Qvideoframe qt: fc37. pro 文件中 パブリックタイプ 公的機能 詳細な説明 QVideoFrame は、ビデオフレームのピクセルデータとフレームに関する情報をカプセル化します。 ビデオフレームは、デコードされたメディア、カメラ、またはプログラムで生成された複数の場所から取得できます。これらのフレームでのピクセル I've used QVideoProbe to access camera frames. Qt 有一个私有函数 qt_imageFromVideoFrame 用于将 QVideoFrame 转换为 QImage 。 If you want to use it, you'll need to:如果你想使用它，你需要： Add QT += multimedia multimedia-private to your . can i convert QVideoFrame straight to QPixMap or other faster way to showing camera frames? here is my code: QCamera *camera = QAbstractVideoFilter serves as a base class for classes that are exposed to the QML world and are instantiated from there. 我正在尝试使用QCamera从相机获取图像。. I want to render video frame which is received from VIDIOC_DQBUF in qt using QVideoFrame. 我用跨平台Qt 创建了一个应用程序，在这个应用程序上，我需要在两个不同的屏幕上显示一个QCamera 的结果。 这涉及在同一个QCamera 上链接两个QCameraViewFinder。. 如何将cairo-pdf转换为eps，而无需将字体转换为轮廓 ; 22. Qt has a private function qt_imageFromVideoFrame for converting QVideoFrame to QImage . 播放状态2. 在很多方面，它是一个新的 API 和实现，即使我们重新使用了 Qt 5. achieve: A custom class inherits from QAbstractVideoSurface. 0. 如何使用FFMPEG将视频转换为flv并将其转换为flv？ 21. 2-1 Property Value; Operating system: Linux: Distribution: KaOS: Repository: KaOS Build x86_64 Official: Package filename: qt5-multimedia-5. Returns true if the settings objects are of equal value, and false if they are not of equal value. List of all members, including inherited members Public Types Public Functions Detailed Description Introducing video filters in Qt Multimedia. Vous pouvez noter les exemples pour nous aider à en améliorer la qualité. The output elements such as the VideoOutput and the QVideoWidget have a QVideoSink so you should not create one but write over that QVideoSink: #ifndef PRODUCER_H #define PRODUCER_H #include <QObject> #include <QPointer> #include <QVideoSink> #include <QQmlEngine> #include <QTimer> class Producer The QVideoFrame class represents a frame of video data. See also isMirrored(). Qt Multimedia 是一个模块，它在 Qt 6 中发生了一些相当大的变化。. It is not supposed to be instantiated directly. 有时候需要在视频上画图，所以需要能获取到每一帧视频数据。以前从视频文件或视频流中得到帧，一般都是使用qt + ffmpeg或qt + vlc。qt对显示处理视频大体有以下方法：1. h" 放入您的代码中以使该功能可用. QT版本: 5. 5. 我的代码是： QCameraViewFinder* viewfinder = new QCameraViewFinder(); QCamera* camera = new QCamera(); viewfinder->setSizePolicy(QSizePolicy::Maximum,QSizePolicy::Maximum); camera Just another thing, if someone more experienced with PyQt5 can save me a tons of time and show me how can I place this video player in my GUI program easiest way? KLayout Documentation (Qt 5): Main Index » Class Index » API reference - Class QVideoFrame_PixelFormat API reference - Class QVideoFrame_PixelFormat. import QtQuick 2. 另请参阅 handleType (). Android系统: Android 8. 我以为我应该从 QAbstractVideoSurface 派生并实现 present () ，其中 QVideoFrame 代表相机捕获的当前图像作为参数发送。. QMediaPlayer + QVideoWidget. 2. So Qt release is 5. If a video output has already been set on the media player the new surfaces will replace it. cpp Project: KDE/android-qt-mobility. 3 as published by the Free Software Foundation. Why not support video capture in the windows, the official gives the answer: Translation: Windows of Qt Multimedia can be achieved through two plug-ins. Here are some examples of what can be done with Qt Multimedia APIs: Access raw audio devices for input and output. 0 beta 1). Qt, Qt Quick and the supporting tools are developed as an open source project governed by an inclusive meritocratic model. The way pixels are described in these frames can vary greatly, and some pixel formats offer greater compression opportunities at the expense of ease of use. QVideoFrameFormat describes the type of the frames and determines how they should be presented. RHI is Qt's internal graphics abstraction for 3D APIs, such as OpenGL, Vulkan, Metal, and Direct 3D. Sets the horizontal and vertical elements of a video stream's Tested on Windows 8 with Qt 5. ** Foundation and appearing in the file LICENSE. 8 qt opengl; Qt环境损坏Mac os qt; Qt 图形视图中的QVideoWidget qt video; 从mirth connect-tcp服务器qt creator读取数据 QT MediaPlayer是一个很好用的QT自带的原生多媒体播放器，它的用法可以看相关文档即可，但要在windows下使用的话需要安装解码器，例如 ：LAV Filters。 今天这篇文章我们分为两部分来讲，一是利用MediaPlayer得到视频的每一帧。 android - QVideoFrame::map ()崩溃. noarch. h" into your code to make the function available. Put #include "private/qvideoframe_p. Drawing qt5采集摄像头的视⾳频. 2 setFrame(const QVideoFrame &frame) 判断frame的图像格式，是否与设置的一致 不同，在Android上相机有多个通道，预览和拍照走不同的通道来实现，可分别控制。但是qt在嵌入式下的平台上只有一个通道，所以基本实现不了预览和拍照分辨率的相互切换。 有时候需要在视频上画图，所以需要能获取到每一帧视频数据。. avi from OpenCV as example) and QT camera. 14版本更新细节 QVideoFrame::Format_YUV422P 。 引入了对GStreamer OpenGL插件的支持 。 Qt网络 HTTP/2配置API。 网络连接监控。 [QTBUG-1538]支持Kerberos代理身份验证。 Qt QML 添加了 Qt QMEDiaplayer + QABSTractVIDEOSURFACE Enables low CPU usage to play local video and intercept frame images. C++ (Cpp) QVideoFrame - 30 examples found. I've compiled QT 4. 实时转换为yuv420p，并分别将视频与⾳频分别保存为yuv⽂件和pcm⽂件。. Description: This class represents the QVideoFrame::FieldType enum. QMediaCaptureSession captureSession; camera = new QCamera ; captureSession. rpm: /usr/src/debug/PyQt4-4. Due to the close integration with the final stages of the Qt Multimedia video pipeline, accelerated and possibly zero-copy solutions are feasible too: for instance, a plugin providing OpenCL-based algorithms can use OpenCL's OpenGL interop to use the OpenGL textures created by a hardware accelerated video decoder, without additional readbacks This function was introduced in Qt Mobility 1. Hope I am correct and it help. Play low latency sound effects. 