diff --git a/scripts/nodejs/pipeline_native.js b/scripts/nodejs/pipeline_native.js
index cb92fea..1d500d5 100644
--- a/scripts/nodejs/pipeline_native.js
+++ b/scripts/nodejs/pipeline_native.js
@@ -124,8 +124,7 @@ function locateFfmpeg() {
   return whichSync(name);
 }
 
-async function ffmpegExtractAudio(videoPath) {
-  const dest = tempPath("audio", "wav");
+function requireFfmpeg() {
   const ffmpeg = locateFfmpeg();
   if (!ffmpeg) {
     throw new Error(
@@ -133,6 +132,12 @@ async function ffmpegExtractAudio(videoPath) {
         "或在环境变量中设置 AICLIENT_FFMPEG_PATH（桌面端会在启动 Node 时自动注入已解析路径）",
     );
   }
+  return ffmpeg;
+}
+
+async function ffmpegExtractAudio(videoPath) {
+  const dest = tempPath("audio", "wav");
+  const ffmpeg = requireFfmpeg();
   await runCommand(ffmpeg, [
     "-y",
     "-i",
@@ -468,7 +473,8 @@ async function qwenTtsSynthesize(opts) {
       const wavOut = path.join(parsed.dir, `${parsed.name}_merged.wav`);
       concatWavFiles(segmentPaths, wavOut);
       try {
-        await runCommand(exeName(), [
+        const ffmpeg = requireFfmpeg();
+        await runCommand(ffmpeg, [
           "-y",
           "-i",
           wavOut,