https://learn.microsoft.com/en-us/windows/win32/api/d3d11/nf-d3d11-id3d11videocontext-videoprocessorsetstreamstereoformat
ID3D11VideoContext::VideoProcessorSetStreamStereoFormat (d3d11.h) - Win32 apps | Microsoft Learn
Enables or disables stereo 3D video for an input stream on the video processor.
happsmicrosoftlearn