C# 媒体基础H.264高CPU使用率 在媒体Foundation .NET中，我在CPU上写下了流的高CPU使用率。下面是我如何初始化sinkwriter的 private int InitializeSinkWriter(String outputFile, int videoWidth, int videoHeight) { IMFMediaType mediaTypeIn = null; IMFMediaType mediaTypeOut = null; IMFAttributes attributes = null; int hr = 0; if (Succeeded(hr)) hr = (int)MFExtern.MFCreateAttributes(out attributes, 1); if (Succeeded(hr)) hr = (int)attributes.SetUINT32(MFAttributesClsid.MF_READWRITE_ENABLE_HARDWARE_TRANSFORMS, 1); if (Succeeded(hr)) hr = (int)attributes.SetUINT32(MFAttributesClsid.MF_SINK_WRITER_DISABLE_THROTTLING, 1); if (Succeeded(hr)) hr = (int)attributes.SetUINT32(MFAttributesClsid.MF_LOW_LATENCY, 1); // Create the sink writer if (Succeeded(hr)) hr = (int)MFExtern.MFCreateSinkWriterFromURL(outputFile, null, attributes, out sinkWriter); // Create the output type if (Succeeded(hr)) hr = (int)MFExtern.MFCreateMediaType(out mediaTypeOut); if (Succeeded(hr)) hr = (int)mediaTypeOut.SetGUID(MFAttributesClsid.MF_MT_MAJOR_TYPE, MFMediaType.Video); if (Succeeded(hr)) hr = (int)mediaTypeOut.SetGUID(MFAttributesClsid.MF_TRANSCODE_CONTAINERTYPE, MFTranscodeContainerType.MPEG4); if (Succeeded(hr)) hr = (int)mediaTypeOut.SetGUID(MFAttributesClsid.MF_MT_SUBTYPE, MFMediaType.H264); if (Succeeded(hr)) hr = (int)mediaTypeOut.SetUINT32(MFAttributesClsid.MF_MT_AVG_BITRATE, videoBitRate); if (Succeeded(hr)) hr = (int)mediaTypeOut.SetUINT32(MFAttributesClsid.MF_MT_INTERLACE_MODE, (int)MFVideoInterlaceMode.Progressive); if (Succeeded(hr)) hr = (int)MFExtern.MFSetAttributeSize(mediaTypeOut, MFAttributesClsid.MF_MT_FRAME_SIZE, videoWidth, videoHeight); if (Succeeded(hr)) hr = (int)MFExtern.MFSetAttributeRatio(mediaTypeOut, MFAttributesClsid.MF_MT_FRAME_RATE, VIDEO_FPS, 1); if (Succeeded(hr)) hr = (int)MFExtern.MFSetAttributeRatio(mediaTypeOut, MFAttributesClsid.MF_MT_PIXEL_ASPECT_RATIO, 1, 1); if (Succeeded(hr)) hr = (int)sinkWriter.AddStream(mediaTypeOut, out streamIndex); // Create the input type if (Succeeded(hr)) hr = (int)MFExtern.MFCreateMediaType(out mediaTypeIn); if (Succeeded(hr)) hr = (int)mediaTypeIn.SetGUID(MFAttributesClsid.MF_MT_MAJOR_TYPE, MFMediaType.Video); if (Succeeded(hr)) hr = (int)mediaTypeIn.SetGUID(MFAttributesClsid.MF_MT_SUBTYPE, MFMediaType.RGB32); if (Succeeded(hr)) hr = (int)mediaTypeIn.SetUINT32(MFAttributesClsid.MF_MT_INTERLACE_MODE, (int)MFVideoInterlaceMode.Progressive); if (Succeeded(hr)) hr = (int)MFExtern.MFSetAttributeSize(mediaTypeIn, MFAttributesClsid.MF_MT_FRAME_SIZE, videoWidth, videoHeight); if (Succeeded(hr)) hr = (int)MFExtern.MFSetAttributeRatio(mediaTypeIn, MFAttributesClsid.MF_MT_FRAME_RATE, VIDEO_FPS, 1); if (Succeeded(hr)) hr = (int)MFExtern.MFSetAttributeRatio(mediaTypeIn, MFAttributesClsid.MF_MT_PIXEL_ASPECT_RATIO, 1, 1); if (Succeeded(hr)) hr = (int)sinkWriter.SetInputMediaType(streamIndex, mediaTypeIn, null); // Start accepting data if (Succeeded(hr)) hr = (int)sinkWriter.BeginWriting(); COMBase.SafeRelease(mediaTypeOut); COMBase.SafeRelease(mediaTypeIn); return hr; } IMFSample sample = null; IMFMediaBuffer buffer = null; IntPtr data = new IntPtr(); int bufferMaxLength; int bufferCurrentLength; int hr = (int)MFExtern.MFCreateMemoryBuffer(frameSizeBytes, out buffer); if (Succeeded(hr)) hr = (int)buffer.Lock(out data, out bufferMaxLength, out bufferCurrentLength); if (Succeeded(hr)) { hr = (int)MFExtern.MFCopyImage( data, // Destination buffer. videoWidth * BYTES_PER_PIXEL, // Destination stride. (IntPtr)(frame.frame.DataPointer + (videoHeight - 1) * frame.frame.RowPitch), // First row in source image. -frame.frame.RowPitch, // Source stride. videoWidth * BYTES_PER_PIXEL, // Destination stride. videoHeight // Image height in pixels ); } if (Succeeded(hr)) hr = (int)buffer.Unlock(); if (Succeeded(hr)) hr = (int)buffer.SetCurrentLength(frameSizeBytes); if (Succeeded(hr)) hr = (int)MFExtern.MFCreateSample(out sample); if (Succeeded(hr)) hr = (int)sample.AddBuffer(buffer); if (Succeeded(hr)) hr = (int)sample.SetSampleTime(frame.prevRecordingDuration); if (Succeeded(hr)) hr = (int)sample.SetSampleDuration((frame.recordDuration-frame.prevRecordingDuration)); if (Succeeded(hr)) hr = (int)sinkWriter.WriteSample(streamIndex, sample); COMBase.SafeRelease(sample); COMBase.SafeRelease(buffer);

