From 467689a441c11d411b570e5115487fae6f314424 Mon Sep 17 00:00:00 2001
From: Sorrow446 <47045733+Sorrow446@users.noreply.github.com>
Date: Mon, 1 Jan 2024 01:34:10 +0000
Subject: [PATCH] https://github.com/Sorrow446/go-mp4tag/issues/10 fix

https://github.com/Sorrow446/go-mp4tag/issues/10
---
 write.go | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/write.go b/write.go
index 2593feb..c05b3f7 100644
--- a/write.go
+++ b/write.go
@@ -351,8 +351,7 @@ func (mp4 MP4) readToOffset(f *os.File, startOffset int64) error {
 		readI64 := int64(read)
 		totalRead += readI64
 		if totalRead > startOffset {
-			// Okay?
-			_, err = f.Write(buf[:totalRead-readI64+startOffset])
+			_, err = f.Write(buf[:readI64+startOffset-totalRead])
 			if err != nil {
 				return err
 			}