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Merge pull request #20327 from tibaes:MSMF-Slow-Webcam-Startup

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* fixes MSMF slow webcam startup

* add variable to change MF_READWRITE_ENABLE_HARDWARE_TRANSFORMS at runtime
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Rafael H Tibães authored and GitHub committed 2021-06-30 22:08:24 +00:00
1 parent fb7ef76e74
commit bf489feef1
1 file changed
+2 -1
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modules/videoio/src/cap_msmf.cpp
+2 -1
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@@ -708,9 +708,10 @@ bool CvCapture_MSMF::initStream(DWORD streamID, const MediaType& mt)
_ComPtr<IMFAttributes> CvCapture_MSMF::getDefaultSourceConfig(UINT32 num)
{
CV_Assert(num > 0);
const bool OPENCV_VIDEOIO_MSMF_ENABLE_HW_TRANSFORMS = utils::getConfigurationParameterBool("OPENCV_VIDEOIO_MSMF_ENABLE_HW_TRANSFORMS", true);
_ComPtr<IMFAttributes> res;
if (FAILED(MFCreateAttributes(&res, num)) ||
FAILED(res->SetUINT32(MF_READWRITE_ENABLE_HARDWARE_TRANSFORMS, true)) ||
FAILED(res->SetUINT32(MF_READWRITE_ENABLE_HARDWARE_TRANSFORMS, OPENCV_VIDEOIO_MSMF_ENABLE_HW_TRANSFORMS)) ||
FAILED(res->SetUINT32(MF_SOURCE_READER_DISABLE_DXVA, false)) ||
FAILED(res->SetUINT32(MF_SOURCE_READER_ENABLE_VIDEO_PROCESSING, false)) ||
FAILED(res->SetUINT32(MF_SOURCE_READER_ENABLE_ADVANCED_VIDEO_PROCESSING, true))