这就是在sinkwriter上添加示例的方式

private int InitializeSinkWriter(String outputFile, int videoWidth, int videoHeight)
    {
        IMFMediaType mediaTypeIn = null;
        IMFMediaType mediaTypeOut = null;
        IMFAttributes attributes = null;

        int hr = 0;

        if (Succeeded(hr)) hr = (int)MFExtern.MFCreateAttributes(out attributes, 1);
        if (Succeeded(hr)) hr = (int)attributes.SetUINT32(MFAttributesClsid.MF_READWRITE_ENABLE_HARDWARE_TRANSFORMS, 1);
        if (Succeeded(hr)) hr = (int)attributes.SetUINT32(MFAttributesClsid.MF_SINK_WRITER_DISABLE_THROTTLING, 1);
        if (Succeeded(hr)) hr = (int)attributes.SetUINT32(MFAttributesClsid.MF_LOW_LATENCY, 1);

        // Create the sink writer 
        if (Succeeded(hr)) hr = (int)MFExtern.MFCreateSinkWriterFromURL(outputFile, null, attributes, out sinkWriter);

        // Create the output type
        if (Succeeded(hr)) hr = (int)MFExtern.MFCreateMediaType(out mediaTypeOut);
        if (Succeeded(hr)) hr = (int)mediaTypeOut.SetGUID(MFAttributesClsid.MF_MT_MAJOR_TYPE, MFMediaType.Video);
        if (Succeeded(hr)) hr = (int)mediaTypeOut.SetGUID(MFAttributesClsid.MF_TRANSCODE_CONTAINERTYPE, MFTranscodeContainerType.MPEG4);
        if (Succeeded(hr)) hr = (int)mediaTypeOut.SetGUID(MFAttributesClsid.MF_MT_SUBTYPE, MFMediaType.H264);
        if (Succeeded(hr)) hr = (int)mediaTypeOut.SetUINT32(MFAttributesClsid.MF_MT_AVG_BITRATE, videoBitRate);
        if (Succeeded(hr)) hr = (int)mediaTypeOut.SetUINT32(MFAttributesClsid.MF_MT_INTERLACE_MODE, (int)MFVideoInterlaceMode.Progressive);
        if (Succeeded(hr)) hr = (int)MFExtern.MFSetAttributeSize(mediaTypeOut, MFAttributesClsid.MF_MT_FRAME_SIZE, videoWidth, videoHeight);
        if (Succeeded(hr)) hr = (int)MFExtern.MFSetAttributeRatio(mediaTypeOut, MFAttributesClsid.MF_MT_FRAME_RATE, VIDEO_FPS, 1);
        if (Succeeded(hr)) hr = (int)MFExtern.MFSetAttributeRatio(mediaTypeOut, MFAttributesClsid.MF_MT_PIXEL_ASPECT_RATIO, 1, 1);
        if (Succeeded(hr)) hr = (int)sinkWriter.AddStream(mediaTypeOut, out streamIndex);

