The QtMultimediaKit namespace contains miscellaneous identifiers used throughout the Qt Media services library. More...
#include <QtMultimediaKit>| enum | AvailabilityError { NoError, ServiceMissingError, ResourceError, BusyError } |
| enum | EncodingMode { ConstantQualityEncoding, ConstantBitRateEncoding, AverageBitRateEncoding, TwoPassEncoding } |
| enum | EncodingQuality { VeryLowQuality, LowQuality, NormalQuality, HighQuality, VeryHighQuality } |
| enum | MetaData { Title, SubTitle, Author, Comment, ..., ThumbnailImage } |
| enum | SupportEstimate { NotSupported, MaybeSupported, ProbablySupported, PreferredService } |
The QtMultimediaKit namespace contains miscellaneous identifiers used throughout the Qt Media services library.
QtMultimediaKit is a module containing the low level, low latency, Multimedia APIs which were introduced in Qt 4.6 and also includes the high level QtMultimedia APIs which were introduced in QtMobility 1.0.
Enumerates Service status errors.
| Constant | Value | Description |
|---|---|---|
| QtMultimediaKit::NoError | 0 | The service is operating correctly. |
| QtMultimediaKit::ServiceMissingError | 1 | There is no service available to provide the requested functionality. |
| QtMultimediaKit::ResourceError | 3 | The service could not allocate resources required to function correctly. |
| QtMultimediaKit::BusyError | 2 | The service must wait for access to necessary resources. |
Enumerates encoding modes.
| Constant | Value |
|---|---|
| QtMultimediaKit::ConstantQualityEncoding | 0 |
| QtMultimediaKit::ConstantBitRateEncoding | 1 |
| QtMultimediaKit::AverageBitRateEncoding | 2 |
| QtMultimediaKit::TwoPassEncoding | 3 |
Enumerates quality encoding levels.
| Constant | Value |
|---|---|
| QtMultimediaKit::VeryLowQuality | 0 |
| QtMultimediaKit::LowQuality | 1 |
| QtMultimediaKit::NormalQuality | 2 |
| QtMultimediaKit::HighQuality | 3 |
| QtMultimediaKit::VeryHighQuality | 4 |
This enum provides identifiers for meta-data attributes.
Note: Not all identifiers are supported on all platforms. Please consult vendor documentation for specific support on different platforms.
Common attributes
| Constant | Value | Description |
|---|---|---|
| QtMultimediaKit::Title | 0 | The title of the media. QString. |
| QtMultimediaKit::SubTitle | 1 | The sub-title of the media. QString. |
| QtMultimediaKit::Author | 2 | The authors of the media. QStringList. |
| QtMultimediaKit::Comment | 3 | A user comment about the media. QString. |
| QtMultimediaKit::Description | 4 | A description of the media. QString |
| QtMultimediaKit::Category | 5 | The category of the media. QStringList. |
| QtMultimediaKit::Genre | 6 | The genre of the media. QStringList. |
| QtMultimediaKit::Year | 7 | The year of release of the media. int. |
| QtMultimediaKit::Date | 8 | The date of the media. QDate. |
| QtMultimediaKit::UserRating | 9 | A user rating of the media. int [0..100]. |
| QtMultimediaKit::Keywords | 10 | A list of keywords describing the media. QStringList. |
| QtMultimediaKit::Language | 11 | The language of media, as an ISO 639-2 code. |
| QtMultimediaKit::Publisher | 12 | The publisher of the media. QString. |
| QtMultimediaKit::Copyright | 13 | The media's copyright notice. QString. |
| QtMultimediaKit::ParentalRating | 14 | The parental rating of the media. QString. |
| QtMultimediaKit::RatingOrganisation | 15 | The organisation responsible for the parental rating of the media. QString. |
Media attributes
| Constant | Value | Description |
|---|---|---|
| QtMultimediaKit::Size | 16 | The size in bytes of the media. qint64 |
| QtMultimediaKit::MediaType | 17 | The type of the media (audio, video, etc). QString. |
| QtMultimediaKit::Duration | 18 | The duration in millseconds of the media. qint64. |
Audio attributes
| Constant | Value | Description |
|---|---|---|
| QtMultimediaKit::AudioBitRate | 19 | The bit rate of the media's audio stream in bits per second. int. |
| QtMultimediaKit::AudioCodec | 20 | The codec of the media's audio stream. QString. |
| QtMultimediaKit::AverageLevel | 21 | The average volume level of the media. int. |
| QtMultimediaKit::ChannelCount | 22 | The number of channels in the media's audio stream. int. |
| QtMultimediaKit::PeakValue | 23 | The peak volume of the media's audio stream. int |
| QtMultimediaKit::SampleRate | 24 | The sample rate of the media's audio stream in hertz. int |
Music attributes
| Constant | Value | Description |
|---|---|---|
| QtMultimediaKit::AlbumTitle | 25 | The title of the album the media belongs to. QString. |
| QtMultimediaKit::AlbumArtist | 26 | The principal artist of the album the media belongs to. QString. |
| QtMultimediaKit::ContributingArtist | 27 | The artists contributing to the media. QStringList. |
| QtMultimediaKit::Composer | 28 | The composer of the media. QStringList. |
| QtMultimediaKit::Conductor | 29 | The conductor of the media. QString. |
| QtMultimediaKit::Lyrics | 30 | The lyrics to the media. QString. |
