QMultimedia 名称空间

QMultimedia 名称空间包含用于整个 Qt Multimedia 库的杂项标识符。 更多...

头: #include <QMultimedia>
qmake: QT += multimedia

    类型

    enum AvailabilityStatus { Available, ServiceMissing, ResourceError, Busy }
    enum EncodingMode { ConstantQualityEncoding, ConstantBitRateEncoding, AverageBitRateEncoding, TwoPassEncoding }
    enum EncodingQuality { VeryLowQuality, LowQuality, NormalQuality, HighQuality, VeryHighQuality }
    enum SupportEstimate { NotSupported, MaybeSupported, ProbablySupported, PreferredService }

    详细描述

    类型文档编制

    enum QMultimedia:: AvailabilityStatus

    Enumerates Service status errors.

    常量 描述
    QMultimedia::Available 0 The service is operating correctly.
    QMultimedia::ServiceMissing 1 There is no service available to provide the requested functionality.
    QMultimedia::ResourceError 3 The service could not allocate resources required to function correctly.
    QMultimedia::Busy 2 The service must wait for access to necessary resources.

    enum QMultimedia:: EncodingMode

    枚举编码模式。

    常量 描述
    QMultimedia::ConstantQualityEncoding 0 Encoding will aim to have a constant quality, adjusting bitrate to fit.
    QMultimedia::ConstantBitRateEncoding 1 Encoding will use a constant bit rate, adjust quality to fit.
    QMultimedia::AverageBitRateEncoding 2 Encoding will try to keep an average bitrate setting, but will use more or less as needed.
    QMultimedia::TwoPassEncoding 3 The media will first be processed to determine the characteristics, and then processed a second time allocating more bits to the areas that need it.

    enum QMultimedia:: EncodingQuality

    枚举品质编码级别。

    常量
    QMultimedia::VeryLowQuality 0
    QMultimedia::LowQuality 1
    QMultimedia::NormalQuality 2
    QMultimedia::HighQuality 3
    QMultimedia::VeryHighQuality 4

    enum QMultimedia:: SupportEstimate

    Enumerates the levels of support a media service provider may have for a feature.

    常量 描述
    QMultimedia::NotSupported 0 不支持特征。
    QMultimedia::MaybeSupported 1 The feature may be supported.
    QMultimedia::ProbablySupported 2 The feature is probably supported.
    QMultimedia::PreferredService 3 The service is the preferred provider of a service.