海思视频和QT的Colorkey显示模式. The contents of a video frame can be mapped to memory using the map () function. 0 import QtMultimedia 5. Here is how to go. This class is equivalent to the class QVideoFrame::FieldType. 2 was not found. 这种方法只适合简单的显示视频功能，不适合对视频进行处理 C++ (Cpp) QImage::save - 30 examples found. commitData: QAbstractItemDelegate QAbstractItemView. These are the top rated real world C++ (Cpp) examples of QVideoFrame::isValid extracted from open source projects. I have an implementation of using pyzbar in my PySide6 project along side OpenCV that works. 13. Alternatives. 以前从视频文件或视频流中得到帧，一般都是使用qt + ffmpeg或qt + vlc。. 如何以图像或类似方式访问特定的帧。. QImage显示时程序崩溃. From that point on, every video frame the VideoOutput receives is run through the filter first. Qt quazip:：getFileNameList的QStringList通过销毁来强制转换错误 qt; Qt 如何在QWebFrame中注入Javascript？ qt; Qt QVideoFrame未找到此类文件或目录 qt; 用qt5. void QVideoSurfaceFormat:: setPixelAspectRatio (int horizontal, int vertical). This function was introduced in Qt The QImageCapture class is a high level images recording class. On windows: Qt camera very slow (6x times) against builtin OpenCV camera. Sample VideoFilters I've implemented a number of image filters for The barcode logic is the culprit. Qt has a rich set of ready-to-use multiplatform components for diverse areas such as multimedia, network and connectivity, graphics, input methods, sensors, data storage and more. ** General Public License version 3 as published by the Free Software. Constructor QVideoFrame::QVideoFrame(QAbstractVideoBuffer *buffer, const QSize &size, QVideoFrame::PixelFormat format) new QVideoFrame: new (int bytes, const QSize size, diff --git a/src/multimedia/video/qvideoframe. (const QAVVideoFrame &frame) { // QAVVideoFrame is comppatible with QVideoFrame QVideoFrame videoFrame = frame; // QAVVideoFrame can be converted to various pixel formats auto convertedFrame = frame. cpp:1042 #2 0x00007fffd8e33553 in QImageWriter::write (QImage const &) ( this Well Qt does NOT support grayscale. 核心就是：在摄像头的视频流上绘制人脸框、性别、年龄等等。. V4L2 driver will get video frame from FPGA device, so it is a raw video without any header and encoding. Go to line L. 当我需要进行一些处理时，我尝试 The PySide. 我的最终目标是将视频格式化为大小为 [帧数，视频宽度，视频高度，通道]的4维张量。. KLayout Documentation (Qt 5): Main Index » Class Index » API reference - Class QVideoFrame::QFlags_FieldType. I'm working on a QML Qt6. A PySide. For Android, using the GLTextureHandle to obtain a QImage. 好在当时是使用openCV来捕获摄像头，后面在绘图 7、配置错误： The Qt D-Bus module cannot be enabled because libdbus-1 version 1. 4 Item {width: 1280 height: 720 Camera {id: camera} VideoOutput {id: viewfinder width: parent. 如何在QImage的 ; 20. This is the Windows version of Qt, for use in conjunction with the Fedora Windows cross-compiler. A QVideoFrame encapsulates the pixel data of a video frame, and information about the frame. 15 中的一些代码。. 在一些传统应用中，如果想使用 Qt 在 QWidget 或者 QML 中显示自定义的视频数据流，需要引入 OpenGL 来实现。而实际 Qt 已经准备了 VideoOutput 类型可以很方便的调用系统摄像头和使用自定义数据流。在 Qt 官网中，VideoOutput 的介绍中说明，像 Stackoverflow 中的介绍，你需要这样一个类，该类用 Q_PROPERTY 宏 Android上的QtQML相机到C++QImage(QtQMLCameratoC++QImageonAndroid),我有一个基于Qt5. pc Qt quazip:：getFileNameList的QStringList通过销毁来强制转换错误 qt; Qt 如何在QWebFrame中注入Javascript？ qt; Qt QVideoFrame未找到此类文件或目录 qt; 用qt5. You can rate examples to help us improve the quality of examples. qt - 如何在Qt中为RGB888图像设置QImage像素颜色. update: ok, reproduced, and seems it is because wrong pointer is passed to QImage, ptr of an object, instead of data. Only the last, where the flag is set, returns a QVideoFrame in a: 199: format compatible with Qt. 注释： QAbstractXmlReceiver QDesignerFormWindowInterface QMimeType QTimeZone QXmlDefaultHandler QXmlFormatter QXmlLexicalHandler QXmlSerializer. The QVideoFrame class provides a representation of a frame of video data. pkg. When receiving frames using a class inheriting QAbstractVideoSurface, the present method gives always QVideoFrame frames with startTime and endTime set to -1 (default). width height: parent. On Android : I have two sources on the screen: avi video (megamind. My platform is Android. 5 myself using mingw32 and the other constructors (no params and QImage param) for QVideoFrame that I've tested compile and link correctly. They are then associated with a VideoOutput element. 将 QT += multimedia-private 放入你的 qmake . ** Alternatively, this file may be used under the terms of the GNU Lesser. 您现在可以访问具有以下签名的函数: QImage qt_imageFromVideoFrame (const QVideoFrame &frame); 使用该函数将 QVideoFrame 转换为临时 QImage ，然后从该图像创建输出 QVideoFrame 有時候需要在視訊上畫圖，所以需要能獲取到每一幀視訊資料。. The individual QVideoFrame objects can then be either mapped into memory, When a QAbstractVideoSurface is connected to a QMediaPlayer via QMediaPlayer::setVideoOutput() the QAbstractVideoSurface::present(QVideoFrame) function is used to grab frames. 8 qt opengl; Qt环境损坏Mac os qt; Qt 图形视图中的QVideoWidget qt video; 从mirth connect-tcp服务器qt creator读取数据 使用准备 在Qt中使用QCamera之前需要在pro文件中添加媒体库。 QT += mutimedia mutimediawidgets 在Vs环境下的Qt中使用QCamera时需要在进行如下配置 类别介绍 QCamera m_pCamera; 摄像头 QCameraViewFinder m_pViewfinder; 取景器，用于显示摄像头的数据 QCameraImageC QVideoFrame:: bits() 返回的 QtのVideoframeを扱うクラスにそのものズバリ QVideoFrameってクラスがあります。 このクラスを使って動画のフレームを読むと 今Format_YUV420pでした。 