diff --git a/src/main.ts b/src/main.ts
index 814ed76..d896c29 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -89,7 +89,7 @@ app.whenReady().then(() => {
     const tmpFile = getNewFilename(file, "TMP_");
     let outFile;
 
-    const audioTracks = getNumberOfAudioTracks(file);
+    let audioTracks = getNumberOfAudioTracks(file);
 
     switch (audioTracks.length) {
       case 2:
@@ -120,6 +120,8 @@ app.whenReady().then(() => {
         // Delete the temporary video file
         deleteFile(tmpFile);
 
+        audioTracks = getNumberOfAudioTracks(outFile);
+
         break;
       default:
         // Other cases: no merge needed