Qt Multimedia - how to force read tags from media file - qt

Question

It seems to be QMediaPlayer doesn't read tags of playlist files without of executing method play() of current track. Is there a way to force read tags from QMediaPlayer playlist without of playing it?
Sorry if this if a noob question, but I spent a lot of time for searches.
Thanks

Answer 1

Don't waste your time to use QMediaPlayer to read tags (this solution works good, but difficult for many files in list), simply use TagLib or another open-source library.
For example, 3 simple steps to use TagLib in Qt:
1.Compile taglib from source:
$ pwd
/home/user/taglib-1.9.1
$ cmake .
$ make
It's enough to deploy working instance of tag library. Really :)
2.Include headers and library in your project, simply add this or your custom path to project file:
unix:!macx: LIBS += -L$$PWD/3rdparty/taglib-1.9.1/taglib/ -ltag
INCLUDEPATH += $$PWD/3rdparty/taglib-1.9.1/taglib/Headers
DEPENDPATH += $$PWD/3rdparty/taglib-1.9.1/taglib/Headers
3.Use it, very simple function to get media tags from files, in this example artist and title of track:
#include <fileref.h>
#include <tag.h>
QString gettags(QString mediafile){
QString string;
TagLib::FileRef file(mediafile.toUtf8());
TagLib::String artist_string = file.tag()->artist();
TagLib::String title_string = file.tag()->title();
QString artist = QString::fromStdWString(artist_string.toWString());
QString title = QString::fromStdWString(title_string.toWString());
string = artist + " - " + title;
return string;
}

Answer 2

For the current QT/OSX, use this project file snippet (change paths for your system)
QMAKE_MACOSX_DEPLOYMENT_TARGET = 10.11
LIBS += -L/Users/sir/prg.qt/TuneMerge/taglib-1.11.1/taglib/ -ltag -lz
INCLUDEPATH += /Users/sir/prg.qt/TuneMerge/taglib-1.11.1/
INCLUDEPATH += /Users/sir/prg.qt/TuneMerge/taglib-1.11.1/taglib/
INCLUDEPATH += /Users/sir/prg.qt/TuneMerge/taglib-1.11.1/taglib/toolkit/
DEPENDPATH += /Users/sir/prg.qt/TuneMerge/taglib-1.11.1/taglib