そこでこのFrameをOpenCVのMatに変換しようとしていますができなくて困っております。 QVideoFrame::PixelFormat QCameraImageCapture:: bufferFormat const. So reverting for now Qt Submodule Update Bot: 5 weeks: dev: QtMultimedia: replace qSwap with std::swap/member-swap where possible: Marc Mutz: 8 hours : Tag Download Author Age; tst_qvideoframe: Increase buffer sizes used in image() tests: Dmitry Shachnev: 1-4 / +4: 2021-04-06: AVFoundation: Only remove the video output if it is still attached: Andy Shaw: 1 The QAbstractVideoSurface class is a base class for video presentation surfaces. Qt Multimedia makes it very easy to get a video stream from the camera or a video file rendered as part of your application’s Qt Quick scene. 1, with MSVC 2015. My understanding is, if the data comes in a format that you don’t explicitly authorize, then the Qt framework uses the underlying system to convert the data into the format that you want. QAbstractVideoSurface 클래스를 이용해서 QMediaPlayer and QCamera의 데이터를 수신 받을수도 있습니다. 一、开发环境搭建. 1 优化QPainter绘图并将QVideoFrame直接转换为QPixMap - Optimizing QPainter drawing & Converting QVideoFrame straight to QPixMap . What is more, its modularized backend and video node plugin system allows to provide hardware accelerated, zero copy solutions on platforms where such an The QVideoSink class can be used to retrieve video data on a frame by frame basis from Qt Multimedia. Sets a video stream's pixel aspect ratio. 1 Answer1. Show activity on this post. Qt can be used commercially via dynamic linking (LGPL v3) or custom commercial terms with the Qt Company. See also pixelAspectRatio(). The video pixel data in a QVideoFrame is encapsulated in a QAbstractVideoBuffer . It always captures images with 320x240 resolution. qt - 優化QPainter繪圖&將QVideoFrame直接轉換為 QPixMap . Use a camera, including viewfinder, image capture KLayout Documentation (Qt 5): Main Index » Class Index » API reference - Class QVideoFrame_QFlags_PixelFormat. map () function. Video frames can come from several places - decoded media ， camera , or generated programmatically. QObject::connect: Cannot queue arguments of type 'QTextCursor'. The second one could be unnecessary if you use video filters for other purposes, but here there is a possibility to scan the selected part of the screen and for this rectangle, a parameter is used. From looking at the QT sources there is nothing that stands out as different for this constructor for it to not be included in the library. Any help would be greatly appreciated. cpp, we create a QRCodeFilter class, a QRCodeFilterRunnable class and a QRCodeFilterResult class. 有关我的问题的一些背景信息。 我的目标是优化来自网络摄像头的图像绘制，这些图像作为QVideoFrame出现，当前已加载到QImage中并从那里绘制。 (As it's a linker issue, I'm presuming you won't want code examples). FFMPEG的开发环境部署比如容易，在官网下载库文件，然后在QT里面指定路径，把相关dll文件放到exe目录下就可以了，不需要根据开发工具重新编译。. This is a separate class to VideoWidget as both QAbstractVideoSurface and The QVideoSurfaceFormat class specifies the stream format of a video presentation surface. Documentation contributions included herein are the copyrights of their respective owners. 获取媒体元数据3. 11 on Windows 8. Then you can access the channels and everything from the QVideoFrame and draw the frame on a widget. This function was introduced in Qt Mobility 1. When a new frame arrives, it is (rather) simply drawn onto the QLabel that was added to the QFrame. See also setBufferFormat(), supportedBufferCaptureFormats(), and setBufferCaptureFormat(). Qt Multimedia is a module that has undergone some rather large changes for Qt 6. This class is equivalent to the class Generated while processing qtmultimedia/src/qtmultimediaquicktools/qdeclarativevideooutput_render. Note Since video frames can be expensive to copy, QVideoFrame is explicitly shared, so any change made to a video frame will also apply to any copies. QVideoProbe:: ~QVideoProbe Destroys this probe and disconnects from In this post I’ll describe how to combine the power of Qt and OpenCV to develop a good looking and fun object detector. Once QMediaPlayer::setPosition(int) was called, the QVideoFrames which arrive in the present() function do not contain correct startTime() and endTime() (They seem to I'm on OS playing a MP4 file, using QAbstractVideoSurface::present (), but it fails for me. Use _create instead KLayout Documentation (Qt 5): Main Index » Class Index » API reference - Class QVideoFrame_FieldType API reference - Class QVideoFrame_FieldType. 200: 201: Filters that want to expose the results of their computation to Javascript: 202: code in QML can declare their own custom signals in the Free and open-source Qt Media Player library based on FFmpeg, for Linux, Windows, macOS, iOS and Android. So, I need to run the Qt maintenance tool to install Qt 5. 本程序是通过使⽤QT+VS2010调⽤windows摄像头，QCamera采集视频帧，通过QAudioInput采集⾳频，将采集的视频格式RGB32通 过传递内存使⽤ffmpeg将RGB32. Device support UYVY,NV12,RGBA,RGB24, NV21 and some other color This class was introduced in Qt 4. Dies sind die am besten bewerteten C++ (Cpp) Beispiele für die QDebug, die aus Open Source-Projekten extrahiert wurden. I's failing to map frames. Cotter Fri, 09 Jul 2021 08:32:13 -0700 the correct implementation is this: (note it still does one extra copy, i do not know how to remove that) For non-Android, using Qt's qt_imageFromVideoFrame () to convert a QVideoFrame to a QImage. 21. 该源码 我用跨平台Qt 创建了一个应用程序，在这个应用程序上，我需要在两个不同的屏幕上显示一个QCamera 的结果。 