https://github.com/Ruslan-B/FFmpeg.AutoGen/issues/109

Question

我正在发布此错误报告，但我不知道可以从stacktrace看到FFmpeg.Autogen。无论如何，我在Github上发布了错误报告

https://github.com/Ruslan-B/FFmpeg.AutoGen/issues/109

我正在尝试在使用FFmpeg.Autogen与ffmpeg库进行接口的Linux中运行代码。我正在获取kernel32 dll，找不到原因。他说不要将问题发布到github进行故障排除。可能相关的问题：https://github.com/Ruslan-B/FFmpeg.AutoGen/issues/89

我尝试过的第一件事是在示例代码中加入了二进制帮助程序类，对此我做了一些调整。将确切路径添加到linux文件。我做的第二件事是添加FFmpeg.AutoGen.dll.config（如果配置正确），并且它尝试引用Windows DLL，它应该指向linux。堆栈跟踪：

System.DllNotFoundException: kernel32
  at at (wrapper managed-to-native) FFmpeg.AutoGen.Native.WindowsNativeMethods.GetProcAddress(intptr,string)
  at FFmpeg.AutoGen.Native.FunctionLoader.GetFunctionPointer (System.IntPtr nativeLibraryHandle, System.String functionName) [0x00000] in D:\FFmpeg.AutoGen\FFmpeg.AutoGen\Native\FunctionLoader.cs:55
  at FFmpeg.AutoGen.Native.FunctionLoader.GetFunctionDelegate[T] (System.IntPtr nativeLibraryHandle, System.String functionName, System.Boolean throwOnError) [0x00000] in D:\FFmpeg.AutoGen\FFmpeg.AutoGen\Native\FunctionLoader.cs:28
  at FFmpeg.AutoGen.ffmpeg.GetFunctionDelegate[T] (System.IntPtr libraryHandle, System.String functionName) [0x00000] in D:\FFmpeg.AutoGen\FFmpeg.AutoGen\FFmpeg.cs:50
  at FFmpeg.AutoGen.ffmpeg+<>c.<.cctor>b__4_318 () [0x00000] in D:\FFmpeg.AutoGen\FFmpeg.AutoGen\FFmpeg.functions.export.g.cs:7163
  at FFmpeg.AutoGen.ffmpeg.avformat_alloc_context () [0x00000] in D:\FFmpeg.AutoGen\FFmpeg.AutoGen\FFmpeg.functions.export.g.cs:7176
  at FF8.FfccVaribleGroup..ctor () [0x0009c] in /home/robert/OpenVIII/FF8/FfccVaribleGroup.cs:53
  at FF8.Ffcc..ctor (System.String filename, FFmpeg.AutoGen.AVMediaType mediatype, FF8.Ffcc+FfccMode mode) [0x00008] in /home/robert/OpenVIII/FF8/Ffcc.cs:31
  at FF8.Module_movie_test.InitMovie () [0x00001] in /home/robert/OpenVIII/FF8/module_movie_test.cs:160
  at FF8.Module_movie_test.Update () [0x000c5] in /home/robert/OpenVIII/FF8/module_movie_test.cs:88
  at FF8.ModuleHandler.Update (Microsoft.Xna.Framework.GameTime gameTime) [0x000ac] in /home/robert/OpenVIII/FF8/ModuleHandler.cs:43
  at FF8.Game1.Update (Microsoft.Xna.Framework.GameTime gameTime) [0x00030] in /home/robert/OpenVIII/FF8/Game1.cs:69
  at Microsoft.Xna.Framework.Game.DoUpdate (Microsoft.Xna.Framework.GameTime gameTime) [0x00019] in <4fc8466c27384bb19c7b81b2a6a71083>:0
  at Microsoft.Xna.Framework.Game.Tick () [0x00103] in <4fc8466c27384bb19c7b81b2a6a71083>:0
  at Microsoft.Xna.Framework.SdlGamePlatform.RunLoop () [0x00021] in <4fc8466c27384bb19c7b81b2a6a71083>:0
  at Microsoft.Xna.Framework.Game.Run (Microsoft.Xna.Framework.GameRunBehavior runBehavior) [0x0008b] in <4fc8466c27384bb19c7b81b2a6a71083>:0
  at Microsoft.Xna.Framework.Game.Run () [0x0000c] in <4fc8466c27384bb19c7b81b2a6a71083>:0
  at FF8.Program.Main () [0x00007] in /home/robert/OpenVIII/FF8/Program.cs:17

