QVideoEncoderSettings 类提供一组视频编码器设置。 更多...
头: | #include <QVideoEncoderSettings> |
qmake: | QT += multimedia |
QVideoEncoderSettings (const QVideoEncoderSettings & other ) | |
QVideoEncoderSettings () | |
QVideoEncoderSettings & | operator= (const QVideoEncoderSettings & other ) |
~QVideoEncoderSettings () | |
int | bitRate () const |
QString | codec () const |
QMultimedia::EncodingMode | encodingMode () const |
QVariant | encodingOption (const QString & option ) const |
QVariantMap | encodingOptions () const |
qreal | frameRate () const |
bool | isNull () const |
QMultimedia::EncodingQuality | quality () const |
QSize | resolution () const |
void | setBitRate (int value ) |
void | setCodec (const QString & codec ) |
void | setEncodingMode (QMultimedia::EncodingMode mode ) |
void | setEncodingOption (const QString & option , const QVariant & value ) |
void | setEncodingOptions (const QVariantMap & options ) |
void | setFrameRate (qreal rate ) |
void | setQuality (QMultimedia::EncodingQuality quality ) |
void | setResolution (const QSize & resolution ) |
void | setResolution (int width , int height ) |
bool | operator!= (const QVideoEncoderSettings & other ) const |
bool | operator== (const QVideoEncoderSettings & other ) const |
视频编码器设置对象用于指定视频编码器设置使用通过 QMediaRecorder . Video encoder settings are selected by constructing a QVideoEncoderSettings object, setting the desired properties and then passing it to a QMediaRecorder instance using the QMediaRecorder::setEncodingSettings () 函数。
QVideoEncoderSettings videoSettings; videoSettings.setCodec("video/mpeg2"); videoSettings.setResolution(640, 480); recorder->setVideoSettings(videoSettings);
另请参阅 QMediaRecorder and QVideoEncoderSettingsControl .
Constructs a copy of the video encoder settings object other .
Constructs a null video encoder settings object.
Assigns the value of other to a video encoder settings object.
Destroys a video encoder settings object.
Returns bit rate of the encoded video stream in bits per second.
另请参阅 setBitRate ().
Returns the video codec.
另请参阅 setCodec ().
返回视频编码模式。
另请参阅 setEncodingMode () 和 QMultimedia::EncodingMode .
返回值为编码 option .
另请参阅 setEncodingOption () 和 encodingOptions ().
返回所有编码选项按 QVariantMap .
另请参阅 encodingOption () 和 setEncodingOptions ().
返回视频帧速率。
另请参阅 setFrameRate ().
Identifies if a video encoder settings object is uninitalized.
Returns true if the settings are null, and false if they are not.
返回视频编码品质。
另请参阅 setQuality ().
Returns the resolution of the encoded video.
另请参阅 setResolution ().
Sets the bit rate of the encoded video stream to value .
另请参阅 bitRate ().
设置视频 codec .
另请参阅 codec ().
Sets the video encoding mode .
若 QMultimedia::ConstantQualityEncoding is set, the quality encoding parameter is used and bit rate is ignored, otherwise the bitrate is used.
The rest of encoding settings are respected regardless of encoding mode.
另请参阅 encodingMode () 和 QMultimedia::EncodingMode .
设置编码 option value .
The supported set and meaning of encoding options are system and selected codec specific.
另请参阅 encodingOption () 和 setEncodingOptions ().
Replace all the encoding options with options .
The supported set and meaning of encoding options are system and selected codec specific.
另请参阅 encodingOptions (), encodingOption (),和 setEncodingOption ().
Sets the video frame rate .
A value of 0 indicates the encoder should make an optimal choice based on what is available from the video source and the limitations of the codec.
另请参阅 frameRate ().
Sets the video encoding quality .
Setting the video quality parameter allows backend to choose the balanced set of encoding parameters to achieve the desired quality level.
The quality settings parameter is only used in the constant quality encoding mode 。 quality settings parameter is only used in the constant quality encoding mode .
另请参阅 quality ().
设置 resolution of the encoded video.
空 QSize indicates the encoder should make an optimal choice based on what is available from the video source and the limitations of the codec.
另请参阅 resolution ().
设置 width and height of the resolution of the encoded video.
这是重载函数。
Determines if other is of equal value to a video encoder settings object.
Returns true if the settings objects are not of equal value, and false if they are of equal value.
Determines if other is of equal value to a video encoder settings object.
Returns true if the settings objects are of equal value, and false if they are not of equal value.