Question

libvlc_new始终返回null。我已将libvlc.dll和libvlccore.dll复制到我的解决方案目录的debug文件夹中。

我们也尝试调用libvlc_new（0，null）并将环境变量“VLC_PLUGIN_PATH”设置为plugins目录，结果相同。

任何指针出现错误/或者在.net环境中以程序方式访问libVlc API的最佳方式。

请在C＃，VS2010中找到下面的代码片段。

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);

Answer 1

param --plugin-path“被忽略了。

通过复制整个插件目录与2.1.3一起使用。

Answer 2

找到解决方案，您只需将plugins文件夹复制到visual studio解决方案文件夹的debug目录即可。希望这会为其他人尝试相同的事情节省一些时间。我已经尝试了将近一天。

libvlc_new始终在vlc 2.1.3中返回null

2 个答案: