QMediaMetaData Class

Provides meta-data for media files. More...

Header:	#include <QMediaMetaData>
CMake:	find_package(Qt6 COMPONENTS Multimedia REQUIRED) target_link_libraries(mytarget PRIVATE Qt6::Multimedia)
qmake:	QT += multimedia

• List of all members, including inherited members

Public Functions

void	clear()
void	insert(QMediaMetaData::Key k, const QVariant &value)
bool	isEmpty() const
QList<QMediaMetaData::Key>	keys() const
void	remove(QMediaMetaData::Key k)
QString	stringValue(QMediaMetaData::Key key) const
QVariant	value(QMediaMetaData::Key key) const
QVariant &	operator[](QMediaMetaData::Key k)

Static Public Members

QString

metaDataKeyToString(QMediaMetaData::Key key)

Protected Variables

QHash<QMediaMetaData::Key, QVariant>

data

Related Non-Members

bool	operator!=(const QMediaMetaData &a, const QMediaMetaData &b)
bool	operator==(const QMediaMetaData &a, const QMediaMetaData &b)

Detailed Description

Common attributes
Value	Description	Type
Title	The title of the media.	QString
Author	The authors of the media.	QStringList
Comment	A user comment about the media.	QString
Description	A description of the media.	QString
Genre	The genre of the media.	QStringList
Date	The date of the media.	QDate.
Language	The language of media.	QLocale::Language
Publisher	The publisher of the media.	QString
Copyright	The media's copyright notice.	QString
Url	A Url pointing to the origin of the media.	QUrl
Media attributes
MediaType	The type of the media (audio, video, etc).	QString
FileFormat	The file format of the media.	QMediaFormat::FileFormat
Duration	The duration in millseconds of the media.	qint64
Audio attributes
AudioBitRate	The bit rate of the media's audio stream in bits per second.	int
AudioCodec	The codec of the media's audio stream.	QMediaForma::AudioCodec
Video attributes
VideoFrameRate	The frame rate of the media's video stream.	qreal
VideoBitRate	The bit rate of the media's video stream in bits per second.	int
VideoCodec	The codec of the media's video stream.	QMediaFormat::VideoCodec
Music attributes
AlbumTitle	The title of the album the media belongs to.	QString
AlbumArtist	The principal artist of the album the media belongs to.	QString
ContributingArtist	The artists contributing to the media.	QStringList
TrackNumber	The track number of the media.	int
Composer	The composer of the media.	QStringList
LeadPerformer	The lead performer in the media.	QStringList
ThumbnailImage	An embedded thumbnail image.	QImage
CoverArtImage	An embedded cover art image.	QImage
Image and video attributes
Resolution	The dimensions of an image or video.	QSize

Member Function Documentation

[invokable] void QMediaMetaData::clear()

Removes all data from the meta data object.

Note: This function can be invoked via the meta-object system and from QML. See Q_INVOKABLE.

[invokable] void QMediaMetaData::insert(QMediaMetaData::Key k, const QVariant &value)

Inserts a value into a Key: k.

Note: This function can be invoked via the meta-object system and from QML. See Q_INVOKABLE.

[invokable] bool QMediaMetaData::isEmpty() const

Returns true if the meta data contains no items: otherwise returns false.

Note: This function can be invoked via the meta-object system and from QML. See Q_INVOKABLE.

[invokable] QList<QMediaMetaData::Key> QMediaMetaData::keys() const

Returns a QList of QMediaMetaData::Keys.

Note: This function can be invoked via the meta-object system and from QML. See Q_INVOKABLE.

[static invokable] QString QMediaMetaData::metaDataKeyToString(QMediaMetaData::Key key)

returns a string representation of key that can be used when presenting meta data to users.

Note: This function can be invoked via the meta-object system and from QML. See Q_INVOKABLE.

[invokable] void QMediaMetaData::remove(QMediaMetaData::Key k)

Removes meta data from a Key: k.

Note: This function can be invoked via the meta-object system and from QML. See Q_INVOKABLE.

[invokable] QString QMediaMetaData::stringValue(QMediaMetaData::Key key) const

Returns the meta data for key key as a QString.

This is mainly meant to simplify presenting the meta data to a user.

Note: This function can be invoked via the meta-object system and from QML. See Q_INVOKABLE.

[invokable] QVariant QMediaMetaData::value(QMediaMetaData::Key key) const

Returns the meta data value for Key key, or a null QVariant if no meta data for the key is available.

Note: This function can be invoked via the meta-object system and from QML. See Q_INVOKABLE.

QVariant &QMediaMetaData::operator[](QMediaMetaData::Key k)

Returns data stored at the Key k.

QMediaMetaData rockBallad1;
rockBalad[QMediaMetaData::Genre]="Rock"