Add default global scale if missing

Signed-off-by: Éloïse Brosseau <[email protected]>

src/plugins/rv-packages/otio_reader/annotation_hook.py

@@ -58,6 +58,14 @@ def hook_function(in_timeline, argument_map=None) -> None:
             )
 
             global_scale = argument_map.get("global_scale")
+            if global_scale is None:
+                first_source_node = commands.sourcesAtFrame(0)[0]
+                media_info = commands.sourceMediaInfo(first_source_node)
+                height = media_info["height"]
+                aspect_ratio = media_info["width"] / height
+                scale = aspect_ratio / 16
+                global_scale = otio.schema.V2d(scale, scale)
+
             points_property = f"{pen_component}.points"
             width_property = f"{pen_component}.width"