少儿编程哪个品牌好_广东网站建站系统哪家好_网络营销的方式和方法_怎么进行网站关键词优化

这个问题一直想解决，昨天认真研究了一下。

• 要点

视频用的Widget不能重复使用，每次出错后，都要新建。

回调函数的处理。

• 代码1

关键在于libvlc_event_attach

void VideoWidget::play()
{libvlc_media_t* media;if (strstr(video_path, "rtsp")){media = libvlc_media_new_location(m_instence, video_path);libvlc_media_add_option(media, ":network-caching=50");}else{media = libvlc_media_new_path(m_instence, video_path);}m_vlcplayer = libvlc_media_player_new_from_media(media);libvlc_media_release(media);//关键libvlc_event_manager_t *event_manager = libvlc_media_player_event_manager(m_vlcplayer);libvlc_event_attach(event_manager, libvlc_MediaPlayerStopped,          (libvlc_callback_t)m_callback, this);//设置窗口句柄libvlc_media_player_set_hwnd(m_vlcplayer,(void*)this->winId());//播放libvlc_media_player_play(m_vlcplayer);
}

• 代码2

上面的m_callback，是外部传递进去的，代码如下：

static void on_vlc_event(const libvlc_event_t *ev, void *param)
{switch (ev->type){case libvlc_MediaPlayerStopped:qDebug() << "VLC媒体播放器时间 libvlc_MediaPlayerStopped!!!";//g_pVideoManagerWidget->restartVideo((VideoWidget*)param);QMetaObject::invokeMethod(g_pVideoManagerWidget, "restartVideo", Qt::QueuedConnection, (VideoWidget*)param);break;default:break;}
}//public slots:
void VideoManagerWidget::restartVideo(VideoWidget* video)
{qDebug() << "restartVideo" <<video->getVideoPath();char path[128] = {0};strcpy(path, video->getVideoPath());RemoveVideo(video);AddVideo(path);this->resizeEvent(nullptr);this->update();
}