diff --git a/__init__.py b/__init__.py
index 1c472c3..e3116e4 100644
--- a/__init__.py
+++ b/__init__.py
@@ -20,7 +20,7 @@ bl_info = {
     "name": "Compify",
     "version": (0, 1, 0),
     "author": "Nathan Vegdahl, Ian Hubert",
-    "blender": (3, 4, 0),
+    "blender": (4, 0, 0),
     "description": "Do compositing in 3D space.",
     "location": "Scene properties",
     # "doc_url": "",
@@ -207,7 +207,13 @@ def create_compify_material(name, camera, footage):
 
     # Configure the nodes.
     camera_project.node_tree = ensure_camera_project_group(camera)
-    camera_project.inputs['Aspect Ratio'].default_value = footage.size[0] / footage.size[1]
+    if footage.size[0] > 0 and footage.size[1] > 0:
+        camera_project.inputs['Aspect Ratio'].default_value = footage.size[0] / footage.size[1]
+    else:
+        # Default to the output render aspect ratio if we're on a bogus footage frame.
+        render_x = bpy.context.scene.render.resolution_x * bpy.context.scene.render.pixel_aspect_x
+        render_y = bpy.context.scene.render.resolution_y * bpy.context.scene.render.pixel_aspect_y
+        camera_project.inputs['Aspect Ratio'].default_value = render_x / render_y
 
     baking_uv_map.uv_map = UV_LAYER_NAME
 
diff --git a/node_groups.py b/node_groups.py
index 944046d..297e2d7 100644
--- a/node_groups.py
+++ b/node_groups.py
@@ -15,49 +15,49 @@ def ensure_footage_group():
         group.nodes.remove(node)
 
     # Create the group inputs and outputs.
-    group.inputs.new(type="NodeSocketColor", name="Footage")
-    group.inputs['Footage'].default_value = (1.0, 0.0, 1.0, 1.0)
-    group.inputs['Footage'].hide_value = True
+    socket = group.interface.new_socket(name="Footage", socket_type="NodeSocketColor", in_out='INPUT')
+    socket.default_value = (1.0, 0.0, 1.0, 1.0)
+    socket.hide_value = True
 
-    group.inputs.new(type="NodeSocketFloat", name="Footage Alpha")
-    group.inputs['Footage Alpha'].default_value = 1.0
-    group.inputs['Footage Alpha'].min_value = 0.0
-    group.inputs['Footage Alpha'].max_value = 1.0
+    socket = group.interface.new_socket(name="Footage Alpha", socket_type="NodeSocketFloat", in_out='INPUT')
+    socket.default_value = 1.0
+    socket.min_value = 0.0
+    socket.max_value = 1.0
 
-    group.inputs.new(type="NodeSocketFloat", name="Footage Emit")
-    group.inputs['Footage Emit'].default_value = 0.0
-    group.inputs['Footage Emit'].min_value = 0.0
-    group.inputs['Footage Emit'].max_value = 1.0
+    socket = group.interface.new_socket(name="Footage Emit", socket_type="NodeSocketFloat", in_out='INPUT')
+    socket.default_value = 0.0
+    socket.min_value = 0.0
+    socket.max_value = 1.0
 
-    group.inputs.new(type="NodeSocketColor", name="Background")
-    group.inputs['Background'].default_value = (1.0, 0.0, 1.0, 1.0)
-    group.inputs['Background'].hide_value = True
+    socket = group.interface.new_socket(name="Background", socket_type="NodeSocketColor", in_out='INPUT')
+    socket.default_value = (1.0, 0.0, 1.0, 1.0)
+    socket.hide_value = True
 
-    group.inputs.new(type="NodeSocketFloat", name="Background Alpha")
-    group.inputs['Background Alpha'].default_value = 0.0
-    group.inputs['Background Alpha'].min_value = 0.0
-    group.inputs['Background Alpha'].max_value = 1.0
+    socket = group.interface.new_socket(name="Background Alpha", socket_type="NodeSocketFloat", in_out='INPUT')
+    socket.default_value = 0.0
+    socket.min_value = 0.0
+    socket.max_value = 1.0
 
-    group.inputs.new(type="NodeSocketFloat", name="Background Emit")
-    group.inputs['Background Emit'].default_value = 0.0
-    group.inputs['Background Emit'].min_value = 0.0
-    group.inputs['Background Emit'].max_value = 1.0
+    socket = group.interface.new_socket(name="Background Emit", socket_type="NodeSocketFloat", in_out='INPUT')
+    socket.default_value = 0.0
+    socket.min_value = 0.0
+    socket.max_value = 1.0
 
-    group.inputs.new(type="NodeSocketColor", name="Baked Lighting")
-    group.inputs['Baked Lighting'].default_value = (1.0, 1.0, 1.0, 1.0)
-    group.inputs['Baked Lighting'].hide_value = True
+    socket = group.interface.new_socket(name="Baked Lighting", socket_type="NodeSocketColor", in_out='INPUT')
+    socket.default_value = (1.0, 1.0, 1.0, 1.0)
+    socket.hide_value = True
 
