是否有可能改变通过 wmplib 播放的 mp3 文件的音量?改变程序本身的音量也可以。
有什么解决方案可以做到这一点吗?
这是一种简单的方法。
例子:
WMPlib.WindowsMediaPlayer wmp = new WMPlib.WindowsMediaPlayer(); //Creates an instance of the WMP
wmp.url="URI to media source"; //Sets media source
wmp.settings.volume= 50; //Volume can be 0-100 (inclusive)
希望对您有所帮助!
这个想法是发送WM_APPCOMMAND 消息(另见这个答案)。
对于 WPF 使用WindowInteropHelper来获取Handle
:Window
class MainWindow : Window
{
...
private const int APPCOMMAND_VOLUME_MUTE = 0x80000;
private const int WM_APPCOMMAND = 0x319;
private const int APPCOMMAND_VOLUME_UP = 10 * 65536;
private const int APPCOMMAND_VOLUME_DOWN = 9 * 65536;
[DllImport("user32.dll")]
public static extern IntPtr SendMessageW(IntPtr hWnd, int Msg, IntPtr wParam, IntPtr lParam);
private void VolumeUp()
{
// APPCOMMAND_VOLUME_UP or APPCOMMAND_VOLUME_DOWN
var windowInteropHelper = new WindowInteropHelper(this);
SendMessageW(windowInteropHelper.Handle, (IntPtr)WM_APPCOMMAND, windowInteropHelper.Handle, (IntPtr)APPCOMMAND_VOLUME_UP);
}
}
对于 Windows 窗体,使用Control.Handle 属性:
class MainForm : Form
{
...
private void VolumeUp()
{
SendMessageW(Handle, (IntPtr)WM_APPCOMMAND, Handle, (IntPtr)APPCOMMAND_VOLUME_UP);
}
}
这对我有用!
WMPLib.WindowsMediaPlayer wmsound= new WMPLib.WindowsMediaPlayer();
wmsound.URL = @"C:\Users\USER\sound.mp3";
//Volume 100%
finish_sound.settings.volume = 100;