[nodes] KeyframeSelection: Add support for several output file formats

Keyframes will be written as JPG, PNG or EXR files (by default, JPG).
If EXR is the selected output extension, the storage data type can also
be chosen.

meshroom/nodes/aliceVision/KeyframeSelection.py

@@ -193,6 +193,30 @@ You can extract frames at regular interval by configuring only the min/maxFrameS
                 )
             ]
         ),
+        desc.ChoiceParam(
+            name="outputExtension",
+            label="Keyframes File Extension",
+            description="File extension of the written keyframes.",
+            value="jpg",
+            values=["exr", "jpg", "png"],
+            exclusive=True,
+            uid=[0],
+        ),
+        desc.ChoiceParam(
+            name="storageDataType",
+            label="EXR Storage Data Type",
+            description="Storage image data type for keyframes written to EXR files:\n"
+                        " * float: Use full floating point (32 bits per channel)\n"
+                        " * half: Use half float (16 bits per channel)\n"
+                        " * halfFinite: Use half float, but clamp values to avoid non-finite values\n"
+                        " * auto: Use half float if all values can fit, else use full float\n",
+            value="float",
+            values=["float", "half", "halfFinite", "auto"],
+            exclusive=True,
+            uid=[0],
+            enabled=lambda node: node.outputExtension.value == "exr",
+            advanced=True
+        ),
         desc.GroupAttribute(
             name="debugOptions",
             label="Debug Options",