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wow!! I'm lost in the doc.

I found that CV_CAP_DSHOW and CV_CAP_VFW are available in 2.4.11 C Api too. In 3.0.0, CPP Api provides CAP_DSHOW and CAP_VFW (some refs to old CV_CAP_* still here).

• In 2.4.11 the feature works but I can't find any reference around VideoCapture doc. Why ? may be it's unstable feature ? it's just a missing doc ? I'm lost in the doc ?
• In 3.0.0 there is some hint

Now I know that:

VideoCapture cap(0 + CV_CAP_VFW);    // opens cam 0 with platform native
VideoCapture cap(0 + CV_CAP_DSHOW);  // opens cam 0 with  DirectShow (via videoInput)
VideoCapture cap(0 );                // opens cam 0 with with default driver maybe one of above

this works with 2.4.10 too

Just to know...On my computer if I use VideoCapture cap(0 + CV_CAP_DSHOW); I can set some props via cap.set(CV_CAP_PROP_* that doesn't have effect when I use VideoCapture cap(0 + CV_CAP_VFW);

One of this is CAP_PROP_SETTINGS that shows the driver's property page but also CV_CAP_PROP_FPS is effective and it has effect on grab loop! this is completely different from what I said in a my recent answer :(

It's never to late to learn something !