[nodes] KeyframeSelection: Split rescaling parameter in two new ones

Split the existing "rescaledWidth" parameter into "rescaledWidthSharpness"
and "rescaledWidthFlow" to allow independent rescaling of the frames used
to compute the sharpness and motion scores.

meshroom/nodes/aliceVision/KeyframeSelection.py

@@ -160,9 +160,21 @@ class KeyframeSelection(desc.AVCommandLineNode):
                             enabled=lambda node: node.smartSelection.enabled
                         ),
                         desc.IntParam(
-                            name="rescaledWidth",
-                            label="Rescaled Frame's Width",
-                            description="Width, in pixels, of the frame after a rescale. Aspect ratio will be preserved. No rescale will be performed if equal to 0.",
+                            name="rescaledWidthSharpness",
+                            label="Rescaled Frame's Width For Sharpness",
+                            description="Width, in pixels, of the frame used for the sharpness score computation after a rescale.\n"
+                                        "Aspect ratio will be preserved. No rescale will be performed if equal to 0.",
+                            value=720,
+                            range=(0, 4000, 1),
+                            uid=[0],
+                            enabled=lambda node: node.smartSelection.enabled,
+                            advanced=True
+                        ),
+                        desc.IntParam(
+                            name="rescaledWidthFlow",
+                            label="Rescaled Frame's Width For Motion",
+                            description="Width, in pixels, of the frame used for the motion score computation after a rescale.\n"
+                                        "Aspect ratio will be preserved. No rescale will be performed if equal to 0.",
                             value=720,
                             range=(0, 4000, 1),
                             uid=[0],