- Qt 5.15
- Qt Multimedia
- QMediaMetaData Namespace
- Qt 5.15.19 Reference Documentation

# QMediaMetaData Namespace

Provides identifiers for meta-data attributes. More...

Header: | #include <QMediaMetaData>
qmake: | QT += multimedia

## Detailed Description

Note: Not all identifiers are supported on all platforms. Please consult vendor documentation for specific support on different platforms.

Common attributes
Value | Description | Type
--- | --- | ---
Title | The title of the media. | QString
SubTitle | The sub-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
Category | The category of the media. | QStringList
Genre | The genre of the media. | QStringList
Year | The year of release of the media. | int
Date | The date of the media. | QDate.
UserRating | A user rating of the media. | int [0..100]
Keywords | A list of keywords describing the media. | QStringList
Language | The language of media, as an ISO 639-2 code. | QString
Publisher | The publisher of the media. | QString
Copyright | The media's copyright notice. | QString
ParentalRating | The parental rating of the media. | QString
RatingOrganization | The organization responsible for the parental rating of the media. | QString
Media attributes
Size | The size in bytes of the media. | qint64
MediaType | The type of the media (audio, video, etc). | QString
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. | QString
AverageLevel | The average volume level of the media. | int
ChannelCount | The number of channels in the media's audio stream. | int
PeakValue | The peak volume of the media's audio stream. | int
SampleRate | The sample rate of the media's audio stream in hertz. | int
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
Composer | The composer of the media. | QStringList
Conductor | The conductor of the media. | QString
Lyrics | The lyrics to the media. | QString
Mood | The mood of the media. | QString
TrackNumber | The track number of the media. | int
TrackCount | The number of tracks on the album containing the media. | int
CoverArtUrlSmall | The URL of a small cover art image. | QUrl
CoverArtUrlLarge | The URL of a large cover art image. | QUrl
CoverArtImage | An embedded cover art image. | QImage
Image and video attributes
Resolution | The dimensions of an image or video. | QSize
PixelAspectRatio | The pixel aspect ratio of an image or video. | QSize
Orientation | Orientation of an image or video. | int (degrees)
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. | QString
PosterUrl | The URL of a poster image. | QUrl
PosterImage | An embedded poster image. | QImage
Movie attributes
ChapterNumber | The chapter number of the media. | int
Director | The director of the media. | QString
LeadPerformer | The lead performer in the media. | QStringList
Writer | The writer of the media. | QStringList
Photo attributes.
CameraManufacturer | The manufacturer of the camera used to capture the media. | QString
CameraModel | The model of the camera used to capture the media. | QString
Event | The event during which the media was captured. | QString
Subject | The subject of the media. | QString
ExposureTime | Exposure time, given in seconds. | qreal
FNumber | The F Number. | int
ExposureProgram | The class of the program used by the camera to set exposure when the picture is taken. | QString
ISOSpeedRatings | Indicates the ISO Speed and ISO Latitude of the camera or input device as specified in ISO 12232. | qreal
ExposureBiasValue | The exposure bias. The unit is the APEX (Additive System of Photographic Exposure) setting. | qreal
DateTimeOriginal | The date and time when the original image data was generated. | QDateTime
DateTimeDigitized | The date and time when the image was stored as digital data. | QDateTime
SubjectDistance | The distance to the subject, given in meters. | qreal
MeteringMode | The metering mode. | QCameraExposure::MeteringMode
LightSource | The kind of light source. | QString
Flash | Status of flash when the image was shot. | QCameraExposure::FlashMode
FocalLength | The actual focal length of the lens, in mm. | qreal
ExposureMode | Indicates the exposure mode set when the image was shot. | QCameraExposure::ExposureMode
WhiteBalance | Indicates the white balance mode set when the image was shot. | QCameraImageProcessing::WhiteBalanceMode
DigitalZoomRatio | Indicates the digital zoom ratio when the image was shot. | qreal
FocalLengthIn35mmFilm | Indicates the equivalent focal length assuming a 35mm film camera, in mm. | qreal
SceneCaptureType | Indicates the type of scene that was shot. It can also be used to record the mode in which the image was shot. | QString
GainControl | Indicates the degree of overall image gain adjustment. | qreal
Contrast | Indicates the direction of contrast processing applied by the camera when the image was shot. | qreal
Saturation | Indicates the direction of saturation processing applied by the camera when the image was shot. | qreal
Sharpness | Indicates the direction of sharpness processing applied by the camera when the image was shot. | qreal
DeviceSettingDescription | Exif tag, indicates information on the picture-taking conditions of a particular camera model. | QString
GPSLatitude | Latitude value of the geographical position (decimal degrees). A positive latitude indicates the Northern Hemisphere, and a negative latitude indicates the Southern Hemisphere. | double
GPSLongitude | Longitude value of the geographical position (decimal degrees). A positive longitude indicates the Eastern Hemisphere, and a negative longitude indicates the Western Hemisphere. | double
GPSAltitude | The value of altitude in meters above sea level. | double
GPSTimeStamp | Time stamp of GPS data. | QDateTime
GPSSatellites | GPS satellites used for measurements. | QString
GPSStatus | Status of GPS receiver at image creation time. | QString
GPSDOP | Degree of precision for GPS data. | qreal
GPSSpeed | Speed of GPS receiver movement in kilometers per hour. | qreal
GPSTrack | Direction of GPS receiver movement. The range of values is [0.0, 360), with 0 direction pointing on either true or magnetic north, depending on GPSTrackRef. | qreal
GPSTrackRef | Reference for movement direction. | QChar. 'T' means true direction and 'M' is magnetic direction.
GPSImgDirection | Direction of image when captured. | qreal The range of values is [0.0, 360).
GPSImgDirectionRef | Reference for image direction. | QChar. 'T' means true direction and 'M' is magnetic direction.
GPSMapDatum | Geodetic survey data used by the GPS receiver. | QString
GPSProcessingMethod | The name of the method used for location finding. | QString
GPSAreaInformation | The name of the GPS area. | QString
ThumbnailImage | An embedded thumbnail image. | QImage