feat: support video file as camera background images

multi_user/bl_types/bl_camera.py

@@ -56,6 +56,11 @@ class BlCamera(BlDatablock):
                     target_img.image = bpy.data.images[img_id]
                     loader.load(target_img, img_data)
 
+                    img_user = img_data.get('image_user')
+                    if img_user:
+                        loader.load(target_img.image_user, img_user)
+
+
     def _dump_implementation(self, data, instance=None):
         assert(instance)
 
@@ -101,10 +106,19 @@ class BlCamera(BlDatablock):
             'scale',
             'use_flip_x',
             'use_flip_y',
-            'image'
+            'image_user',
+            'image',
+            'frame_duration',
+            'frame_start',
+            'frame_offset',
+            'use_cyclic',
+            'use_auto_refresh'
         ]
-        return dumper.dump(instance)
-    
+        data =  dumper.dump(instance)
+        for index, image in enumerate(instance.background_images):
+            if image.image_user:
+                data['background_images'][index]['image_user'] = dumper.dump(image.image_user)
+        return data
     def _resolve_deps_implementation(self):
         deps = []
         for background in self.instance.background_images:

multi_user/bl_types/bl_image.py

@@ -66,9 +66,12 @@ class BlImage(BlDatablock):
         loader = Loader()
         loader.load(data, target)
 
-        target.source = 'FILE'
+        target.source = data['source']
         target.filepath_raw = get_filepath(data['filename'])
-        target.colorspace_settings.name = data["colorspace_settings"]["name"]
+        color_space_name = data["colorspace_settings"]["name"]
+
+        if color_space_name:
+            target.colorspace_settings.name = color_space_name
 
     def _dump(self, instance=None):
         assert(instance)
@@ -83,6 +86,7 @@ class BlImage(BlDatablock):
         dumper.depth = 2
         dumper.include_filter = [
             "name",
+            'source',
             'size',
             'height',
             'alpha',