        // Create the input type 
        if (Succeeded(hr)) hr = (int)MFExtern.MFCreateMediaType(out mediaTypeIn);
        if (Succeeded(hr)) hr = (int)mediaTypeIn.SetGUID(MFAttributesClsid.MF_MT_MAJOR_TYPE, MFMediaType.Video);
        if (Succeeded(hr)) hr = (int)mediaTypeIn.SetGUID(MFAttributesClsid.MF_MT_SUBTYPE, MFMediaType.RGB32);
        if (Succeeded(hr)) hr = (int)mediaTypeIn.SetUINT32(MFAttributesClsid.MF_MT_INTERLACE_MODE, (int)MFVideoInterlaceMode.Progressive);
        if (Succeeded(hr)) hr = (int)MFExtern.MFSetAttributeSize(mediaTypeIn, MFAttributesClsid.MF_MT_FRAME_SIZE, videoWidth, videoHeight);
        if (Succeeded(hr)) hr = (int)MFExtern.MFSetAttributeRatio(mediaTypeIn, MFAttributesClsid.MF_MT_FRAME_RATE, VIDEO_FPS, 1);
        if (Succeeded(hr)) hr = (int)MFExtern.MFSetAttributeRatio(mediaTypeIn, MFAttributesClsid.MF_MT_PIXEL_ASPECT_RATIO, 1, 1);
        if (Succeeded(hr)) hr = (int)sinkWriter.SetInputMediaType(streamIndex, mediaTypeIn, null);


        // Start accepting data
        if (Succeeded(hr)) hr = (int)sinkWriter.BeginWriting();


        COMBase.SafeRelease(mediaTypeOut);
        COMBase.SafeRelease(mediaTypeIn);


        return hr;
    }

 IMFSample sample = null;
        IMFMediaBuffer buffer = null;


        IntPtr data = new IntPtr();
        int bufferMaxLength;
        int bufferCurrentLength;

        int hr = (int)MFExtern.MFCreateMemoryBuffer(frameSizeBytes, out buffer);

        if (Succeeded(hr)) hr = (int)buffer.Lock(out data, out bufferMaxLength, out bufferCurrentLength);
        if (Succeeded(hr))
        {
                hr = (int)MFExtern.MFCopyImage(
                    data,                                       // Destination buffer.
                    videoWidth * BYTES_PER_PIXEL,               // Destination stride.
                    (IntPtr)(frame.frame.DataPointer + (videoHeight - 1) * frame.frame.RowPitch),                    // First row in source image.
                    -frame.frame.RowPitch,                       // Source stride.
                    videoWidth * BYTES_PER_PIXEL,               // Destination stride.
                    videoHeight                                 // Image height in pixels
                    );
        }

        if (Succeeded(hr)) hr = (int)buffer.Unlock();
        if (Succeeded(hr)) hr = (int)buffer.SetCurrentLength(frameSizeBytes);
        if (Succeeded(hr)) hr = (int)MFExtern.MFCreateSample(out sample);
        if (Succeeded(hr)) hr = (int)sample.AddBuffer(buffer);
        if (Succeeded(hr)) hr = (int)sample.SetSampleTime(frame.prevRecordingDuration);
        if (Succeeded(hr)) hr = (int)sample.SetSampleDuration((frame.recordDuration-frame.prevRecordingDuration));

        if (Succeeded(hr)) hr = (int)sinkWriter.WriteSample(streamIndex, sample);

        COMBase.SafeRelease(sample);
        COMBase.SafeRelease(buffer);

当我注释掉

if（succeed（hr））hr=（int）sinkWriter.WriteSample（streamIndex，sample）

CPU只得到10%以下，但当我激活writesample时，它上升到50%。有人能帮我如何使用硬件编码吗？谢谢，我正在使用c#。
您需要添加Direct3D 9或11纹理样本。由您创建或由IMFVideoSampleAllocator（Ex）分配。检查此项：是的，我正在为编写器提供directx纹理。我可以产生一个视频没有问题，除了高CPU使用率。我尝试将H.264更改为NV12，但我的输出文件变大，几乎达到1G，无法播放。不，您没有。您使用MFCreateMoryBuffer。嗨，对不起，我是DirectX编程新手。这是我在frame.frame varibale设备.ImmediateContext.MapSubresource上传递的内容（screenTexture，0，SharpDX.Direct3D11.MapMode.Read，SharpDX.Direct3D11.MapFlags.None）；我也不知道该如何实施你的建议，因为这是我第一次使用这种应用程序。感谢幸运的是，MFCreateDXSurfaceBuffer在Mediafoundation.Net上不可用，该代码的包装器尚未实现。这方面有什么工作吗？