libvlc_new 在 vlc 2.1.3 中总是返回 null

libvlc_new 始终返回 null。我已将 libvlc.dll 和 libvlccore.dll 复制到解决方案目录的调试文件夹中。

我们还尝试调用 libvlc_new(0,null) 并将环境变量“VLC_PLUGIN_PATH”设置为插件目录，结果相同。

任何指针出了什么问题/或者在 .net 环境中以编程方式访问 libVlc API 的最佳方法是什么。

请查找下面用 C#、VS2010 开发的代码片段。

IntPtr instance, player ;
string[] args = new string[] {
"-I", "dummy", "--ignore-config",
@"--plugin-path=D:\plugins",
"--vout-filter=deinterlace", "--deinterlace-mode=blend"
};
instance = LibVlc.libvlc_new(args.length, args);
IntPtr media = LibVlc.libvlc_media_new_location(instance, @"rtsp://username assword@IP_address/path");
player = LibVlc.libvlc_media_player_new_from_media(media);
LibVlc.libvlc_media_player_set_hwnd(player, panel1.Handle);
LibVlc.libvlc_media_player_play(player);

we have done P/Invoke for corresponding library calls as:

[DllImport("D:\\myvlc\\myvlc\\bin\\Debug\\libvlc", CallingConvention = CallingConvention.Cdecl)]
public static extern IntPtr libvlc_new(int argc, [MarshalAs(UnmanagedType.LPArray,
ArraySubType = UnmanagedType.LPStr)] string[] argv);

[DllImport("D:\\myvlc\\myvlc\\bin\\Debug\\libvlc", CallingConvention = CallingConvention.Cdecl)]
public static extern IntPtr libvlc_media_new_location(IntPtr p_instance,
[MarshalAs(UnmanagedType.LPStr)] string psz_mrl);

[DllImport("D:\\myvlc\\myvlc\\bin\\Debug\\libvlc", CallingConvention = CallingConvention.Cdecl)]
public static extern IntPtr libvlc_media_player_new_from_media(IntPtr media);

[DllImport("D:\\myvlc\\myvlc\\bin\\Debug\\libvlc", CallingConvention = CallingConvention.Cdecl)]
public static extern void libvlc_media_player_set_hwnd(IntPtr player, IntPtr drawable);

[DllImport("D:\\myvlc\\myvlc\\bin\\Debug\\libvlc", CallingConvention = CallingConvention.Cdecl)]
public static extern void libvlc_media_player_play(IntPtr player);

参数 --plugin-path" 被忽略。

通过复制整个插件目录，可以在 2.1.3 中使用。