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我試圖在Windows Phone 8.1中使用Media Foundation庫和接收器編碼器對視頻進行編碼。Windows Phone 8.1媒體基金會H264最高分辨率
我已經能夠通過我的媒體輸出設置MFVideoFormat_H264
爲MF_MT_SUBTYPE
和使用像720p和480p的分辨率達到這個..
但是,當我更改分辨率1920×1080(1920×1088或)我得到一個錯誤Incorrect Parameter
。所以我想我的H.264編解碼器的最大分辨率是1280x720。
我試着將編解碼器更改爲HVEC或MPEG2等......但沒有運氣。
這是CPP代碼,我設置輸出類型和它添加到流:
// Setup the output video type
ComPtr<IMFMediaType> spvideoTypeOut;
CHK(MFCreateMediaType(&spvideoTypeOut));
CHK(spvideoTypeOut->SetGUID(MF_MT_MAJOR_TYPE, MFMediaType_Video));
GUID _vformat = MFVideoFormat_H264;
CHK(spvideoTypeOut->SetGUID(MF_MT_SUBTYPE, _vformat));
CHK(spvideoTypeOut->SetUINT32(MF_MT_AVG_BITRATE, _bitrate));
CHK(spvideoTypeOut->SetUINT32(MF_MT_INTERLACE_MODE, MFVideoInterlace_Progressive));
CHK(MFSetAttributeSize(spvideoTypeOut.Get(), MF_MT_FRAME_SIZE, _width, _height));
CHK(MFSetAttributeRatio(spvideoTypeOut.Get(), MF_MT_FRAME_RATE, framerate, 1));
CHK(MFSetAttributeRatio(spvideoTypeOut.Get(), MF_MT_PIXEL_ASPECT_RATIO, ASPECT_NUM, ASPECT_DENOM));
CHK(_spSinkWriter->AddStream(spvideoTypeOut.Get(), &_streamIndex));
而這正是我設置輸入類型:
// Setup the input video type
ComPtr<IMFMediaType> spvideoTypeIn;
CHK(MFCreateMediaType(&spvideoTypeIn));
CHK(spvideoTypeIn->SetGUID(MF_MT_MAJOR_TYPE, MFMediaType_Video));
CHK(spvideoTypeIn->SetGUID(MF_MT_SUBTYPE, MFVideoFormat_RGB32));
CHK(spvideoTypeIn->SetUINT32(MF_MT_INTERLACE_MODE, MFVideoInterlace_Progressive));
CHK(MFSetAttributeSize(spvideoTypeIn.Get(), MF_MT_FRAME_SIZE, _width, _height));
CHK(MFSetAttributeRatio(spvideoTypeIn.Get(), MF_MT_FRAME_RATE, framerate, 1));
CHK(MFSetAttributeRatio(spvideoTypeIn.Get(), MF_MT_PIXEL_ASPECT_RATIO, ASPECT_NUM, ASPECT_DENOM));
CHK(_spSinkWriter->SetInputMediaType(_streamIndex, spvideoTypeIn.Get(), nullptr));
CHK(_spSinkWriter->BeginWriting());
要添加樣本下沉作家我使用這個功能,而這正是發生異常:
void PictureWriter::AddFrame(const Platform::Array<uint8>^ videoFrameBuffer, int imageWidth, int imageHeight)
{
// Create a media sample
ComPtr<IMFSample> spSample;
CHK(MFCreateSample(&spSample));
CHK(spSample->SetSampleDuration(_duration));
CHK(spSample->SetSampleTime(_hnsSampleTime));
_hnsSampleTime += _duration;
// Add a media buffer
ComPtr<IMFMediaBuffer> spBuffer;
CHK(MFCreateMemoryBuffer(_bufferLength, &spBuffer));
CHK(spBuffer->SetCurrentLength(_bufferLength));
CHK(spSample->AddBuffer(spBuffer.Get()));
// Copy the picture into the buffer
unsigned char *pbBuffer = nullptr;
CHK(spBuffer->Lock(&pbBuffer, nullptr, nullptr));
BYTE* buffer = (BYTE*)videoFrameBuffer->begin() + 4 * imageWidth * (imageHeight - 1);
CHK(MFCopyImage(pbBuffer + 4 * _width * (_height - imageHeight),
4 * _width, buffer, -4 * imageWidth, 4 * imageWidth, imageHeight));
CHK(spBuffer->Unlock());
// Write the media sample
CHK(_spSinkWriter->WriteSample(_streamIndex, spSample.Get()));
}
爲什麼你認爲我得到了異常,我該如何解決這個問題?
謝謝。
如何在接收器編寫器的AddStream中設置媒體類型?你有沒有嘗試在其中指定高配置文件? – VuVirt
我添加了所有與此問題相關的代碼。不,我不知道該怎麼做。 –
您可以嘗試添加:spvideoTypeOut-> SetUINT32(MF_MT_MPEG2_PROFILE,eAVEncH264VProfile_High); – VuVirt