- MP4TagsSetName( tags, md->name );
- MP4TagsSetArtist( tags, md->artist );
- MP4TagsSetComposer( tags, md->composer );
- MP4TagsSetComments( tags, md->comment );
- MP4TagsSetReleaseDate( tags, md->release_date );
- MP4TagsSetAlbum( tags, md->album );
- MP4TagsSetGenre( tags, md->genre );
+ if( strlen( md->name ))
+ MP4TagsSetName( tags, md->name );
+ if( strlen( md->artist ))
+ MP4TagsSetArtist( tags, md->artist );
+ if( strlen( md->composer ))
+ MP4TagsSetComposer( tags, md->composer );
+ if( strlen( md->comment ))
+ MP4TagsSetComments( tags, md->comment );
+ if( strlen( md->release_date ))
+ MP4TagsSetReleaseDate( tags, md->release_date );
+ if( strlen( md->album ))
+ MP4TagsSetAlbum( tags, md->album );
+ if( strlen( md->genre ))
+ MP4TagsSetGenre( tags, md->genre );