Opencv加QOpenGLWidget 手撸视频播放器，实现自己的看片神器

Opencv加QOpenGLWidget 手撸视频播放器，实现自己的看片神器

开发环境：
VS2017+QtQt5.9.3+Opencv3.4.3

废话不多说，直接上代码

MyXVideo.h

#pragma once #include <QOpenGLWidget> #include<QTimerEvent> #include <QPaintEvent> #include "opencv2/core.hpp" #include "opencv2/imgcodecs.hpp" #include "opencv2/highgui.hpp" #include "opencv2/imgproc.hpp" #include <QImage> class XVedioWidght:public QOpenGLWidget { 
    Q_OBJECT public: XVedioWidght(QWidget *parent); virtual ~XVedioWidght(); void timerEvent(QTimerEvent*event); void slotOpenVedio(); QImage cvMat2QImage(const cv::Mat& mat); void paintEvent(QPaintEvent *e); public: cv::Mat m_mat; }; 

MyXVideo.cpp

#include "XVedioWidght.h" #include <QPainter> #include <QFileDialog> #include <QDebug> using namespace cv; VideoCapture cp; XVedioWidght::XVedioWidght(QWidget *parent):QOpenGLWidget(parent) { 
    startTimer(40); } XVedioWidght::~XVedioWidght() { 
    } void XVedioWidght::timerEvent(QTimerEvent*event) { 
    update(); } void XVedioWidght::slotOpenVedio() { 
    qDebug() << "slotOpenVedio"; QString name = QFileDialog::getOpenFileName(); if (name.isEmpty()) { 
    return; } bool bret = cp.open(name.toStdString()); if (!bret) { 
    return; } } QImage XVedioWidght::cvMat2QImage(const cv::Mat& mat) { 
    switch (mat.type()) { 
    // 8-bit, 4 channel case CV_8UC4: { 
    QImage image(mat.data, mat.cols, mat.rows, mat.step, QImage::Format_RGB32); return image; } // 8-bit, 3 channel case CV_8UC3: { 
    QImage image(mat.data, mat.cols, mat.rows, mat.step, QImage::Format_RGB888); return image.rgbSwapped(); } // 8-bit, 1 channel case CV_8UC1: { 
    static QVector<QRgb> sColorTable; // only create our color table once if (sColorTable.isEmpty()) { 
    for (int i = 0; i < 256; ++i) sColorTable.push_back(qRgb(i, i, i)); } QImage image(mat.data, mat.cols, mat.rows, mat.step, QImage::Format_Indexed8); image.setColorTable(sColorTable); return image; } default: qDebug("Image format is not supported: depth=%d and %d channels\n", mat.depth(), mat.channels()); break; } return QImage(); } void XVedioWidght::paintEvent(QPaintEvent *e) { 
    if (!cp.isOpened()) { 
    return; } cp.read(m_mat); if (m_mat.empty()) { 
    return; } QImage image = cvMat2QImage(m_mat); QPainter* painter = new QPainter; painter->begin(this); painter->drawImage(QPoint(0, 0), image); painter->end(); } 

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