QtAV环境配置

本文章主要是使用MSVC编译器，因为QtAV是依赖FFmpeg的，所以需要下载QtAV源码和QtAV-depends-windows-x86+x64；
官网地址：http://www.qtav.org/
Github 地址：https://github.com/wang-bin/QtAV

1，解压
将文件解压到同一个文件夹下：

2，修改.qmake.conf配置文件

INCLUDEPATH += $$PWD/../QtAV-depends-windows-x86+x64/include
LIBS += -L$$PWD/../QtAV-depends-windows-x86+x64/lib/x64

3.打开项目


4、分别构建Debug和Release


5.分别双击执行Debug和Release下的sdk_install.bat文件，会将QtAV编译的库和头文件，模块等都拷贝到Qt内部模块种。


6.这里需要 release下的prl文件拷贝到lib下

7、新建工程
添加三个环境变量，主要是配置FFmpeg库的路径设置 CPATH 到 H:\QtCode\CSOI\CSOI\VisualizationSafety\VisualizationAVCell\QtAV-depends-windows-x86+x64\include
设置 LD_LIBRARY_PATH 到 H:\QtCode\CSOI\CSOI\VisualizationSafety\VisualizationAVCell\QtAV-depends-windows-x86+x64\bin\x64
设置 LIBRARY_PATH 到 H:\QtCode\CSOI\CSOI\VisualizationSafety\VisualizationAVCell\QtAV-depends-windows-x86+x64\lib\x64

.pro 文件中添加模块

win32:CONFIG(release, debug|release): LIBS += -L$$PWD/../../../qtav/build-QtAV-Desktop_Qt_5_12_4_MSVC2015_64bit-Release/lib_win_x86_64/ -lQtAV1
else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/../../../qtav/build-QtAV-Desktop_Qt_5_12_4_MSVC2015_64bit-Release/lib_win_x86_64/ -lQtAV1d

win32:CONFIG(release, debug|release): LIBS += -L$$PWD/../../../qtav/build-QtAV-Desktop_Qt_5_12_4_MSVC2015_64bit-Release/lib_win_x86_64/ -lQtAVWidgets1
else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/../../../qtav/build-QtAV-Desktop_Qt_5_12_4_MSVC2015_64bit-Release/lib_win_x86_64/ -lQtAVWidgets1d

.h

```cpp
#include 
#include 
#include 

using namespace QtAV;

class VisualizationAVCell : public QLabel
{
    Q_OBJECT
public:
    explicit VisualizationAVCell(QWidget *parent = nullptr);
    ~VisualizationAVCell();

signals:

public slots:
    void slot_play();

    void slot_pause();

    void slot_stop();

private:
    QtAV::VideoOutput *m_vo;
    QtAV::AVPlayer *m_player;
};

.cpp

#include 
#include 

VisualizationAVCell::VisualizationAVCell(QWidget *parent) : QLabel(parent)
{
    QtAV::Widgets::registerRenderers();

    m_player = new QtAV::AVPlayer(this);
    m_vo = new QtAV::VideoOutput(this);

    if(nullptr == m_vo->widget())
        return;

    QGridLayout *grid = new QGridLayout;
    grid->addWidget(m_vo->widget());
    this->setLayout(grid);
    m_player->setRenderer(m_vo);
}

VisualizationAVCell::~VisualizationAVCell()
{

}

void VisualizationAVCell::slot_play()
{
    m_player->play("H:/QtCode/CSOI/CSOI/testfile/av.mp4");
}

void VisualizationAVCell::slot_pause()
{
    m_player->pause();
}

void VisualizationAVCell::slot_stop()
{
    m_player->stop();
}