Media Foundation MFGetAttributeRatio works differently for Win 7 than WIn8 - how to set format?

Question

I am Using Media foundation ISourceReader, ISourceMedia etc.
My camera supports several Resolutions with 60 FPS and 30 FPS. running the code in win 8 I get a different profile with MAX 60 for the 60 and a different profile with max 30 for the 30 FPS. however running same code in WIN7 gives me that for all FPS I get
the 
Code:
Enumerating profiles, and stop at the profile that the desired FPS is the max FPS (as different profiles are returned for each FPS,and the max equals to the MAX_FPS).
for WIN8 following code works:
bool found=false;while(!found){HRESULT hr = m_reader->GetNativeMediaType(id,i,&pMediaType);
if (hr!=S_OK || pMediaType==NULL)
if(pMediaType)
pMediaType->Release();
break;
GUID subtype;
hr=pMediaType->GetGUID(MF_MT_SUBTYPE,&subtype);
frameRate frameRateMin;
frameRate frameRateMax;
MFGetAttributeSize(pMediaType, MF_MT_FRAME_SIZE, &currRes.width, &currRes.height);
MFGetAttributeRatio(pMediaType,MF_MT_FRAME_RATE_RANGE_MIN,&frameRateMin.numerator ,&frameRateMin.denominator);
MFGetAttributeRatio(pMediaType,MF_MT_FRAME_RATE_RANGE_MAX,&frameRateMax.numerator ,&frameRateMax.denominator);if(frameRateMax==desiredFPS)found =true;}HRESULT hr= m_reader->SetCurrentMediaType(0,0,pMediaType);
What I do see is that in WIn7 each profile is returned twice once with MF_MT_VIDEO_LIGHTING equals 0 and one with 3. but both profiles are with 60 FPS while no profile with 30 as I would expect.

Answer 1

Hello and welcome,
Rescue and Recovery should present an option for using a USB flash drive for recovery media.  You only get one shot at this so it's important to make sure the flash drive is prepared correctly - and is large enough.  Unfortunately I can't tell you the size drive you need.  32GB is plenty, 16GB is probably enough.  Hopefully someone who has done this on a T433s will chime in.
Drive prep: New or used USB memory keys or USB flash drives require an active partition created from within Wind...
You can use your one-time shot at making a recovery drive any time.  It will contain recovery tools and a from-factory recovery image, not a snapshot of your as-currently-configured machine.  For an as-running image use the backup feature of R&R.
IIRC you can launch the recovery media creator as a right-click option on the Q: partition - or double click it maybe.  That will also offer to delete Q: and add the space to C: - also IIRC.
Z.
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