Question

我是PowerShell的新手，最近一直在玩它。

我的问题是，如何使用PowerShell将特定应用程序静音？例如，如果我正在观看Chrome中的YouTube视频，我只能通过进入音量调音台并将Chrome从应用列表中静音来静音。有没有办法在PowerShell中执行此操作？

我发现了一篇关于如何将所有内容静音但不是特定应用的文章。

Answer 1

我在一个小的PowerShell脚本中包含了发布的here示例应用程序，因此可以使用静态方法从Powershell中轻松使用它。只要您指定正确的应用程序名称，这应该是您要查找的内容。

例如：

[SetAppVolume.AppMuter]::Mute("Mozilla Firefox");

示例代码：

$def = @"
using System;
using System.Runtime.InteropServices;
using System.Collections.Generic;

namespace SetAppVolume
{
    public class AppMuter
    {
        public static void Mute(string app)
        {
            foreach (string name in EnumerateApplications())
            {
                Console.WriteLine("name:" + name);
                if (name == app)
                {
                    // display mute state & volume level (% of master)
                    Console.WriteLine("Mute:" + GetApplicationMute(app));
                    Console.WriteLine("Volume:" + GetApplicationVolume(app));

                    // mute the application
                    SetApplicationMute(app, true);

                    // set the volume to half of master volume (50%)
                    SetApplicationVolume(app, 50);
                }
            }
        }

        public static float? GetApplicationVolume(string name)
        {
            ISimpleAudioVolume volume = GetVolumeObject(name);
            if (volume == null)
                return null;

            float level;
            volume.GetMasterVolume(out level);
            return level * 100;
        }

        public static bool? GetApplicationMute(string name)
        {
            ISimpleAudioVolume volume = GetVolumeObject(name);
            if (volume == null)
                return null;

            bool mute;
            volume.GetMute(out mute);
            return mute;
        }

        public static void SetApplicationVolume(string name, float level)
        {
            ISimpleAudioVolume volume = GetVolumeObject(name);
            if (volume == null)
                return;

            Guid guid = Guid.Empty;
            volume.SetMasterVolume(level / 100, ref guid);
        }

        public static void SetApplicationMute(string name, bool mute)
        {
            ISimpleAudioVolume volume = GetVolumeObject(name);
            if (volume == null)
                return;

            Guid guid = Guid.Empty;
            volume.SetMute(mute, ref guid);
        }

        public static IEnumerable<string> EnumerateApplications()
        {
            // get the speakers (1st render + multimedia) device
            IMMDeviceEnumerator deviceEnumerator = (IMMDeviceEnumerator)(new MMDeviceEnumerator());
            IMMDevice speakers;
            deviceEnumerator.GetDefaultAudioEndpoint(EDataFlow.eRender, ERole.eMultimedia, out speakers);

            // activate the session manager. we need the enumerator
            Guid IID_IAudioSessionManager2 = typeof(IAudioSessionManager2).GUID;
            object o;
            speakers.Activate(ref IID_IAudioSessionManager2, 0, IntPtr.Zero, out o);
            IAudioSessionManager2 mgr = (IAudioSessionManager2)o;

            // enumerate sessions for on this device
            IAudioSessionEnumerator sessionEnumerator;
            mgr.GetSessionEnumerator(out sessionEnumerator);
            int count;
            sessionEnumerator.GetCount(out count);

            for (int i = 0; i < count; i++)
            {
                IAudioSessionControl ctl;
                sessionEnumerator.GetSession(i, out ctl);
                string dn;
                ctl.GetDisplayName(out dn);
                yield return dn;
                Marshal.ReleaseComObject(ctl);
            }
            Marshal.ReleaseComObject(sessionEnumerator);
            Marshal.ReleaseComObject(mgr);
            Marshal.ReleaseComObject(speakers);
            Marshal.ReleaseComObject(deviceEnumerator);
        }

        private static ISimpleAudioVolume GetVolumeObject(string name)
        {
            // get the speakers (1st render + multimedia) device
            IMMDeviceEnumerator deviceEnumerator = (IMMDeviceEnumerator)(new MMDeviceEnumerator());
            IMMDevice speakers;
            deviceEnumerator.GetDefaultAudioEndpoint(EDataFlow.eRender, ERole.eMultimedia, out speakers);

            // activate the session manager. we need the enumerator
            Guid IID_IAudioSessionManager2 = typeof(IAudioSessionManager2).GUID;
            object o;
            speakers.Activate(ref IID_IAudioSessionManager2, 0, IntPtr.Zero, out o);
            IAudioSessionManager2 mgr = (IAudioSessionManager2)o;

            // enumerate sessions for on this device
            IAudioSessionEnumerator sessionEnumerator;
            mgr.GetSessionEnumerator(out sessionEnumerator);
            int count;
            sessionEnumerator.GetCount(out count);

