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我一直在尝试使用FFmpeg.Autogen. 使用先前提出的问题，我制作了一个修改后的示例，展示了我当前如何尝试应用transpose过滤器。

private void SetupTransposeFilter()
{
    AVFilterGraph* filter_graph = ffmpeg.avfilter_graph_alloc();

    AVFilter* transposeFilter = ffmpeg.avfilter_get_by_name("transpose");
    AVFilter* buffersink = ffmpeg.avfilter_get_by_name("buffersink");

    AVFilterContext* buffersrc_ctx;
    AVFilterContext* buffersrc_transpose;
    ffmpeg.avfilter_graph_create_filter(&buffersrc_ctx, buffersink, "buffersink", null, null, filter_graph).ThrowExceptionIfError();
    ffmpeg.avfilter_graph_create_filter(&buffersrc_transpose, transposeFilter, "transpose", "cclock", null, filter_graph).ThrowExceptionIfError();

    AVFilterInOut* outputs = ffmpeg.avfilter_inout_alloc();
    AVFilterInOut* inputs = ffmpeg.avfilter_inout_alloc();
    outputs->name = ffmpeg.av_strdup("buffersink");
    outputs->filter_ctx = buffersrc_ctx;
    outputs->pad_idx = 0;
    outputs->next = null;
    inputs->name = ffmpeg.av_strdup("transpose");
    inputs->filter_ctx = buffersrc_transpose;
    inputs->pad_idx = 0;
    inputs->next = null;

    ffmpeg.avfilter_graph_parse_ptr(filter_graph, "transpose=cclock", &inputs, &outputs, null).ThrowExceptionIfError();
    ffmpeg.avfilter_graph_config(filter_graph, null).ThrowExceptionIfError();

    ffmpeg.avfilter_inout_free(&inputs);
    ffmpeg.avfilter_inout_free(&outputs);
}

它到达第 25 行，其中avfilter_graph_config给了我一个错误代码 -22，在FFmpeg显示这个 a "Invalid argument"。我尝试更改中的参数，avfilter_graph_parse_ptr但它给出了相同的错误消息。

任何有关如何克服这一挑战的提示或技巧都将受到极大的欢迎。

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