From 4e174297cab2c29809e9bdc704e8528ad7bd5544 Mon Sep 17 00:00:00 2001
From: Timur Cravtov <timurcravtov04@gmail.com>
Date: Fri, 6 Mar 2026 22:40:05 +0200
Subject: [PATCH] fix: move mvhd tag to run before udta guard

---
 js/metadata.js | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/js/metadata.js b/js/metadata.js
index 77bbed8..d8edb15 100644
--- a/js/metadata.js
+++ b/js/metadata.js
@@ -234,9 +234,6 @@ async function readM4aMetadata(file, metadata) {
         const moovData = new DataView(view.buffer, moovStart, moovLen);
         const moovAtoms = parseMp4Atoms(moovData);
 
-        const udta = moovAtoms.find((a) => a.type === 'udta');
-        if (!udta) return;
-
 
         // mvhd metadata tag
         const mvhd = moovAtoms.find((a) => a.type === 'mvhd');
@@ -264,6 +261,10 @@ async function readM4aMetadata(file, metadata) {
             }
         }
 
+        const udta = moovAtoms.find((a) => a.type === 'udta');
+        if (!udta) return;
+
+
         const udtaStart = moovStart + udta.offset + 8;
         const udtaLen = udta.size - 8;
         const udtaData = new DataView(view.buffer, udtaStart, udtaLen);