            // search for an audio session with the required name
            // NOTE: we could also use the process id instead of the app name (with IAudioSessionControl2)
            ISimpleAudioVolume volumeControl = null;
            for (int i = 0; i < count; i++)
            {
                IAudioSessionControl ctl;
                sessionEnumerator.GetSession(i, out ctl);
                string dn;
                ctl.GetDisplayName(out dn);
                if (string.Compare(name, dn, StringComparison.OrdinalIgnoreCase) == 0)
                {
                    volumeControl = ctl as ISimpleAudioVolume;
                    break;
                }
                Marshal.ReleaseComObject(ctl);
            }
            Marshal.ReleaseComObject(sessionEnumerator);
            Marshal.ReleaseComObject(mgr);
            Marshal.ReleaseComObject(speakers);
            Marshal.ReleaseComObject(deviceEnumerator);
            return volumeControl;
        }
    }

    [ComImport]
    [Guid("BCDE0395-E52F-467C-8E3D-C4579291692E")]
    internal class MMDeviceEnumerator
    {
    }

    internal enum EDataFlow
    {
        eRender,
        eCapture,
        eAll,
        EDataFlow_enum_count
    }

    internal enum ERole
    {
        eConsole,
        eMultimedia,
        eCommunications,
        ERole_enum_count
    }

    [Guid("A95664D2-9614-4F35-A746-DE8DB63617E6"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    internal interface IMMDeviceEnumerator
    {
        int NotImpl1();

        [PreserveSig]
        int GetDefaultAudioEndpoint(EDataFlow dataFlow, ERole role, out IMMDevice ppDevice);

        // the rest is not implemented
    }

    [Guid("D666063F-1587-4E43-81F1-B948E807363F"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    internal interface IMMDevice
    {
        [PreserveSig]
        int Activate(ref Guid iid, int dwClsCtx, IntPtr pActivationParams, [MarshalAs(UnmanagedType.IUnknown)] out object ppInterface);

        // the rest is not implemented
    }

    [Guid("77AA99A0-1BD6-484F-8BC7-2C654C9A9B6F"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    internal interface IAudioSessionManager2
    {
        int NotImpl1();
        int NotImpl2();

        [PreserveSig]
        int GetSessionEnumerator(out IAudioSessionEnumerator SessionEnum);

        // the rest is not implemented
    }

    [Guid("E2F5BB11-0570-40CA-ACDD-3AA01277DEE8"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    internal interface IAudioSessionEnumerator
    {
        [PreserveSig]
        int GetCount(out int SessionCount);

        [PreserveSig]
        int GetSession(int SessionCount, out IAudioSessionControl Session);
    }

    [Guid("F4B1A599-7266-4319-A8CA-E70ACB11E8CD"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    internal interface IAudioSessionControl
    {
        int NotImpl1();

        [PreserveSig]
        int GetDisplayName([MarshalAs(UnmanagedType.LPWStr)] out string pRetVal);

        // the rest is not implemented
    }

    [Guid("87CE5498-68D6-44E5-9215-6DA47EF883D8"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    internal interface ISimpleAudioVolume
    {
        [PreserveSig]
        int SetMasterVolume(float fLevel, ref Guid EventContext);

        [PreserveSig]
        int GetMasterVolume(out float pfLevel);

        [PreserveSig]
        int SetMute(bool bMute, ref Guid EventContext);

        [PreserveSig]
        int GetMute(out bool pbMute);
    }
}
"@;


Add-Type -TypeDefinition $def -Language CSharpVersion3
# Example usage
[SetAppVolume.AppMuter]::Mute("Mozilla Firefox");

Answer 2

我最近喜欢阅读Feature Flags as a Service: The Only Way You Want Feature Flags，它清楚地表达了我的观点（我与rollout.io的团队没有任何联系）

在软件世界中，最伟大的辩论之一是构建与购买。任何具有软件开发背景的人都会告诉您，重新发明轮子的诱惑力很强。当然，任何语言的标准库都具有优化的列表排序功能。但是那有什么乐趣呢？编写自己的游戏会很有趣并且很有趣，而且您不必依靠其他人的方法...当您以谋生为目的构建软件时，您倾向于通过构建软件来应对障碍。你做自己擅长的事。这适用于个人，也适用于整个团体。但重要的是要克服这种趋势并做出商业决策，而不是情绪化的决策。

因此，我建议使用NirCmd's muteappvolume功能并围绕它构建一个小的Powershell包装器，以适合您的目的。就我而言，我长时间rain.mp3在不使用UI的情况下使用VLC来播放我的焦点时间，但我需要切换静音/取消静音才能进行缩放，或者在平凡时只听Annie Mac东西。我只需在终端中按r即可切换静音/取消静音，而这段代码位于PowerShell的$profile中。再说一次，这不仅是静音，还可以切换静音/取消静音，所以我取消静音的操作完全相同。当nircmd这样的酷工具很容易获得时，无需重新发明轮子。

function toggleRain {
    $commandLineProperty = '"C:\Program Files\VideoLAN\VLC\vlc.exe" --intf dummy c:\Users\Admin\Music\rain.mp3'
    $rainPid = (Get-Process vlc | Where-Object {$_.CommandLine -eq $commandLineProperty}).Id
    nircmd muteappvolume /$rainPid 2
}

Set-Alias r toggleRain

如何使用PowerShell静音应用程序

2 个答案: