Super resolution processing of the first frame goes infinite time

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I got opencv super resolution example from “..\opencv\samples\gpu\super_resolution.cpp”. Copied, and pasted to the main of the empty project. Put my own inputVideoName and inputVideoName. Input video is 248x248 px. Program runs well until it’s getting to the line:

MEASURE_TIME(superRes->nextFrame(result));

Then just nothing happens! Processing of the first frame goes infinite time. I can’t get inside of this "nextFrame()" to figure out the problem.
How to fix this and to see a results of opencv super resolution algorithm?