Merge remote-tracking branch 'upstream/3.4' into merge-3.4

samples/cpp/videocapture_gstreamer_pipeline.cpp

@@ -266,7 +266,10 @@ int main(int argc, char *argv[])
         cout << "Unsupported mode: " << mode << endl;
         return -1;
     }
-    file_name = samples::findFile(file_name);
+    if (mode == "decode")
+    {
+        file_name = samples::findFile(file_name);
+    }
     cout << "Mode: " << mode << ", Backend: " << backend << ", File: " << file_name << ", Codec: " << codec << endl;
 
     TickMeter total;

samples/cpp/videocapture_openni.cpp

@@ -177,7 +177,7 @@ int main( int argc, char* argv[] )
     else
         capture.set(CAP_OPENNI_IR_GENERATOR_PRESENT, false);
 
-    // Print some avalible device settings.
+    // Print some available device settings.
     if (capture.get(CAP_OPENNI_DEPTH_GENERATOR_PRESENT))
     {
         cout << "\nDepth generator output mode:" << endl <<