描述多媒體文件 (或流) 的編碼格式。 更多...
| 頭: |
#include <QMediaFormat>
|
| CMake: |
find_package(Qt6 REQUIRED COMPONENTS Multimedia)
target_link_libraries(mytarget PRIVATE Qt6::Multimedia)
|
| qmake: |
QT += multimedia
|
| 枚舉類 | AudioCodec { WMA, AC3, AAC, ALAC, DolbyTrueHD, …, Unspecified } |
| enum | ConversionMode { Encode, Decode } |
| enum | FileFormat { WMA, AAC, Matroska, WMV, MP3, …, UnspecifiedFormat } |
| enum | ResolveFlags { NoFlags, RequiresVideo } |
| 枚舉類 | VideoCodec { VP8, MPEG2, MPEG1, WMV, H265, …, Unspecified } |
| QMediaFormat (QMediaFormat::FileFormat format = UnspecifiedFormat) | |
| QMediaFormat (const QMediaFormat & other ) | |
| QMediaFormat (QMediaFormat && other ) | |
| ~QMediaFormat () | |
| QMediaFormat::AudioCodec | audioCodec () const |
| QMediaFormat::FileFormat | fileFormat () const |
| bool | isSupported (QMediaFormat::ConversionMode mode ) const |
| QMimeType | mimeType () const |
| void | resolveForEncoding (QMediaFormat::ResolveFlags flags ) |
| void | setAudioCodec (QMediaFormat::AudioCodec codec ) |
| void | setFileFormat (QMediaFormat::FileFormat f ) |
| void | setVideoCodec (QMediaFormat::VideoCodec codec ) |
| QList<QMediaFormat::AudioCodec> | supportedAudioCodecs (QMediaFormat::ConversionMode m ) |
| QList<QMediaFormat::FileFormat> | supportedFileFormats (QMediaFormat::ConversionMode m ) |
| QList<QMediaFormat::VideoCodec> | supportedVideoCodecs (QMediaFormat::ConversionMode m ) |
| void | swap (QMediaFormat & other ) |
| QMediaFormat::VideoCodec | videoCodec () const |
| bool | operator!= (const QMediaFormat & other ) const |
| QMediaFormat & | operator= (QMediaFormat && other ) |
| QMediaFormat & | operator= (const QMediaFormat & other ) |
| bool | operator== (const QMediaFormat & other ) const |
| QString | audioCodecDescription (QMediaFormat::AudioCodec codec ) |
| QString | audioCodecName (QMediaFormat::AudioCodec codec ) |
| QString | fileFormatDescription (QMediaFormat::FileFormat fileFormat ) |
| QString | fileFormatName (QMediaFormat::FileFormat fileFormat ) |
| QString | videoCodecDescription (QMediaFormat::VideoCodec codec ) |
| QString | videoCodecName (QMediaFormat::VideoCodec codec ) |
QMediaFormat 描述多媒體文件 (或流) 的編碼格式。
You can check whether a certain media format can be used for encoding or decoding using QMediaFormat.
Describes the audio codec used in multimedia file or stream.
| 常量 | 值 | 描述 |
|---|---|---|
QMediaFormat::AudioCodec::WMA
|
9
|
WMA (Windows 媒體音頻) |
QMediaFormat::AudioCodec::AC3
|
2
|
杜比數字 |
QMediaFormat::AudioCodec::AAC
|
1
|
AAC (高級音頻編碼) |
QMediaFormat::AudioCodec::ALAC
|
10
|
ALAC (Apple 無損音頻編解碼器) |
QMediaFormat::AudioCodec::DolbyTrueHD
|
5
|
杜比 TrueHD |
QMediaFormat::AudioCodec::EAC3
|
3
|
杜比數字 + (EAC3) |
QMediaFormat::AudioCodec::MP3
|
0
|
MPEG-1 音頻層 III (或 MPEG-2 音頻層 III) |
QMediaFormat::AudioCodec::Wave
|
8
|
波形音頻文件格式 |
QMediaFormat::AudioCodec::Vorbis
|
7
|
Ogg Vorbis |
QMediaFormat::AudioCodec::FLAC
|
4
|
FLAC (自由無損音頻編解碼器) |
QMediaFormat::AudioCodec::Opus
|
6
|
Opus 音頻格式 |
QMediaFormat::AudioCodec::Unspecified
|
-1
|
未指定編解碼器 |
In many cases, systems have asymmetric capabilities and can often decode more formats or codecs than can be encoded. This enum describes the requested conversion mode to be used when checking whether a certain file format or codec is supported.
| 常量 | 值 | 描述 |
|---|---|---|
QMediaFormat::Encode
|
0
|
Used to check whether a certain file format or codec can be encoded. |
QMediaFormat::Decode
|
1
|
Used to check whether a certain file format or codec can be decoded. |
另請參閱 supportedFileFormats , supportedAudioCodecs ,和 supportedVideoCodecs .