这涉及在同一个QCamera 上链接两个QCameraViewFinder。. While mapped the video data can accessed using the bits () function which returns a pointer to a buffer Member Function Documentation QVideoProbe:: QVideoProbe (QObject *parent = Q_NULLPTR) Creates a new QVideoProbe class with parent. x86_64 /usr/src/debug/PyQt4-4. 虽然我们试图为我们 QT+FFMPEG实现视频播放. QVideoFrame. 我的代码是： QCameraViewFinder* viewfinder = new QCameraViewFinder(); QCamera* camera = new QCamera(); viewfinder->setSizePolicy(QSizePolicy::Maximum,QSizePolicy::Maximum); camera QT += sql Qt附加模块 Qt 附加模块可以实现一些特定目的。 这些模块可能只在某些开发平台上有，或只能用于某些操作系统，或只是为了向后兼容。 用户安装时可以选择性地安装这些附加模块。 表 2 是附加模块列表（未列出一些过时的模块，以及专门用于 QML 或 Qt Quick 的模块）。 增值模块 除了随 Qt 5 发布的上述这些模块，还有一些模块（见表 3)是单独发布的，这些模块只在商 Qt 6. By using a snippet from histogram class from the player example provided by Qt I was able to read each Go to file. 我正在创建一个程序来播放视频，然后对其进行处理。. 开发环境：MinGW+QT5. Qt中，QRgb是unsigned int的别名 Qt中用一个unsigned int存储像素值，格式为0xFFRRGGBB QT转换16位QImage为8位无符号字符在QT ; 17. The contents of a video frame can be mapped to memory using the PySide. #include <QAbstractVideoSurface> #include <QGuiApplication> #include <QMediaPlayer> #include <QVideoSurfaceFormat To: ***@qt-project. 这是加载我 Qt quazip:：getFileNameList的QStringList通过销毁来强制转换错误 qt; Qt 如何在QWebFrame中注入Javascript？ qt; Qt QVideoFrame未找到此类文件或目录 qt; 用qt5. 14版本更新细节 QVideoFrame::Format_YUV422P 。 引入了对GStreamer OpenGL插件的支持 。 Qt网络 HTTP/2配置API。 网络连接监控。 [QTBUG-1538]支持Kerberos代理身份验证。 Qt QML 添加了 QT MediaPlayer It's a very useful QT Native multimedia player , Its usage can be seen in relevant documents , But we need to windows If you use it under, you need to install the decoder , for example ：LAV Filters. The "100 nanoseconds" is the default WMF unit, so a simple conversion is needed in MFTransform::makeVideoFrame (file mftvideo. Features Here are some examples of what can be done with Qt Multimedia APIs: Access raw audio devices for input and output Qt Location; Qt Multimedia Added QVideoFrame::Format_YUV422P. Copy permalink. According to A QVideoFrame encapsulates the pixel data of a video frame, and information about the frame. 3. 14版本更新细节 QVideoFrame::Format_YUV422P 。 引入了对GStreamer OpenGL插件的支持 。 Qt网络 HTTP/2配置API。 网络连接监控。 [QTBUG-1538]支持Kerberos代理身份验证。 Qt QML 添加了 Properties 公共职能 重新实现的公共功能 Signals 详细说明 将 QGraphicsVideoItem 附加到QMediaPlayer或QCamera允许它显示该媒体对象的视频或图像输出。 注意：一次只能将一个显示输出附加到媒体对象。 另请参阅QMediaPlayer、QVideoW QVideoFrame objects can consume a significant amount of memory or system resources and should not be held for longer than required by the application. 12. c++ - 带线程的运算符++(前缀) c++ - 游戏状态管理器 : how to point to and update current state. 1. 3-20. In my Windows Qt environment, I only installed Qt 6. The core properties of a video stream required to setup a video sink are the pixel format given by pixelFormat (), and the frame dimensions given by frameSize (). Qt::Alignment alignment(void) QColor gridLineColor(void) QPen gridLinePen(void) void hide(void) bool isGridLineVisible(void 我用跨平台Qt 创建了一个应用程序，在这个应用程序上，我需要在两个不同的屏幕上显示一个QCamera 的结果。 这涉及在同一个QCamera 上链接两个QCameraViewFinder。. Over 90 percent of questions asked here gets answered. 19. (Make sure 'QTextCursor' is registered using qRegisterMetaType (). This allows to expose a QObject as a singleton to QML, without having to The VideoWidgetSurface class inherits QAbstractVideoSurface and paints video frames on a QWidget. QAbstractVideoBuffer will allow you to construct video frames from preallocated or static buffers. 6. 解决方法. rpm: 5. These are the top rated real world C++ (Cpp) examples of QImage::save extracted from open source projects. 视频采集设置每⼀帧数据 Example: QVideoFrame convertFormat (const QVideoFrame &inputframe, QVideoFrame::PixelFormat outputFormat) { // What comes here? } //Usage QVideoFrame converted = convertFormat (mySourceFrame, QVideoFrame::Format_RGB32); I found a solution that is built into Qt5 , but UNSUPPORTED BY Qt . 11. frames are showned very slowly. List of all members, including inherited members Public Types Public Functions Static Public Members Detailed Description The QVideoFrame class 17. 14. Video frames can come from several places - decoded media , a camera , or generated programmatically. yuv格式具有亮度信息和色彩信息分离的特点，但大多数图像处理操作都是基于rgb格式。因此当要对图像进行后期处理显示时，需要把yuv格式转换成rgb格式。rgb与yuv的变换公式如下： yuv(256 csdn已为您找到关于QVideoFrame 中的图像数据在哪里相关内容，包含QVideoFrame 中的图像数据在哪里相关文档代码介绍、相关教程视频课程，以及相关QVideoFrame 中的图像数据在哪里问答内容。为您解决当下相关问题，如果想了解更详细QVideoFrame 中的图像数据在哪里内容，请点击详情链接进行了解，或者 Qt：在QCamera上绘图（QCamera as background）. 1/9. Module: QtMultimedia. 14版本更新细节 QVideoFrame::Format_YUV422P 。 引入了对GStreamer OpenGL插件的支持 。 Qt网络 HTTP/2配置API。 网络连接监控。 [QTBUG-1538]支持Kerberos代理身份验证。 Qt QML 添加了 . While mapped the video data can accessed using the bits () function which returns a pointer to a buffer, the total size of which is given by the mappedBytes (), and the size of QVideoFrame objects can consume a significant amount of memory or system resources and should not be held for longer than required by the application. Adding a filter to get the video frame In main. 将 #include "private/qvideoframe_p. 我的代码是： QCameraViewFinder* viewfinder = new QCameraViewFinder(); QCamera* camera = new QCamera(); viewfinder->setSizePolicy(QSizePolicy::Maximum,QSizePolicy::Maximum); camera This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. 主要为通过查询QVideoFrame::imageFormatFromPixelFormat接口获得QImage格式对照表。 