Merge pull request #16953 from mshabunin:fix-msmf-writer-fps

modules/videoio/src/cap_msmf.cpp

@@ -1566,7 +1566,7 @@ bool CvVideoWriter_MSMF::open( const cv::String& filename, int fourcc,
         SUCCEEDED(mediaTypeOut->SetUINT32(MF_MT_AVG_BITRATE, bitRate)) &&
         SUCCEEDED(mediaTypeOut->SetUINT32(MF_MT_INTERLACE_MODE, MFVideoInterlace_Progressive)) &&
         SUCCEEDED(MFSetAttributeSize(mediaTypeOut.Get(), MF_MT_FRAME_SIZE, videoWidth, videoHeight)) &&
-        SUCCEEDED(MFSetAttributeRatio(mediaTypeOut.Get(), MF_MT_FRAME_RATE, (UINT32)fps, 1)) &&
+        SUCCEEDED(MFSetAttributeRatio(mediaTypeOut.Get(), MF_MT_FRAME_RATE, (UINT32)(fps * 1000), 1000)) &&
         SUCCEEDED(MFSetAttributeRatio(mediaTypeOut.Get(), MF_MT_PIXEL_ASPECT_RATIO, 1, 1)) &&
         // Set the input media type.
         SUCCEEDED(MFCreateMediaType(&mediaTypeIn)) &&
@@ -1575,7 +1575,7 @@ bool CvVideoWriter_MSMF::open( const cv::String& filename, int fourcc,
         SUCCEEDED(mediaTypeIn->SetUINT32(MF_MT_INTERLACE_MODE, MFVideoInterlace_Progressive)) &&
         SUCCEEDED(mediaTypeIn->SetUINT32(MF_MT_DEFAULT_STRIDE, 4 * videoWidth)) && //Assume BGR32 input
         SUCCEEDED(MFSetAttributeSize(mediaTypeIn.Get(), MF_MT_FRAME_SIZE, videoWidth, videoHeight)) &&
-        SUCCEEDED(MFSetAttributeRatio(mediaTypeIn.Get(), MF_MT_FRAME_RATE, (UINT32)fps, 1)) &&
+        SUCCEEDED(MFSetAttributeRatio(mediaTypeIn.Get(), MF_MT_FRAME_RATE, (UINT32)(fps * 1000), 1000)) &&
         SUCCEEDED(MFSetAttributeRatio(mediaTypeIn.Get(), MF_MT_PIXEL_ASPECT_RATIO, 1, 1)) &&
         // Set sink writer parameters
         SUCCEEDED(MFCreateAttributes(&spAttr, 10)) &&
@@ -1596,7 +1596,7 @@ bool CvVideoWriter_MSMF::open( const cv::String& filename, int fourcc,
             {
                 initiated = true;
                 rtStart = 0;
-                MFFrameRateToAverageTimePerFrame((UINT32)fps, 1, &rtDuration);
+                MFFrameRateToAverageTimePerFrame((UINT32)(fps * 1000), 1000, &rtDuration);
                 return true;
             }
         }