QVideoWidget没有视频

Question

我正在使用显示视频在Qt 5.2上做项目。我有一个显示问题，没有电影，但声音仍然运作良好。请帮我解决它。在此先感谢

#include "mainwindow.h" 
#include "ui_mainwindow.h" 
#include <QMediaPlayer> 
#include <QVideoWidget> 
#include <QUrl> 
#include <QMediaPlaylist> 
#include <QWidget> 
#include <QMediaObject> 
#include <QtMultimedia> 

MainWindow::MainWindow(QWidget *parent) : 
    QMainWindow(parent), 
    ui(new Ui::MainWindow) 
{ 
    ui->setupUi(this); 
    QWidget* widget = new QWidget(); 

    player = new QMediaPlayer; 
    QMediaPlaylist* m_playlist = new QMediaPlaylist(player); 
    player->setMedia(QUrl::fromLocalFile("/storage/emulated/0/Bluetooth/video1.mp4")); 

    m_widgetVideo = new QVideoWidget(widget); 
    player->setVideoOutput(m_widgetVideo); 

    setCentralWidget(widget); 
    widget->show(); 
    m_playlist->setCurrentIndex(0); 
    player->play(); 
} 

MainWindow::~MainWindow() 
{ 
    delete ui; 
} 

Answer 1

的Linux：命令和apt-get安装gst123（安装GStreamer的依赖）
窗口：安装LAV过滤器（安装的DirectShow媒体解码器）