Describes the container format used in a multimedia file or stream.
| 常量 | 值 | 描述 |
|---|---|---|
QMediaFormat::WMA
|
9
|
WMA (Windows 媒體音頻) |
QMediaFormat::AAC
|
8
|
AAC (高級音頻編碼) |
QMediaFormat::Matroska
|
2
|
Matroska (MKV) |
QMediaFormat::WMV
|
0
|
WMV (Windows 媒體視頻) |
QMediaFormat::MP3
|
10
|
MPEG-1 音頻層 III (或 MPEG-2 音頻層 III) |
QMediaFormat::Wave
|
12
|
波形音頻文件格式 |
QMediaFormat::Ogg
|
4
|
Ogg |
QMediaFormat::MPEG4
|
3
|
MPEG-4 |
QMediaFormat::AVI
|
1
|
AVI (音頻視頻交錯) |
QMediaFormat::QuickTime
|
5
|
QuickTime |
QMediaFormat::WebM
|
6
|
WebM |
QMediaFormat::Mpeg4Audio
|
7
|
MPEG-4 第 3 部分或 MPEG-4 音頻 (正式 ISO/IEC 14496-3) |
QMediaFormat::FLAC
|
11
|
FLAC (自由無損音頻編解碼器) |
QMediaFormat::UnspecifiedFormat
|
-1
|
The format is unspecified. |
Describes the requirements for resolving a suitable format for QMediaRecorder .
| 常量 | 值 | 描述 |
|---|---|---|
QMediaFormat::NoFlags
|
0
|
No requirements |
QMediaFormat::RequiresVideo
|
1
|
A video codec is required |
另請參閱 resolveForEncoding ().
Describes the video coded used in multimedia file or stream.
| 常量 | 值 | 描述 |
|---|---|---|
QMediaFormat::VideoCodec::VP8
|
5
|
VP8 |
QMediaFormat::VideoCodec::MPEG2
|
1
|
MPEG-2 |
QMediaFormat::VideoCodec::MPEG1
|
0
|
MPEG-1 |
QMediaFormat::VideoCodec::WMV
|
9
|
WMV (Windows 媒體視頻) |
QMediaFormat::VideoCodec::H265
|
4
|
High Efficiency Video Coding (HEVC) |
QMediaFormat::VideoCodec::H264
|
3
|
Advanced Video Coding |
QMediaFormat::VideoCodec::MPEG4
|
2
|
MPEG-4 |
QMediaFormat::VideoCodec::AV1
|
7
|
AOMedia Video 1 |
QMediaFormat::VideoCodec::MotionJPEG
|
10
|
MotionJPEG |
QMediaFormat::VideoCodec::VP9
|
6
|
VP9 |
QMediaFormat::VideoCodec::Theora
|
8
|
Theora |
QMediaFormat::VideoCodec::Unspecified
|
-1
|
Video codec not specified |
This property holds the audio codec of the media.
訪問函數:
| QMediaFormat::AudioCodec | audioCodec () const |
| void | setAudioCodec (QMediaFormat::AudioCodec codec ) |
另請參閱 QMediaFormat::AudioCodec .
This property holds the file (container) format of the media.
訪問函數:
| QMediaFormat::FileFormat | fileFormat () const |
| void | setFileFormat (QMediaFormat::FileFormat f ) |
另請參閱 QMediaFormat::FileFormat .
This property holds the video codec of the media.
訪問函數:
| QMediaFormat::VideoCodec | videoCodec () const |
| void | setVideoCodec (QMediaFormat::VideoCodec codec ) |
另請參閱 QMediaFormat::VideoCodec .
構造 QMediaFormat 對象為 format .
[noexcept]
QMediaFormat::
QMediaFormat
(const
QMediaFormat
&
other
)
構造 QMediaFormat 對象通過拷貝自 other .
[noexcept]
QMediaFormat::
QMediaFormat
(
QMediaFormat
&&
other
)
構造 QMediaFormat 對象通過移動自 other .
[noexcept]
QMediaFormat::
~QMediaFormat
()
銷毀 QMediaFormat 對象。
Returns the audio codec used in this format.
注意: Getter function for property audioCodec.
另請參閱 setAudioCodec () 和 QMediaFormat::AudioCodec .
[static invokable]
QString
QMediaFormat::
audioCodecDescription
(
QMediaFormat::AudioCodec
codec
)
Returns a description for codec .
注意: 此函數可以被援引,通過元對象係統和從 QML。見 Q_INVOKABLE .
[static invokable]
QString
QMediaFormat::
audioCodecName
(
QMediaFormat::AudioCodec
codec
)
Returns a string based name for codec .
注意: 此函數可以被援引,通過元對象係統和從 QML。見 Q_INVOKABLE .
[static invokable]
QString
QMediaFormat::
fileFormatDescription
(
QMediaFormat::FileFormat
fileFormat
)
Returns a description for fileFormat .
注意: 此函數可以被援引,通過元對象係統和從 QML。見 Q_INVOKABLE .
[static invokable]
QString
QMediaFormat::
fileFormatName
(
QMediaFormat::FileFormat
fileFormat
)
Returns a string based name for fileFormat .
注意: 此函數可以被援引,通過元對象係統和從 QML。見 Q_INVOKABLE .
[invokable]
bool
QMediaFormat::
isSupported
(
QMediaFormat::ConversionMode
mode
) const
返迴
true
if Qt Multimedia can encode or decode this format, depending on
mode
.
注意: 此函數可以被援引,通過元對象係統和從 QML。見 Q_INVOKABLE .
返迴 MIME 類型 for the file format used in this media format.
Resolves the format, based on flags , to a format that is supported by QMediaRecorder .
This method tries to find the best possible match for unspecified settings. Settings that are not supported by the recorder will be modified to the closest match that is supported.
When resolving, priority is given in the following order:
將音頻編解碼器設為 codec .
注意: setter 函數對於特性 audioCodec .
另請參閱 audioCodec () 和 QMediaFormat::AudioCodec .
Sets the video codec to codec .
注意: setter 函數對於特性 videoCodec .
另請參閱 videoCodec () 和 QMediaFormat::VideoCodec .
[invokable]
QList
<
QMediaFormat::AudioCodec
> QMediaFormat::
supportedAudioCodecs
(
QMediaFormat::ConversionMode
m
)
Returns a list of audio codecs for the chosen file format and video codec ( m ).
To get all supported audio codecs, run this query on a default constructed QMediaFormat .
注意: 此函數可以被援引,通過元對象係統和從 QML。見 Q_INVOKABLE .
另請參閱 QMediaFormat::ConversionMode .
[invokable]
QList
<
QMediaFormat::FileFormat
> QMediaFormat::
supportedFileFormats
(
QMediaFormat::ConversionMode
m
)
Returns a list of file formats for the audio and video codec indicated by m .
To get all supported file formats, run this query on a default constructed QMediaFormat .
注意: 此函數可以被援引,通過元對象係統和從 QML。見 Q_INVOKABLE .
另請參閱 QMediaFormat::ConversionMode .
[invokable]
QList
<
QMediaFormat::VideoCodec
> QMediaFormat::
supportedVideoCodecs
(
QMediaFormat::ConversionMode
m
)
Returns a list of video codecs for the chosen file format and audio codec ( m ).
To get all supported video codecs, run this query on a default constructed MediaFormat.
注意: 此函數可以被援引,通過元對象係統和從 QML。見 Q_INVOKABLE .
另請參閱 QMediaFormat::ConversionMode .
[noexcept]
void
QMediaFormat::
swap
(
QMediaFormat
&
other
)
Swaps the media format with other .
Returns the video codec used in this format.
注意: Getter function for property videoCodec.
另請參閱 setVideoCodec () 和 QMediaFormat::VideoCodec .
[static invokable]
QString
QMediaFormat::
videoCodecDescription
(
QMediaFormat::VideoCodec
codec
)
Returns a description for codec .
注意: 此函數可以被援引,通過元對象係統和從 QML。見 Q_INVOKABLE .
[static invokable]
QString
QMediaFormat::
videoCodecName
(
QMediaFormat::VideoCodec
codec
)
Returns a string based name for codec .
注意: 此函數可以被援引,通過元對象係統和從 QML。見 Q_INVOKABLE .
返迴
true
if
other
is not equal to the current media format, otherwise returns
false
.
[noexcept]
QMediaFormat
&QMediaFormat::
operator=
(
QMediaFormat
&&
other
)
移動 other 到此 QMediaFormat 對象。
[noexcept]
QMediaFormat
&QMediaFormat::
operator=
(const
QMediaFormat
&
other
)
拷貝 other 到此 QMediaFormat 對象。
返迴
true
if
other
is equal to the current media format, otherwise returns
false
.