应某用户的需求，编写了这款根据音视频时长分类小工具。

实际效果如下：

显示的是时分秒：

核心代码：

MediaInfo MI;  

	if (MI.Open(strPathInput.c_str()) == 0)
	{
		return -1;
	}

	_tstring stDuration = MI.Get(stream_t::Stream_Audio,0,_T("Duration/String3")).c_str();

	if (stDuration.length() == 0)
	{
		return -1;
	}

	//去掉小数点后面的
	stDuration = CStdStr::GetNameOfFile(stDuration, false);

	//合法
	stDuration = CStdStr::ToValidFileName(stDuration, _T('-'));

	MI.Close(); 

	_tstring strDir = CStdStr::GetDirOfFile(strPathInput);
	_tstring strRootDir = CStdStr::AddSlashIfNeeded(strDir);

	if (_access(CStdStr::ws2s(strRootDir).c_str(), 0) != 0 && !CreateDirectory(CString(strRootDir.c_str()), NULL))
	{
		return -1;
	}

	_tstring stYearMonth = stDuration;
	_tstring stSaveDir = strRootDir + stYearMonth;
	const _tstring& sStr = strPathInput;

	if (_access(CStdStr::ws2s(stSaveDir).c_str(), 0) != 0 && !CreateDirectory(CString(stSaveDir.c_str()), NULL))
	{
		return -1;
	}

	const _tstring stSaveDirBak(stSaveDir);

	//如果当前目录已经存在超过nMaxCount个文件，则需要新建目录
	int nDirIndex = 0;
	std::vector<_tstring> vFilesExisted;
	while (g_nMaxCount > 0 && getFiles(stSaveDir, vFilesExisted, "*") >= g_nMaxCount)
	{
		++nDirIndex;
		_tstring stSaveDirNew = stSaveDirBak + _T("-") + CStdTpl::ConvertToString(nDirIndex);
		if (_access(CStdStr::ws2s(stSaveDirNew).c_str(), 0) != 0 && !CreateDirectory(CString(stSaveDirNew.c_str()), NULL))
		{
			return -1;
		}
		vFilesExisted.clear();
		stSaveDir = stSaveDirNew;
	}

	_tstring strSavePath = CStdStr::AddSlashIfNeeded(stSaveDir) + CStdStr::GetNameOfFile(sStr);
	g_Mutex.Lock();
	int nNum = 0;
	if (CStdFile::IfAccessFile(strSavePath))
	{
		do
		{
			++nNum;
			strSavePath = CStdStr::AddSlashIfNeeded(stSaveDir) + CStdStr::GetNameOfFile(sStr, false) + 
				CStdTpl::ConvertToString(nNum) + CStdStr::GetSuffixOfFile(sStr);

		} while (CStdFile::IfAccessFile(strSavePath));
	}

	//查看同目录下，是否存在mp3, mp4, srt文件
	MoveDefFile(sStr, strSavePath, _T(".mp3"));
	MoveDefFile(sStr, strSavePath, _T(".mp4"));
	MoveDefFile(sStr, strSavePath, _T(".srt"));

	g_Mutex.Unlock();

	return 0;
}

即可实现，移动到指定目录，上述代码还实现了同名srt等移动到相同目录，这也是因为用户的需求。

欢迎交流与讨论。