C#4.0 Issues playing .mp3 files over 192kbps using winmm.dll

Question

MCIERR_INTERNALI am trying to make a simple Media player inside an app, but I've noticed that my code WILL NOT play music unless the file is a low bitrate around 192kbps or less. The issue is that most of my music is around 260-320kbps.

Here's my code, if there's something I can do to up the 'available' bitrate options let me know, otherwise I'll need a new DLL suggestion please!

class MusicPlayer
{
    [DllImport("winmm.dll")]
    private static extern long mciSendString(string lpstrCommand, StringBuilder lpstrReturnString, int uReturnLength, int hwndCallback);

    private static void checkMCIResult(long code)
    {
        int err = (int)(code & 0xffffffff);
        if (err != 0)
        {
            throw new Exception(string.Format("MCI error {0}", err));
        }
    }

    public void open(string file)
    {
        string command = "open \"" + file + "\" type MPEGVideo alias MyMp3";
        checkMCIResult(mciSendString(command, null, 0, 0));
    }

    public void play()
    {
        string command = "play MyMp3";
        mciSendString(command, null, 0, 0);
    }
    public void pause()
    {
        string command = "stop MyMp3";
        mciSendString(command, null, 0, 0);
    }
}

**EDIT: -Winform application

-using Windows 7 sp1

-Using Visulal Studio 2013 community edition

-From error catching I now see the error number is 289, -256 = 22: MCIERR_INTERNAL, not sure what that's all about

Answer 1

This is not an inherent limitation in Windows, problems like these are environmental. A basic check-list:

• Try this with a known-good MP3 file. That test file is encoded at 320 kbps. This helps eliminate a specific problem with your files, like a wonky DRM scheme that only permits playback on an approved player.
• Make sure you run this code on an STA thread, the kind provided by a Winforms or WPF app. Not a console mode app, it requires the kind of code you find in this post.
• Beware of having non-standard ACM drivers installed. There is a lot of junk out there, always treat "codec packs" with strong distrust. Review the HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Drivers32 registry key, that's where ACM drivers are registered.
• And last but certainly not least, you are blind as a bat as long as you are ignoring the return value of mciSendString(). When it fails, it produces an error code that tells you the reason.

A simple implementation of an error checker method:

    private static void checkMCIResult(long code) {
        int err = (int)(code & 0xffffffff);
        if (err != 0) {
            throw new Exception(string.Format("MCI error {0}", err));
        }
    }

Usage:

    public static void open(string file) {
        string command = "open \"" + file + "\" type MPEGVideo alias MyMp3";
        checkMCIResult(mciSendString(command, null, 0, 0));
    }

There are a lot of possible MCI errors, you'll find them listed in MMSystem.h file in the Windows SDK "include" directory on your machine. Like C:\Program Files (x86)\Microsoft SDKs\Windows\v7.1A\Include\MMSystem.h. Start at MCIERR_INVALID_DEVICE_ID, subtract 256 from the error code. Always mention your Windows and VS version btw.