start_time || 0) + 10}"
+                     data-start-time="${startTime}"
+                     data-end-time="${endTime}"
                      data-text="${textAttr}">
                     <div style="font-weight: 600; color: #1e40af;">${i.name} (${i.source || 'unknown'})</div>
-                    <div class="chunk-time">${i.file_uuid} | ${(i.start_time || 0).toFixed(1)}s - ${(i.end_time || (i.start_time || 0) + 10).toFixed(1)}s</div>
+                    <div class="chunk-time">${i.file_uuid} | ${startTime.toFixed(1)}s - ${endTime.toFixed(1)}s</div>
                     <div style="margin-top: 4px;">${i.text_content || '無內容'}</div>
                     <button class="play-btn">▶ 播放片段</button>
                 </div>`;
@@ -494,12 +496,14 @@ async function semanticSearch() {
             const results = data.results || [];
             resultsHtml = results.map(r => {
                 const textAttr = (r.text || '').replace(/"/g, '&quot;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
+                const startTime = r.start_time || (r.start_frame && r.fps ? r.start_frame / r.fps : 0);
+                const endTime = r.end_time || (r.end_frame && r.fps ? r.end_frame / r.fps : startTime + 10);
                 return `<div class="chunk-item clickable"
                      data-file-uuid="${r.file_uuid}"
-                     data-start-time="${r.start_time || 0}"
-                     data-end-time="${r.end_time || (r.start_time || 0) + 10}"
+                     data-start-time="${startTime}"
+                     data-end-time="${endTime}"
                      data-text="${textAttr}">
-                    <div class="chunk-time">${r.file_uuid} | ${(r.start_time || 0).toFixed(1)}s - ${(r.end_time || (r.start_time || 0) + 10).toFixed(1)}s</div>
+                    <div class="chunk-time">${r.file_uuid} | ${startTime.toFixed(1)}s - ${endTime.toFixed(1)}s</div>
                     <div style="margin-top: 4px;">${r.text || '無內容'}</div>
                     <div class="badge-status completed" style="margin-top: 4px;">相似度: ${(r.score * 100).toFixed(1)}%</div>
                     <button class="play-btn">▶ 播放片段</button>