QMediaResource Class▲
-
Header: QMediaResource
-
qmake: QT += multimedia
-
Group: QMediaResource is part of multimedia, multimedia_playback
Detailed Description▲
A media resource is composed of a URL containing the location of the resource and a set of properties that describe the format of the resource. The properties provide a means to assess a resource without first attempting to load it, and in situations where media be represented by multiple alternative representations provide a means to select the appropriate resource.
Media made available by a remote services can often be available in multiple encodings or quality levels, this allows a client to select an appropriate resource based on considerations such as codecs supported, network bandwidth, and display constraints. QMediaResource includes information such as the MIME type, audio and video codecs, audio and video bit rates, and resolution so these constraints and others can be evaluated.
The only mandatory property of a QMediaResource is the url().
See Also▲
See also QMediaContent
Member Function Documentation▲
QMediaResource::QMediaResource()▲
Constructs a null media resource.
QMediaResource::QMediaResource(const QUrl &url, const QString &mimeType = QString())▲
Constructs a media resource with the given mimeType from a url.
QMediaResource::QMediaResource(const QNetworkRequest &request, const QString &mimeType = QString())▲
Constructs a media resource with the given mimeType from a network request.
QMediaResource::QMediaResource(const QMediaResource &other)▲
Constructs a copy of a media resource other.
QMediaResource::~QMediaResource()▲
Destroys a media resource.
int QMediaResource::audioBitRate() const▲
Returns the bit rate in bits per second of a media resource's audio stream.
This may be zero if the bit rate is unknown, or the resource contains no audio stream.
See Also▲
See also setAudioBitRate()
QString QMediaResource::audioCodec() const▲
Returns the audio codec of a media resource.
This may be null if the media resource does not contain an audio stream, or the codec is unknown.
See Also▲
See also setAudioCodec()
int QMediaResource::channelCount() const▲
Returns the number of audio channels in a media resource.
This may be zero if the sample size is unknown, or the resource contains no audio stream.
See Also▲
See also setChannelCount()
qint64 QMediaResource::dataSize() const▲
Returns the size in bytes of a media resource.
This may be zero if the size is unknown.
See Also▲
See also setDataSize()
bool QMediaResource::isNull() const▲
Identifies if a media resource is null.
Returns true if the resource is null, and false otherwise.
QString QMediaResource::language() const▲
Returns the language of a media resource as an ISO 639-2 code.
This may be null if the language is unknown.
See Also▲
See also setLanguage()
QString QMediaResource::mimeType() const▲
Returns the MIME type of a media resource.
This may be null if the MIME type is unknown.
QNetworkRequest QMediaResource::request() const▲
Returns the network request associated with this media resource.
QSize QMediaResource::resolution() const▲
Returns the resolution in pixels of a media resource.
This may be null is the resolution is unknown, or the resource contains no pixel data (i.e. the resource is an audio stream.
See Also▲
See also setResolution()
int QMediaResource::sampleRate() const▲
Returns the audio sample rate of a media resource.
This may be zero if the sample size is unknown, or the resource contains no audio stream.
See Also▲
See also setSampleRate()
void QMediaResource::setAudioBitRate(int rate)▲
Sets the bit rate in bits per second of a media resource's video stream.
See Also▲
See also audioBitRate()
void QMediaResource::setAudioCodec(const QString &codec)▲
void QMediaResource::setChannelCount(int channels)▲
void QMediaResource::setDataSize(const qint64 size)▲
void QMediaResource::setLanguage(const QString &language)▲
void QMediaResource::setResolution(const QSize &resolution)▲
void QMediaResource::setResolution(int width, int height)▲
Sets the width and height in pixels of a media resource.
void QMediaResource::setSampleRate(int sampleRate)▲
void QMediaResource::setVideoBitRate(int rate)▲
Sets the bit rate in bits per second of a media resource's video stream.
See Also▲
See also videoBitRate()
void QMediaResource::setVideoCodec(const QString &codec)▲
QUrl QMediaResource::url() const▲
Returns the URL of a media resource.
int QMediaResource::videoBitRate() const▲
Returns the bit rate in bits per second of a media resource's video stream.
This may be zero if the bit rate is unknown, or the resource contains no video stream.
See Also▲
See also setVideoBitRate()
QString QMediaResource::videoCodec() const▲
Returns the video codec of a media resource.
This may be null if the media resource does not contain a video stream, or the codec is unknonwn.
See Also▲
See also setVideoCodec()
bool QMediaResource::operator!=(const QMediaResource &other) const▲
Compares a media resource to other.
Returns true if they are different, and false otherwise.
QMediaResource &QMediaResource::operator=(const QMediaResource &other)▲
Assigns the value of other to a media resource.
bool QMediaResource::operator==(const QMediaResource &other) const▲
Compares a media resource to other.
Returns true if the resources are identical, and false otherwise.