diff --git a/web/bun.lock b/web/bun.lock
index 1a216352d..65abdf994 100644
--- a/web/bun.lock
+++ b/web/bun.lock
@@ -8,6 +8,7 @@
         "@ant-design/icons": "^6.3.2",
         "@codemirror/lang-json": "^6.0.2",
         "@excalidraw/excalidraw": "0.18.1",
+        "@ffmpeg/core": "0.12.10",
         "@ffmpeg/ffmpeg": "^0.12.15",
         "@ffmpeg/util": "^0.12.2",
         "@mediapipe/tasks-vision": "^1.0.1",
@@ -207,6 +208,8 @@
 
     "@excalidraw/random-username": ["@excalidraw/random-username@1.1.0", "", {}, "sha512-nULYsQxkWHnbmHvcs+efMkJ4/9TtvNyFeLyHdeGxW0zHs6P+jYVqcRff9A6Vq9w9JXeDRnRh2VKvTtS19GW2qA=="],
 
+    "@ffmpeg/core": ["@ffmpeg/core@0.12.10", "", {}, "sha512-dzNplnn2Nxle2c2i2rrDhqcB19q9cglCkWnoMTDN9Q9l3PvdjZWd1HfSPjCNWc/p8Q3CT+Es9fWOR0UhAeYQZA=="],
+
     "@ffmpeg/ffmpeg": ["@ffmpeg/ffmpeg@0.12.15", "", { "dependencies": { "@ffmpeg/types": "^0.12.4" } }, "sha512-1C8Obr4GsN3xw+/1Ww6PFM84wSQAGsdoTuTWPOj2OizsRDLT4CXTaVjPhkw6ARyDus1B9X/L2LiXHqYYsGnRFw=="],
 
     "@ffmpeg/types": ["@ffmpeg/types@0.12.4", "", {}, "sha512-k9vJQNBGTxE5AhYDtOYR5rO5fKsspbg51gbcwtbkw2lCdoIILzklulcjJfIDwrtn7XhDeF2M+THwJ2FGrLeV6A=="],
diff --git a/web/package.json b/web/package.json
index 346ee1b21..a530a1691 100644
--- a/web/package.json
+++ b/web/package.json
@@ -16,6 +16,7 @@
         "@ant-design/icons": "^6.3.2",
         "@codemirror/lang-json": "^6.0.2",
         "@excalidraw/excalidraw": "0.18.1",
+        "@ffmpeg/core": "0.12.10",
         "@ffmpeg/ffmpeg": "^0.12.15",
         "@ffmpeg/util": "^0.12.2",
         "@mediapipe/tasks-vision": "^1.0.1",
diff --git a/web/src/lib/canvas/canvas-video-merge.ts b/web/src/lib/canvas/canvas-video-merge.ts
index a5e29bc62..6dd8d07c9 100644
--- a/web/src/lib/canvas/canvas-video-merge.ts
+++ b/web/src/lib/canvas/canvas-video-merge.ts
@@ -1,5 +1,7 @@
 import { FFmpeg } from "@ffmpeg/ffmpeg";
-import { fetchFile, toBlobURL } from "@ffmpeg/util";
+import ffmpegCoreURL from "@ffmpeg/core?url";
+import ffmpegWasmURL from "@ffmpeg/core/wasm?url";
+import { fetchFile } from "@ffmpeg/util";
 import { getMediaBlob } from "@/services/file-storage";
 
 export type MergeVideoInput = { id: string; url?: string; storageKey?: string };
@@ -12,12 +14,14 @@ async function loadFFmpeg(onProgress?: (progress: MergeVideoProgress) => void) {
     if (!ffmpegPromise) {
         ffmpegPromise = (async () => {
             const ffmpeg = new FFmpeg();
-            const baseURL = "https://unpkg.com/@ffmpeg/core@0.12.10/dist/umd";
             onProgress?.({ phase: "loading", progress: 0 });
-            await ffmpeg.load({
-                coreURL: await toBlobURL(`${baseURL}/ffmpeg-core.js`, "text/javascript"),
-                wasmURL: await toBlobURL(`${baseURL}/ffmpeg-core.wasm`, "application/wasm"),
-            });
+            try {
+                // 核心资产随前端同源发布，避免自部署环境首次合并依赖第三方 CDN。
+                await ffmpeg.load({ coreURL: ffmpegCoreURL, wasmURL: ffmpegWasmURL });
+            } catch (cause) {
+                ffmpeg.terminate();
+                throw new Error("视频合并工具加载失败，请刷新页面后重试", { cause });
+            }
             return ffmpeg;
         })();
     }