| QtMultimediaKit::Mood | 31 | The mood of the media. QString. |
| QtMultimediaKit::TrackNumber | 32 | The track number of the media. int. |
| QtMultimediaKit::TrackCount | 33 | The number of tracks on the album containing the media. int. |
| QtMultimediaKit::CoverArtUrlSmall | 34 | The URL of a small cover art image. QUrl. |
| QtMultimediaKit::CoverArtUrlLarge | 35 | The URL of a large cover art image. QUrl. |
| QtMultimediaKit::CoverArtImage | 74 | An embedded cover art image. QImage. |
Image and video attributes
| Constant | Value | Description |
|---|---|---|
| QtMultimediaKit::Resolution | 36 | The dimensions of an image or video. QSize. |
| QtMultimediaKit::PixelAspectRatio | 37 | The pixel aspect ratio of an image or video. QSize. |
Video attributes
| Constant | Value | Description |
|---|---|---|
| QtMultimediaKit::VideoFrameRate | 38 | The frame rate of the media's video stream. qreal. |
| QtMultimediaKit::VideoBitRate | 39 | The bit rate of the media's video stream in bits per second. int. |
| QtMultimediaKit::VideoCodec | 40 | The codec of the media's video stream. QString. |
| QtMultimediaKit::PosterUrl | 41 | The URL of a poster image. QUrl. |
| QtMultimediaKit::PosterImage | 73 | An embedded poster image. QImage. |
Movie attributes
| Constant | Value | Description |
|---|---|---|
| QtMultimediaKit::ChapterNumber | 42 | The chapter number of the media. int. |
| QtMultimediaKit::Director | 43 | The director of the media. QString. |
| QtMultimediaKit::LeadPerformer | 44 | The lead performer in the media. QStringList. |
| QtMultimediaKit::Writer | 45 | The writer of the media. QStringList. |
Photo attributes.
| Constant | Value | Description |
|---|---|---|
| QtMultimediaKit::CameraManufacturer | 46 | The manufacturer of the camera used to capture the media. QString. |
| QtMultimediaKit::CameraModel | 47 | The model of the camera used to capture the media. QString. |
| QtMultimediaKit::Event | 48 | The event during which the media was captured. QString. |
| QtMultimediaKit::Subject | 49 | The subject of the media. QString. |
| QtMultimediaKit::Orientation | 50 | Orientation of image. |
| QtMultimediaKit::ExposureTime | 51 | Exposure time, given in seconds. |
| QtMultimediaKit::FNumber | 52 | The F Number. |
| QtMultimediaKit::ExposureProgram | 53 | The class of the program used by the camera to set exposure when the picture is taken. |
| QtMultimediaKit::ISOSpeedRatings | 54 | Indicates the ISO Speed and ISO Latitude of the camera or input device as specified in ISO 12232. |
| QtMultimediaKit::ExposureBiasValue | 55 | The exposure bias. The unit is the APEX (Additive System of Photographic Exposure) setting. |
| QtMultimediaKit::DateTimeOriginal | 56 | The date and time when the original image data was generated. |
| QtMultimediaKit::DateTimeDigitized | 57 | The date and time when the image was stored as digital data. |
| QtMultimediaKit::SubjectDistance | 58 | The distance to the subject, given in meters. |
| QtMultimediaKit::MeteringMode | 59 | The metering mode. |
| QtMultimediaKit::LightSource | 60 | The kind of light source. |
| QtMultimediaKit::Flash | 61 | Status of flash when the image was shot. |
| QtMultimediaKit::FocalLength | 62 | The actual focal length of the lens, in mm. |
| QtMultimediaKit::ExposureMode | 63 | Indicates the exposure mode set when the image was shot. |
| QtMultimediaKit::WhiteBalance | 64 | Indicates the white balance mode set when the image was shot. |
| QtMultimediaKit::DigitalZoomRatio | 65 | Indicates the digital zoom ratio when the image was shot. |
| QtMultimediaKit::FocalLengthIn35mmFilm | 66 | Indicates the equivalent focal length assuming a 35mm film camera, in mm. |
| QtMultimediaKit::SceneCaptureType | 67 | Indicates the type of scene that was shot. It can also be used to record the mode in which the image was shot. |
| QtMultimediaKit::GainControl | 68 | Indicates the degree of overall image gain adjustment. |
| QtMultimediaKit::Contrast | 69 | Indicates the direction of contrast processing applied by the camera when the image was shot. |
| QtMultimediaKit::Saturation | 70 | Indicates the direction of saturation processing applied by the camera when the image was shot. |
| QtMultimediaKit::Sharpness | 71 | Indicates the direction of sharpness processing applied by the camera when the image was shot. |
| QtMultimediaKit::DeviceSettingDescription | 72 | Exif tag, indicates information on the picture-taking conditions of a particular camera model. QString |
| QtMultimediaKit::ThumbnailImage | 75 | An embedded thumbnail image. QImage. |
Enumerates the levels of support a media service provider may have for a feature.
| Constant | Value | Description |
|---|---|---|
| QtMultimediaKit::NotSupported | 0 | The feature is not supported. |
| QtMultimediaKit::MaybeSupported | 1 | The feature may be supported. |
| QtMultimediaKit::ProbablySupported | 2 | The feature is probably supported. |
| QtMultimediaKit::PreferredService | 3 | The service is the preferred provider of a service. |