diff -Nur dde-file-manager-5.6.4/src/dde-file-manager-plugins/pluginPreview/dde-music-preview-plugin/musicmessageview.cpp dde-file-manager-5.6.4-new/src/dde-file-manager-plugins/pluginPreview/dde-music-preview-plugin/musicmessageview.cpp
--- dde-file-manager-5.6.4/src/dde-file-manager-plugins/pluginPreview/dde-music-preview-plugin/musicmessageview.cpp	2022-06-11 21:02:35.000000000 +0800
+++ dde-file-manager-5.6.4-new/src/dde-file-manager-plugins/pluginPreview/dde-music-preview-plugin/musicmessageview.cpp	2024-03-05 11:16:04.709907308 +0800
@@ -260,9 +260,9 @@
 {
     TagLib::Tag *tag = static_cast<TagLib::Tag *>(obj);
     bool encode = true;
-    encode &= tag->title().isNull() ? true : tag->title().isLatin1();
-    encode &= tag->artist().isNull() ? true : tag->artist().isLatin1();
-    encode &= tag->album().isNull() ? true : tag->album().isLatin1();
+    encode &= tag->title().isEmpty() ? true : tag->title().isLatin1();
+    encode &= tag->artist().isEmpty() ? true : tag->artist().isLatin1();
+    encode &= tag->album().isEmpty() ? true : tag->album().isLatin1();
 
     QByteArray detectByte;
     QByteArray detectCodec;