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QMultimedia 名称空间

The QMultimedia namespace contains miscellaneous identifiers used throughout the Qt Multimedia library. 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

The QMultimedia namespace contains miscellaneous identifiers used throughout the Qt Multimedia library.

类型文档编制

enum QMultimedia:: AvailabilityStatus

Enumerates Service status errors.

常量	值	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	值	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	值
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	值	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.