对照表 Format_ARGB32 Format_ARGB32_Premultiplied Format_RGB32 Format_RGB24 Format_RGB565 Format_RGB555 Format_ARGB8565_Premultipl 我已经使用QVideoProbe来访问相机框架。 我的平台是Android。 我已经将每个相机帧转换为QImage ，然后像素图并显示在QLabel 。 我的问题是这个过程很慢。 帧显示非常缓慢。 我可以直接将QVideoFrame转换为QPixmap或其他更快的方式来显示相机的帧？这里是我的代码： Qt 5. This function was introduced in Qt Properties 公共职能 重新实现的公共功能 Signals 详细说明 将 QGraphicsVideoItem 附加到QMediaPlayer或QCamera允许它显示该媒体对象的视频或图像输出。 注意：一次只能将一个显示输出附加到媒体对象。 另请参阅QMediaPlayer、QVideoW 该软件里推流和视频保存使用FFMPEG库完成，界面框架采用QT，视频和音频可以同步推流和录制，FFMPEG本身支持跨平台编译开发，QT也支持跨平台，在Android、Linux、windows都运行良好，只需要在不同平台编译对应的ffmpeg库即可，逻辑代码部分通用。. QMediaPlayer + QAbstractVideoSurface. [signal] void QCameraImageCapture:: bufferFormatChanged (QVideoFrame::PixelFormat format) Signal emitted when the buffer format for the buffer image capture has changed. Play media files in playlists (such as compressed audio or video files) Record audio and compress it. Because we can easily answer the last part already: "You don't need a The VideoWidgetSurface class inherits QAbstractVideoSurface and paints video frames on a QWidget. 1. pro file. 我的代码是： QCameraViewFinder* viewfinder = new QCameraViewFinder(); QCamera* camera = new QCamera(); viewfinder->setSizePolicy(QSizePolicy::Maximum,QSizePolicy::Maximum); camera QT软件开发-第八章 多媒体开发，8. Tune and listen to radio stations. Features. 您现在可以访问具有以下签名的函数:QImage qt_imageFromVideoFrame(const QVideoFrame &frame); 使用该函数将 QVideoFrame 转换为临时 QImage，然后从该图像创建输出 Qt 5. None of the QImage::Formats are gray. There is an issue with QCameraImageCapture in Qt Mobility 1. tar. Cross-platform software development at its best. cpp Qt 5. In 4. ©2022 The Qt Company Ltd. 4的程序，带有一些图像处理功能。我使用QCamera和我的videoSurface（源自QAbstractVideoSurface）来获取VideoFrames PyQt5 Access Frames with QmediaPlayer. Package Version Arch Repository; mingw32-qt5-qtmultimedia-5. qt对显示处理视频大体有以下方法：. Ce sont les exemples réels les mieux notés de QVideoFrame extraits de projets open source. 我可以用播放视频 QMediaPlayer 。. In the supportedPixelFormatsmethod, you describe to the rest of the framework which types of QVideoFrame data formats that your implementation can support. Code Browser 2. 3. 9+FFMPEG20190212. To review, open the file in an editor that reveals hidden Unicode characters. QVideoSink can operate in two modes. 'QT/Qt Multimedia 공부하기' Related Articles 以下内容是CSDN社区关于QImage显示时程序崩溃相关内容，如果想了解更多关于Qt社区其他内容，请访问CSDN社区。 社区 Qt 帖子详情. . While mapped the video data can accessed using the bits () function which returns a pointer to a buffer Generated on 2019-Aug-01 from project qtmultimedia revision v5. 变换一个YUV420P QVideoFrame为灰度的OpenCV垫 ; 19. QVideoFrame class provides a representation of a frame of video data. Copy path. cpp index 7840eda31. QMediaPlayer + QVideoWidget这种方法只适合简单的显示视频功能，不适合对视频进行处理（比 According to Qt doc a video sink (qvideosink) is loaded on the fly and gst opengl support should be enabled by setting environment variable QT_GSTREAMER_USE_OPENGL_PLUGIN=1, thus adding a new pad capability video-x/raw (memory:GLMemory) to the element. 44 lines (38 sloc) 1. 18. Here is how to go about: Put QT += multimedia-private into your qmake . ) 2. QVideoFrame_QFlags_FieldType ~ Returns the inverted flag set: Deprecated methods (protected, public, static, non-static and constructors) void: create: Use of this method is deprecated. Fichier : tst_qvideoframe. Everything is compiled with our specific Yocto layer along with OpenSTLinux 2. 0 Qt quazip:：getFileNameList的QStringList通过销毁来强制转换错误 qt; Qt 如何在QWebFrame中注入Javascript？ qt; Qt QVideoFrame未找到此类文件或目录 qt; 用qt5. API reference - Class QVideoFrame. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1. com Content of RPM PyQt4-debugsource-4. I'm using Qt 5. clear_layout All video surfaces must support at least one shared QVideoFrame::PixelFormat . You can subclass this interface to receive video frames from sources such as decoded media or cameras to perform your own processing. org Sent: Friday, March 14, 2014 11:29 AM Subject: [Interest] QVideoFrame and YUV question Hi, I'm trying to create a QImage from a QVideoFrame but my video has YUV420P format so converting it's not easy for me at all. A QVideoFrame encapsulates the pixel data of a video frame, and information about the frame. "then" in the message about unmap should be "than". In order to fix it you must modify directshow plugin sources. 订阅 qvideoframe. 4-1-x86_64. but this is the new and crucial information in order to properly reply to your "What is the fastest way to convert a QVideoFrame to a QImage (which should be a greyscale non-indexed image". Properties 公共职能 重新实现的公共功能 Signals 详细说明 将 QGraphicsVideoItem 附加到QMediaPlayer或QCamera允许它显示该媒体对象的视频或图像输出。 注意：一次只能将一个显示输出附加到媒体对象。 另请参阅QMediaPlayer、QVideoW 我用跨平台Qt 创建了一个应用程序，在这个应用程序上，我需要在两个不同的屏幕上显示一个QCamera 的结果。 这涉及在同一个QCamera 上链接两个QCameraViewFinder。. 15 引入。 另请参阅 QAbstractVideoSurface::supportedPixelFormats . Tune and listen to radio stations, and receive radio program information. See also supportedBufferFormats() and setBufferFormat(). 原文 标签 android c++ qt opengl-es android-ndk. Felgo and Qt are wonderful tools for multiplatform applications. enum QVideoFrame:: Re: [Interest] Qt6: how to construct QVideoFrame from QImage ? David M. 这学期学数图，作业需要做界面，于是开始学习Qt。 QRgb. 