触发此操作的代码：

Format = ffmpeg.avformat_alloc_context();

Binaryhelper应该为文件正确设置路径

internal static void RegisterFFmpegBinaries()
        {
            var libraryPath = "";
            switch (Environment.OSVersion.Platform)
            {
                case PlatformID.Win32NT:
                case PlatformID.Win32S:
                case PlatformID.Win32Windows:
                    var current = Environment.CurrentDirectory;
                    var probe = Path.Combine(Environment.Is64BitProcess ? "x64" : "x86");
                    while (current != null)
                    {
                        var ffmpegDirectory = Path.Combine(current, probe);
                        if (Directory.Exists(ffmpegDirectory))
                        {
                            Console.WriteLine($"FFmpeg binaries found in: {ffmpegDirectory}");
                            RegisterLibrariesSearchPath(ffmpegDirectory);
                            return;
                        }
                        current = Directory.GetParent(current)?.FullName;
                    }
                    break;
                case PlatformID.Unix:
                    libraryPath = "/usr/lib/x86_64-linux-gnu";
                    RegisterLibrariesSearchPath(libraryPath);
                    break;
                case PlatformID.MacOSX:
                    libraryPath = Environment.GetEnvironmentVariable(LD_LIBRARY_PATH);
                    RegisterLibrariesSearchPath(libraryPath);
                    break;
            }
        }

FFmpeg.Autogen.dll.config

<configuration>
  <dllmap os="linux" dll="avutil-56.dll" target="/usr/lib/x86_64-linux-gnu/libavutil.so.56"/>
  <dllmap os="linux" dll="avcodec-58.dll" target="/usr/lib/x86_64-linux-gnu/libavcodec.so.58"/>
  <dllmap os="linux" dll="avformat-58.dll" target="/usr/lib/x86_64-linux-gnu/libavformat.so.58"/>
  <dllmap os="linux" dll="avdevice-58.dll" target="/usr/lib/x86_64-linux-gnu/libavdevice.so.58"/>
  <dllmap os="linux" dll="avfilter-7.dll" target="/usr/lib/x86_64-linux-gnu/libavfilter.so.7"/>
  <dllmap os="linux" dll="avresample-4.dll" target="/usr/lib/x86_64-linux-gnu/libavresample.so.4"/>
  <dllmap os="linux" dll="swscale-5.dll" target="/usr/lib/x86_64-linux-gnu/libswscale.so.5"/>
  <dllmap os="linux" dll="swresample-3.dll" target="/usr/lib/x86_64-linux-gnu/libswresample.so.3"/>
  <dllmap os="linux" dll="postproc-55.dll" target="/usr/lib/x86_64-linux-gnu/libpostproc.so.55"/>
</configuration>

Answer 1

https://github.com/Ruslan-B/FFmpeg.AutoGen/issues/109#issuecomment-477756443

Ruslan-B说他要修复它。

应用修复后，大多数情况下都可以正常工作，我想我只是看不到视频，因为我使用的色彩空间不适用于Linux。音频工作正常。

但是这个问题已经解决了。

Elgonzo在评论中帮助指出了正确的问题，不是库无法加载。正是FFmpeg.Autogen使用了错误的仅Windows功能。

在Mono / Linux中使用FFmpeg.Autogen 4.1.0.2时找不到Kernel32

https://github.com/Ruslan-B/FFmpeg.AutoGen/issues/109

1 个答案: