sink writer在成功1-3次后总是停止或出错？

Question

我正在使用接收器编写器来编写从桌面复制获得的示例。 但成功1-3次后就会停止或出错，代码如下：

while(true){
hr = dxgiOutputDuplication->AcquireNextFrame(0, &frame_info, &resource);
if (SUCCEEDED(hr)) {
    ID3D11Texture2D* texture = NULL;
    hr = resource->QueryInterface(__uuidof(ID3D11Texture2D), (void**)&texture);
    if (SUCCEEDED(hr)) {
        IDXGISurface* dxgiSurface = NULL;
        hr = texture->QueryInterface(__uuidof(IDXGISurface), (void**)&dxgiSurface);
        if (SUCCEEDED(hr)) {
            IMFSample* sample = NULL;
            hr = MFCreateSample(&sample);
            if (SUCCEEDED(hr)) {
                IMFMediaBuffer* buffer = NULL;
                hr = MFCreateDXGISurfaceBuffer(__uuidof(ID3D11Texture2D), dxgiSurface, 0, FALSE, &buffer);
                if (SUCCEEDED(hr)) {
                    hr = sample->AddBuffer(buffer);
                    hr = sample->SetSampleDuration(duration);
                    hr = presentation->GetTime(&sampleTime);
                    hr = sample->SetSampleTime(sampleTime);
                    //sampleTime += duration * 10;

                    DWORD length = 0;
                    IMF2DBuffer* imf_buffer = NULL;
                    hr = buffer->QueryInterface(__uuidof(IMF2DBuffer), (void**)&imf_buffer);
                    if (SUCCEEDED(hr)) {
                        hr = imf_buffer->GetContiguousLength(&length);
                        hr = buffer->SetCurrentLength(length);

                        hr = writer->WriteSample(0, sample);

                        if (FAILED(hr)) {
                            OutputDebugString(L"FAILED WRITE SAMPLE\n");
                        }

                        o++;
                        if (o > 1920) {
                            writer->Finalize();

                            OutputDebugString(L"OOOOOOOOOO");
                            break;
                        }
                        imf_buffer->Release();
                        imf_buffer = NULL;
                    }

                    buffer->Release();
                    buffer = NULL;
                }
                sample->Release();
                sample = NULL;
            }
            dxgiSurface->Release();
            dxgiSurface = NULL;
        }
        texture->Release();
        texture = NULL;
    }
    resource->Release();
    resource = NULL;
}
dxgiOutputDuplication->ReleaseFrame();
}

原谅 if else 代码，我只是用它来测试。我应该使用 THROW_IF_ERROR 如果您想要这里的示例代码，它是：https://github.com/ljzj2/testdemo1

Answer 1

API 不会以这种方式工作。您无法直接添加 Desktop Duplication API 作为 Sink Writer API 的输入纹理：该纹理是短暂的。您需要先制作一个副本，然后将副本提供给 Sink Writer 管道。