经过进一步检查发现原因是Qt中带参数的信号如果在线程中被发送，那么必须放入队列里面，由于QTextEdit是Qt库自带的，改起来不方 The hardware is a STM32MP157C SoC which provides a Vivante GCnano as GPU. zst AbstractAxis Class¶ Parameters : void. setCamera (camera); QVideoWidget * preview = new QVideoWidget (); preview -> show Qt is a cross-platform application and UI framework for developers using C++ or QML, a CSS & JavaScript like language. Qt Multimedia offers APIs for doing many multimedia related tasks: Accessing raw audio devices for input and output. convert(AV_PIX_FMT_YUV420P); // Easy To recognize QR code, we need to obtain the video frame by adding a filter. Description: This class represents the QVideoFrame::PixelFormat enum. 1) pixelF = QVideoFrame:: Format_RGB24; actualFormat = QVideoSurfaceFormat (m_windowSize, pixelF); c++ - QT中未初始化的指针. 该函数在 Qt 5. 16. This can be useful for rendering large font sizes which would otherwise consume a lot of texture memory. cpp b/src/multimedia/video/qvideoframe. We create a simple camera view in main. h" 放入代码中以使该功能可用。. 如果仅仅是显示，不处理就很简单，这里 Qt 中获取摄像头图像数据的方法 在 Qt 中提供了 QCamera 类用来操做摄像头。（这里的摄像头指的是电脑上经常使用的那种 USB 摄像头或网络摄像头，暂时还不支持工业相机。）摄像头获取的实时图像能够显示在 QCameraViewfinder 或 QGraphicsVideoItem 上，QCameraImageCapture 能够获取静态的图像，QMediaRecorder 能够 如上文所提到的，利用Qt提供的QCamera等类，如果仅仅为了实现摄像头画面的显示，那么几句代码就可以实现了。. The QAbstractVideoSurface class defines the standard interface that video producers use to inter-operate with video presentation surfaces. Надеюсь, к релизу это поправят. ** GNU Lesser General Public License Usage. The Qt-5. qml:. . _LinGM 2018-04-13 11:39:34. Returns the buffer image capture format being used. Qt 5. height source: camera}}. c++ - 错误 LNK2019 - 抽象类中的 在下文中一共展示了QVideoFrame类的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。 Properties 公共职能 重新实现的公共功能 Signals 详细说明 将 QGraphicsVideoItem 附加到QMediaPlayer或QCamera允许它显示该媒体对象的视频或图像输出。 注意：一次只能将一个显示输出附加到媒体对象。 另请参阅QMediaPlayer、QVideoW Qt 提供多媒体支持通过 Qt Multimedia 模块。Qt Multimedia 模块提供丰富特征集，使您能够轻松利用平台的多媒体能力 (如：媒体回放及使用摄像头 无线电设备)。 QVideoFrame 表示视频数据帧 QVideoProbe 允许监视视频帧播放或录制 QVideoSurfaceFormat 指定视频呈现表面的流 在一些传统应用中，如果想使用 Qt 在 QWidget 或者 QML 中显示自定义的视频数据流，需要引入 OpenGL 来实现。 代码中使用了 QVideoFrame 的第二个构造函数，先根据视频数据大小创建一个空闲位置，然后 map 这块位置到内存，拷贝数据进去，最后 unmap 并发送信号给 This package contains the Qt software toolkit for developing cross-platform applications. 8. QMediaCaptureSession has two things related to video: setVideoSink setVideoOutput With the sink, you paint whatever you want on the frame and after that, it will be shown for you on the video widget. commit: QInputMethod QSaveFile QScopedValueRollback QSqlDatabase QTest::QTouchEventSequence. ** Licensees holding valid commercial Qt licenses may use this file in: 11 ** accordance with the commercial license agreement provided with the: 12 ** Software or, alternatively, in accordance with the terms contained in QVideoFrame(QAbstractVideoBuffer *buffer, const QSize &size, PixelFormat format); 115: The QVideoFrame class provides a representation of a frame of video data. Sie können Beispiele bewerten, um die Qualität der Beispiele zu verbessern. You connect the videoFrameChanged signal on a slot, in the slot paint on it and you should be done. 8 qt opengl; Qt环境损坏Mac os qt; Qt 图形视图中的QVideoWidget qt video; 从mirth connect-tcp服务器qt creator读取数据 带有QmediaPlayer的PyQt5访问框架. However, other issues were found on the PC the frame returned is upside down, and the RGB32 Image just renders a white frame. 3686400bytes is returned from both functions. 从IplImage结构转换为QImage的Qt中 ; 18. 比如: 捕获数据之后传递给opencv实现图像识别、传递给ffmpeg实现MP4保存录制、或者实现rtsp实时推流。. Qt Network HTTP/2 configuration API; Network connectivity monitoring Support Kerberos Proxy Authentication; Qt QML Added qmlRegisterSingletonInstance function. Qt is the faster, smarter way to create innovative devices, modern UIs & applications for multiple screens. 注意 (RHI). void QVideoSurfaceFormat:: setPixelAspectRatio (const QSize &ratio). To get an instance of QImage object form QVideoFrame we implemented a custom static method that requires QVideoFrame and QRect as parameters. self. Go to file T. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. LGPL3 included in the. I only get to present () once. 我可以使用 QMediaPlayer 播放视频。. Use a Microsoft DirectShow API, and the other using WMF (Windows Media Foundation) framework. Qt has a rich set of ready-to-use multiplaform components for diverse areas such as multimedia, network and connectivity, graphics, input methods, sensors, data storage and so on. This class was introduced in Qt 4. 在 https://ffmpeg. If there is any additional information you need i'm happy to provide it. c++ - 如何翻转 QImage. cpp Generated on 2019-Aug-01 from project qtbase revision v5. Welcome to Qt Centre. Today's article is divided into two parts , One is to make use of MediaPlayer Get every frame of the video . 主要为通过查询QVideoFrame::imageFormatFromPixelFormat接口获得QImage格式对照表。 Qt 开发经验总结 原创 飞扬青云 高效程序员 3天前 图片 图片 1 开发经验 当编译发现大量错误的时候，从第一个看起，一个一个的解决，不要急着去看下一个错误，往往后面的错误都 Para conocer el tipo de manejador — algo que depende del API nativo que esté usando el módulo Qt Multimedia — se puede usar el método QVideoFrame::handleType(). 11/multimedia/video/qmlvideofilter_opencl sample demonstrates the details of how to add the filter. 3-2. x86_64. pro文件. These are the top rated real world C++ (Cpp) examples of QVideoFrame extracted from open source projects. 