-    group.inputs.new(type="NodeSocketFloat", name="Do Bake")
-    group.inputs['Do Bake'].default_value = 0.0
-    group.inputs['Do Bake'].min_value = 0.0
-    group.inputs['Do Bake'].max_value = 1.0
+    socket = group.interface.new_socket(name="Do Bake", socket_type="NodeSocketFloat", in_out='INPUT')
+    socket.default_value = 0.0
+    socket.min_value = 0.0
+    socket.max_value = 1.0
 
-    group.inputs.new(type="NodeSocketFloat", name="Debug")
-    group.inputs['Debug'].default_value = 0.0
-    group.inputs['Debug'].min_value = 0.0
-    group.inputs['Debug'].max_value = 1.0
+    socket = group.interface.new_socket(name="Debug", socket_type="NodeSocketFloat", in_out='INPUT')
+    socket.default_value = 0.0
+    socket.min_value = 0.0
+    socket.max_value = 1.0
 
-    group.outputs.new(type="NodeSocketShader", name="Shader")
+    group.interface.new_socket(name="Shader", socket_type="NodeSocketShader", in_out='OUTPUT')
 
     #-------------------
     # Footage nodes.
@@ -419,19 +419,19 @@ def ensure_feathered_square_group():
         group.nodes.remove(node)
     
     # Create the group inputs and outputs.
-    group.inputs.new(type="NodeSocketVector", name="Vector")
+    group.interface.new_socket(name="Vector", socket_type="NodeSocketVector", in_out='INPUT')
     
-    group.inputs.new(type="NodeSocketFloat", name="Feather")
-    group.inputs['Feather'].default_value = 0.0
-    group.inputs['Feather'].min_value = 0.0
-    group.inputs['Feather'].max_value = 1.0
+    socket = group.interface.new_socket(name="Feather", socket_type="NodeSocketFloat", in_out='INPUT')
+    socket.default_value = 0.0
+    socket.min_value = 0.0
+    socket.max_value = 1.0
     
-    group.inputs.new(type="NodeSocketFloat", name="Dilate")
-    group.inputs['Dilate'].default_value = 0.0
-    group.inputs['Dilate'].min_value = 0.0
-    group.inputs['Dilate'].max_value = 0.1
+    socket = group.interface.new_socket(name="Dilate", socket_type="NodeSocketFloat", in_out='INPUT')
+    socket.default_value = 0.0
+    socket.min_value = 0.0
+    socket.max_value = 0.1
     
-    group.outputs.new(type="NodeSocketFloat", name="Value")
+    group.interface.new_socket(name="Value", socket_type="NodeSocketFloat", in_out='OUTPUT')
 
     #-------------------
     # Create the nodes.
@@ -627,18 +627,20 @@ def ensure_camera_project_group(camera, default_aspect=1.0):
     for node in group.nodes:
         group.nodes.remove(node)
 
-    # Create the group inputs and outputs.
-    if not "Aspect Ratio" in group.inputs:
-        group.inputs.new(type="NodeSocketFloat", name="Aspect Ratio")
-        group.inputs['Aspect Ratio'].default_value = default_aspect
-    if not "Rotation" in group.inputs:
-        group.inputs.new(type="NodeSocketFloat", name="Rotation")
-    if not "Loc X" in group.inputs:
-        group.inputs.new(type="NodeSocketFloat", name="Loc X")
-    if not "Loc Y" in group.inputs:
-        group.inputs.new(type="NodeSocketFloat", name="Loc Y")
-    if not "Vector" in group.outputs:
-        group.outputs.new(type="NodeSocketVector", name="Vector")
+    # Create the group inputs.
+    if not "Aspect Ratio" in group.interface.items_tree:
+        socket = group.interface.new_socket(name="Aspect Ratio", socket_type='NodeSocketFloat', in_out='INPUT')
+        socket.default_value = default_aspect
+    if not "Rotation" in group.interface.items_tree:
+        group.interface.new_socket(name="Rotation", socket_type='NodeSocketFloat', in_out='INPUT')
+    if not "Loc X" in group.interface.items_tree:
+        group.interface.new_socket(name="Loc X", socket_type='NodeSocketFloat', in_out='INPUT')
+    if not "Loc Y" in group.interface.items_tree:
+        group.interface.new_socket(name="Loc Y", socket_type='NodeSocketFloat', in_out='INPUT')
+
+    # Create the group outputs.
+    if not "Vector" in group.interface.items_tree:
+        group.interface.new_socket(name="Vector", socket_type = 'NodeSocketVector', in_out='OUTPUT')
 
     #-------------------
     # Create the nodes.