QMediaPlayer Class

 player = new QMediaPlayer;
 connect(player, SIGNAL(positionChanged(qint64)), this, SLOT(positionChanged(qint64)));
 player->setMedia(QUrl::fromLocalFile("/Users/me/Music/coolsong.mp3"));
 player->setVolume(50);
 player->play();

 playlist = new QMediaPlaylist;
 playlist->addMedia(QUrl("http://example.com/movie1.mp4"));
 playlist->addMedia(QUrl("http://example.com/movie2.mp4"));
 playlist->addMedia(QUrl("http://example.com/movie3.mp4"));
 playlist->setCurrentIndex(1);

 player = new QMediaPlayer;
 player->setPlaylist(playlist);

 videoWidget = new QVideoWidget;
 player->setVideoOutput(videoWidget);
 videoWidget->show();

 player->play();

Property Documentation

audioAvailable : const bool

This property holds the audio availabilty status for the current media.

As the life time of QMediaPlayer can be longer than the playback of one QMediaContent, this property may change over time, the audioAvailableChanged signal can be used to monitor it's status.

Access functions:

Notifier signal:

audioRole : QAudio::Role

This property holds the role of the audio stream played by the media player.

It can be set to specify the type of audio being played, allowing the system to make appropriate decisions when it comes to volume, routing or post-processing.

The audio role must be set before calling setMedia().

customAudioRole is cleared when this property is set to anything other than QAudio::CustomRole.

This property was introduced in Qt 5.6.

Access functions:

Notifier signal:

See also supportedAudioRoles().

bufferStatus : const int

This property holds the percentage of the temporary buffer filled before playback begins or resumes, from 0 (empty) to 100 (full).

When the player object is buffering; this property holds the percentage of the temporary buffer that is filled. The buffer will need to reach 100% filled before playback can start or resume, at which time mediaStatus() will return BufferedMedia or BufferingMedia. If the value is anything lower than 100, mediaStatus() will return StalledMedia.

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See also mediaStatus().

currentMedia : const QMediaContent

This property holds the current active media content being played by the player object. This value could be different from QMediaPlayer::media property if a playlist is used. In this case currentMedia indicates the current media content being processed by the player, while QMediaPlayer::media property contains the original playlist.

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See also QMediaContent and media().

customAudioRole : QString

This property holds the role of the audio stream played by the media player.

It can be set to specify the type of audio being played when the backend supports audio roles unknown to Qt. Specifying a role allows the system to make appropriate decisions when it comes to volume, routing or post-processing.

The audio role must be set before calling setMedia().

audioRole is set to QAudio::CustomRole when this property is set.

This property was introduced in Qt 5.11.

Access functions:

Notifier signal:

See also supportedCustomAudioRoles().

duration : const qint64

This property holds the duration of the current media.

The value is the total playback time in milliseconds of the current media. The value may change across the life time of the QMediaPlayer object and may not be available when initial playback begins, connect to the durationChanged() signal to receive status notifications.

Access functions:

Notifier signal:

error : const QString

This property holds a string describing the last error condition.

Access functions:

See also error().

media : QMediaContent

This property holds the active media source being used by the player object.

The player object will use the QMediaContent for selection of the content to be played.

By default this property has a null QMediaContent.

Setting this property to a null QMediaContent will cause the player to discard all information relating to the current media source and to cease all I/O operations related to that media.

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Notifier signal:

See also QMediaContent and currentMedia().

mediaStatus : const MediaStatus

This property holds the status of the current media stream.

The stream status describes how the playback of the current stream is progressing.

By default this property is QMediaPlayer::NoMedia

Access functions:

Notifier signal:

See also state.

muted : bool

This property holds the muted state of the current media.

The value will be true if the playback volume is muted; otherwise false.

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Notifier signal:

playbackRate : qreal

This property holds the playback rate of the current media.

This value is a multiplier applied to the media's standard play rate. By default this value is 1.0, indicating that the media is playing at the standard pace. Values higher than 1.0 will increase the rate of play. Values less than zero can be set and indicate the media should rewind at the multiplier of the standard pace.

Not all playback services support change of the playback rate. It is framework defined as to the status and quality of audio and video while fast forwarding or rewinding.

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playlist : QMediaPlaylist*

This property holds the media playlist being used by the player object.

The player object will use the current playlist item for selection of the content to be played.

By default this property is set to null.

If the media playlist is used as a source, QMediaPlayer::currentMedia is updated with a current playlist item. The current source should be selected with QMediaPlaylist::setCurrentIndex(int) instead of QMediaPlayer::setMedia(), otherwise the current playlist will be discarded.

Access functions:

See also QMediaContent.

position : qint64

This property holds the playback position of the current media.

The value is the current playback position, expressed in milliseconds since the beginning of the media. Periodically changes in the position will be indicated with the signal positionChanged(), the interval between updates can be set with QMediaObject's method setNotifyInterval().

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Notifier signal:

seekable : const bool

This property holds the seek-able status of the current media

If seeking is supported this property will be true; false otherwise. The status of this property may change across the life time of the QMediaPlayer object, use the seekableChanged signal to monitor changes.

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Notifier signal:

state : const State

This property holds the media player's playback state.

By default this property is QMediaPlayer::Stopped

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See also mediaStatus(), play(), pause(), and stop().

videoAvailable : const bool

This property holds the video availability status for the current media.

If available, the QVideoWidget class can be used to view the video. As the life time of QMediaPlayer can be longer than the playback of one QMediaContent, this property may change over time, the videoAvailableChanged signal can be used to monitor it's status.

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Notifier signal:

See also QVideoWidget and QMediaContent.

volume : int

This property holds the current playback volume.

The playback volume is scaled linearly, ranging from 0 (silence) to 100 (full volume). Values outside this range will be clamped.

By default the volume is 100.

UI volume controls should usually be scaled nonlinearly. For example, using a logarithmic scale will produce linear changes in perceived loudness, which is what a user would normally expect from a volume control. See QAudio::convertVolume() for more details.

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