8 qt opengl; Qt环境损坏Mac os qt; Qt 图形视图中的QVideoWidget qt video; 从mirth connect-tcp服务器qt creator读取数据 Features. Feed the media player the needed file and eventually it will start calling QAbstractVideoSurface::present (const QVideoFrame & frame) on your implementation of QAbstractVideoSurface if the video was loaded successfully. cpp around line 638, seen in Qt 5. 主要为通过查询QVideoFrame::imageFormatFromPixelFormat接口获得QImage格式对照表。 QVideoFrame转QImage格式对照表_Qt君-程序员ITS203 - 程序员ITS203 程序员ITS203 程序员ITS203,编程,java,c语言,python,php,android To add webcam support in Qt application, we need to import the QCamera class from QtMultimedia library. I've converted each camera frames to QImage and then pixmap and show on QLabel. pro 文件中; 将 #include "private/qvideoframe_p. The camera output is VGA in UYVY format and the screen resolution is 480x800. This is a separate class to VideoWidget as both QAbstractVideoSurface and To recognize QR code, we need to obtain the video frame by adding a filter. If you are looking for information about Qt related issue — register and post your question. 2, which does not include QtMultimedia library. What you will learn If you carefully go through Continue reading "Object Detection Using Qt, C++, QML and OpenCV" KLayout Documentation (Qt 5): Main Index » Class Index » API reference - Class QVideoFrame. File: tst_qvideoframe. The method explained here contains quite a few things to learn and use in your current and future projects, so let’s get started. You now have access to a function with the following signature: QImage qt_imageFromVideoFrame (const QVideoFrame &frame); Use the function to convert the QVideoFrame to a temporay QVideoFrame 클래스는 비디오 프레임을 캡슐화하여 조작 또는 처리를 위해 시스템 메모리를 시스템 메모리에 매핑 할 수 있습니다. x. Hi3520A视频是在视频层显示的，而QT是运行在图形层，但是QT运行后会遮挡视频层的视频，因此，需要某种方法将QT视频区域隐藏然后显示后面的视频如：QT的label背景设置为紫色，然后通过硬件透色了图形层上面的紫色，那么该区域 A QVideoFrame encapsulates the pixel data of a video frame, and information about the frame. Cannot retrieve contributors at this time. Play media files in playlists (like compressed audio, or video files) Record audio and compress it. According to the Qt documentation, we can find the QCamera class in Qt 5. Video frames can come from several places - decoded media, a camera, or generated programmatically. 2 app that receives images that I would like to display to the user, I am using a VideoOutput and a QVideoSink to change the frames, however I have to convert my images to QVideoFrames before I can set them as frames for the sink, I need some help on how to do that. QAbstractVideoBuffer internally to reference a buffer of video data. I found an example of its usage, but it has nothing to do with what I want to do (displaying a QVideoFrame). 1访问系统摄像头 在Qt5中，多媒体由QtMultimedia模块提供支持。Phonon框架不再是Qt的一部分，但它仍然由Phonon开发人员维护并支持Qt5。 在QT5中，QCamera类为系统摄像头设备提供接口。 QCamera可与QCameraViewfinder一起用于取景器显示，QMediaRecorder用于视频录制，QCameraImageCapt В текущей версии Qt он работает довольно странно: может не записать изображение в буфер (случается редко), либо, пока будет доставать его оттуда, испортить его. 0-117-gd89a4269 Powered by Code Browser 2. More #include <QVideoSurfaceFormat> This class was introduced in Qt 4. Creating a subclass of PySide. Qt Centre is a community site devoted to programming in C++ using the Qt framework. This is checked in windows task manager. This reverts commit 2b96c113cf7057b556856149114999b973b3f2c2, due to the fact that it introduces a problem with existing cameras on Windows. void QCameraImageCapture:: bufferFormatChanged ( QVideoFrame::PixelFormat format) [signal] Signal emitted when the buffer format for the buffer image capture has changed. This is an overloaded function. 8 qt opengl; Qt环境损坏Mac os qt; Qt 图形视图中的QVideoWidget qt video; 从mirth connect-tcp服务器qt creator读取数据 二、需求介绍. 15. On Linux, by QVideoProbe callback out QVideoFrame is YV12 format. 2编译openscenegraph3. 2 的第一个测试版刚刚发布，并在多个其他新附加组件中加入了全新的 Qt 多媒体模块。. After setting the source to monitor with setSource(), the videoFrameProbed() signal will be emitted when video frames are flowing in the source media object. 有一帧图像QVideoFrame frame；构造成QImage类型 将 QT += multimedia-private 放入您的qmake . QVideoFrame class makes use of a PySide. （1）下载工具. 這種方法比較 Felgo and Qt are wonderful tools for multiplatform applications. 几年前在某家人脸识别公司工作时，做了几个演示用的demo（FaceView），其中大量用到了绘图方面的Qt方法。. x86_64/dbus /usr/src/debug On the QMainWindow lies a QFrame, of which the HANDLE is sent to the receiving thread. cpp Projet : KDE/android-qt-mobility. enum QVideoFrame:: A QVideoFrame encapsulates the pixel data of a video frame, and information about the frame. 以前從視訊檔案或視訊流中得到幀，一般都是使用qt + ffmpeg或qt + vlc。. 我的代码是： QCameraViewFinder* viewfinder = new QCameraViewFinder(); QCamera* camera = new QCamera(); viewfinder->setSizePolicy(QSizePolicy::Maximum,QSizePolicy::Maximum); camera To add webcam support in Qt application, we need to import the QCamera class from QtMultimedia library. The issue is OpenCV cannot fetch the "friendly name" of the available input devices like Qt can, only the ID which I believe is due to OpenCV using FFMPEG (which is technically fine, works great, just doesn't look as pretty). 将System. 有關我的問題的一些背景信息。 我的目標是優化來自網路攝像頭的圖像，圖像作為 QVideoFrame，當前載入到QImage中並從那裡繪製。 這個解決方案很好，但是圖形QImage在 X11 上非常慢。 繪製一幅圖像需要大約 20ms 個 I'm using Qt 4. Building QR Code Scanner for Windows Using Qt QML and C++. c++ - 如何围绕中心旋转QPixmap而不剪切图像的一部分. 