Qt播放音视频文件报错DirectShowPlayerService::doRender: Unresolved error code 0x80040266或DirectShowPlayerService::doSetUrlSource: Unresolved error code 0x80004005 ()

使用QMediaPlayer和QVideoWidget
QHBoxLayout *m_layout=
newQHBoxLayout(this);

QMediaPlayer *m_player = new QMediaPlayer(this);
m_player->setMedia(QUrl::fromLocalFile(QString::fromLocal8Bit("d:/QtTest/111.mp4")));

QVideoWidget *m_videoW = new QVideoWidget(this);
m_layout->addWidget(m_videoW);
this->setLayout(m_layout);

m_player->setVideoOutput(m_videoW);
m_videoW->show();

m_player->play();

代码写起来很简单，编译也能通过，但是运行就会出错
DirectShowPlayerService::doRender: Unresolved error code 0x80040266

如果文件路径不对或者文件名是中文的，则会显示如下错误：
DirectShowPlayerService::doSetUrlSource: Unresolved error code 0x80004005 ()

网上查了下，
Qt 中的多媒体播放，底层是使用DirectShowPlayerService，所以安装一个DirectShow解码器，例如LAV Filters，就可以解决运行出错问题
相关帖子
http://bbs.csdn.net/topics/391040873

https://github.com/qyvlik/Flat.qml/issues/4

下载LAV Filters地址
http://forum.doom9.org/showthread.php?t=156191 里的
Binaries for the most recent version are available here:
Version 0.68.1:
Installer (both x86/x64) -- Zips:
32-bit &
64-bit
Download 3D Plugin:
32-bit &
64-bit
选择32bit或者64bit下
下载完安装后，再运行程序，运行无错误，能够正常播放视频。

转自：https://blog.csdn.net/qqwangfan/article/details/52469859