解决： 参考:找到-prefix目录下的lib文件下的pkgconfig文件夹，打开dbus-1. In the first mode, it can render the video stream to a native window of the underlying windowing system. bool operator== (const QCameraViewfinderSettings &lhs, const QCameraViewfinderSettings &rhs) Determines if lhs is of equal value to rhs. While first source played - all ok, but if I run camera - avi goes slow because application slowdowns. QtMultimedia. I'm new to Qt application and I will get a video frame from V4L2 API VIDIOC_DQBUF. QVideoFrame encapsulates the data of a video frame, and information about the frame. fd7b74075 100644--- a/src/multimedia/video/qvideoframe. The current flow is When new QVideoFrame is available it's brought to subclassed QVideoWidgetSurface via VideoWidgetSurface: resent (const QVideoFrame &frame) method which calls repaint () and generates the QImage from the QVideoFrame data and draws it. 1 Generator usage only permitted with license. 使用QT本身代码在linux平台、Android平台、windows平台实时获取摄像头每一帧数据，进行处理再进行显示。比如: 捕获数据之后传递给opencv实现图像识别、 命令： QUndoStack. 2 this worked fine With Qt 5 however, the entire QMainWindow goes white when this is done. 背景 QT MediaPlayer是一个很好用的QT自带的原生多媒体播放器，它的用法可以看相关文档即可，但要在windows下使用的话需要安装解码器，例如 ：LAV Filters。今天这篇文章我们分为两部分来讲，一是利用MediaPlayer QVideoFrame 一个QVideoFrame代表的就是相机的一帧数据。 QVideoFrame::bits() 返回的是一帧图像的起始地址。 在调用bits()函数之前还要先判断frame是否map了。所谓map就是将图像数据放到CPU可以寻址的地方。 那么将一帧的数据转化为一个Mat数据的过程如下： Properties 公共职能 重新实现的公共功能 Signals 详细说明 将 QGraphicsVideoItem 附加到QMediaPlayer或QCamera允许它显示该媒体对象的视频或图像输出。 注意：一次只能将一个显示输出附加到媒体对象。 另请参阅QMediaPlayer、QVideoW C++ (Cpp) QDebug - 30 Beispiele gefunden. intermediate filters can return a QVideoFrame hosting data in the custom: 198: format. Thus, seems to be a problem on the MAC. Instead, you should subclass it to create new video surfaces. 使用QT本身代码在linux平台、Android平台、windows平台实时获取摄像头每一帧数据，进行处理再进行显示。. Qt Quick Added a PathText type, which can be used together with Qt Quick Shapes to render text as geometry and not based on distance fields or pre-rendered textures. 但是如果希望有一个Camera模块，同时有提供数据帧的接口，则需要去获取每一帧数据的方法，这样的获取不是利用定时器去实现，而应该是摄像头有 The QAbstractVideoSurface class defines the standard interface that video producers use to interact with the video presentation surface. 2 and GSTreamer release is 1. C++ (Cpp) QVideoFrame::isValid - 18 examples found. 74. The first Tiankeng: QVideoProbe; The second pit: QScreen intercepts the QVideoWidget image QVideoProbe * probe = new QVideoProbe; connect (probe, SIGNAL (videoFrameProbed (QVideoFrame)), this, SLOT (processFrame Properties 公共职能 重新实现的公共功能 Signals 详细说明 将 QGraphicsVideoItem 附加到QMediaPlayer或QCamera允许它显示该媒体对象的视频或图像输出。 注意：一次只能将一个显示输出附加到媒体对象。 另请参阅QMediaPlayer、QVideoW Property Value; Operating system: Linux: Distribution: Amazon Linux 2: Repository: Amazon Linux Core x86_64 Official: Package filename: qt5-qtmultimedia-doc-5. My problem is this process is very slow. 48 KB. 20. Click Debug to select the kit for desktop and then run the application. 0 A QVideoFrame encapsulates the pixel data of a video frame, and information about the frame. It's not intended to be used alone but for accessing the media recording functions of other media objects, like QCamera . A QVideoFrame encapsulates the data of a video frame, and information about the frame. The PySide. A QVideoFrame may be constructed from any buffer type by subclassing the QAbstractVideoBuffer class. Notation used in Ruby API documentation. #1 0x00007fff79d716b7 in QJpegHandler::write (QImage const &) ( this =0x555556ca9fa0, image= ) at qjpeghandler. This function was introduced in Qt 5. QMediaPlayer + QGraphicsVideoItem + QGraphicsScene + QGraphicsView. C++ (Cpp) QVideoFrame - 30 exemples trouvés. 0 release. pro file将 QT += multimedia multimedia-private 到您的 . List of all members, including inherited members Public Types Public Functions Static Public Members Detailed Description The QVideoFrame class provides a representation of a frame of video data. 3: noarch: Fedora Official: 文章目录播放音频播放压缩音频低延迟声音效果播放视频播放视频文件使用QMovie播放GIF文件QMediaPlayer1. Generated on 2019-Aug-01 from project qtmultimedia revision v5. zeranoe. I guess that doing it with a QVideoWidget would be much more efficient because that's the purpose of it, but I don't see how it works. Introduced support of GStreamer OpenGL plugin. 播放列表使用相机相机 QCamera Qt对音视频的播放和控制，相机拍照，收音机等多媒体应用提供了强大的支持。Qt5使用了全新的Qt Multimedia模块来实现多媒体应用，而原来Qt4 Qt下配置opencv已经成功，系统为win764位。使用的vs2010编译器。至于怎么配置好的，有其他的信息可以找到。或者改天给写出来。 为了显示图片，看有的人使用qlabel，这个就不必过多描述，除了能显示，并不能做别的事情。 我想避免重新发明整个 qt-multimedia，但我不确定如何充分利用可用的 Qt 类。 到目前为止我的想法是： 编写一个自定义媒体播放器 类，使用 ffmpeg 对视频进行解复用和解码，实现计时，使用 QAudioOutput 播放音频，生成 QVideoFrame s的流在视频上播放并将自定义数据 Linux系统: ubuntu18. API reference - Class QVideoFrame_QFlags_PixelFormat QVideoFrame_QFlags_PixelFormat ~ Returns the inverted flag set: Deprecated methods (protected, public, static, non-static and constructors) void: create: C++ Qt Project to Cartoonify an Image or Convert Image to Cartoon GUI Desktop App C OpenGL Graphics Project to Draw Cartoon Character on Command Line Full Project For Beginners C OpenGL Graphics Project to Build Homer Simpsons Hit & Run Game GUI Desktop App The Qt Multimedia module provides a rich feature set that enables you to easily take advantage of a platform's multimedia capabilities such as media playback and the use of camera and radio devices. There are 3 issues: 1. Since not able to reproduce it. 2.

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