diff --git a/comfy_extras/nodes_wan.py b/comfy_extras/nodes_wan.py
index 3e5fef535..9cca6fb2e 100644
--- a/comfy_extras/nodes_wan.py
+++ b/comfy_extras/nodes_wan.py
@@ -1127,6 +1127,8 @@ class WanAnimateToVideo(io.ComfyNode):
                 io.Image.Input("face_video", optional=True),
                 io.Image.Input("pose_video", optional=True),
                 io.Int.Input("continue_motion_max_frames", default=5, min=1, max=nodes.MAX_RESOLUTION, step=4),
+                io.Image.Input("background_video", optional=True),
+                io.Mask.Input("character_mask", optional=True),
                 io.Image.Input("continue_motion", optional=True),
                 io.Int.Input("video_frame_offset", default=0, min=0, max=nodes.MAX_RESOLUTION, step=1, tooltip="The amount of frames to seek in all the input videos. Used for generating longer videos by chunk. Connect to the video_frame_offset output of the previous node for extending a video."),
             ],
@@ -1142,7 +1144,7 @@ class WanAnimateToVideo(io.ComfyNode):
         )
 
     @classmethod
-    def execute(cls, positive, negative, vae, width, height, length, batch_size, continue_motion_max_frames, video_frame_offset, reference_image=None, clip_vision_output=None, face_video=None, pose_video=None, continue_motion=None) -> io.NodeOutput:
+    def execute(cls, positive, negative, vae, width, height, length, batch_size, continue_motion_max_frames, video_frame_offset, reference_image=None, clip_vision_output=None, face_video=None, pose_video=None, continue_motion=None, background_video=None, character_mask=None) -> io.NodeOutput:
         trim_to_pose_video = False
         latent_length = ((length - 1) // 4) + 1
         latent_width = width // 8
@@ -1154,7 +1156,7 @@ class WanAnimateToVideo(io.ComfyNode):
 
         image = comfy.utils.common_upscale(reference_image[:length].movedim(-1, 1), width, height, "area", "center").movedim(1, -1)
         concat_latent_image = vae.encode(image[:, :, :, :3])
-        mask = torch.zeros((1, 1, concat_latent_image.shape[2], concat_latent_image.shape[-2], concat_latent_image.shape[-1]), device=concat_latent_image.device, dtype=concat_latent_image.dtype)
+        mask = torch.zeros((1, 4, concat_latent_image.shape[-3], concat_latent_image.shape[-2], concat_latent_image.shape[-1]), device=concat_latent_image.device, dtype=concat_latent_image.dtype)
         trim_latent += concat_latent_image.shape[2]
         ref_motion_latent_length = 0
 
@@ -1206,11 +1208,37 @@ class WanAnimateToVideo(io.ComfyNode):
             positive = node_helpers.conditioning_set_values(positive, {"face_video_pixels": face_video})
             negative = node_helpers.conditioning_set_values(negative, {"face_video_pixels": face_video * 0.0 - 1.0})
 
-        concat_latent_image = torch.cat((concat_latent_image, vae.encode(image[:, :, :, :3])), dim=2)
-        mask_refmotion = torch.ones((1, 1, latent_length, concat_latent_image.shape[-2], concat_latent_image.shape[-1]), device=mask.device, dtype=mask.dtype)
-        if continue_motion is not None:
-            mask_refmotion[:, :, :ref_motion_latent_length] = 0.0
+        ref_images_num = max(0, ref_motion_latent_length * 4 - 3)
+        if background_video is not None:
+            if background_video.shape[0] > video_frame_offset:
+                background_video = background_video[video_frame_offset:]
+                background_video = comfy.utils.common_upscale(background_video[:length].movedim(-1, 1), width, height, "area", "center").movedim(1, -1)
+                if background_video.shape[0] > ref_images_num:
+                    image[ref_images_num:background_video.shape[0] - ref_images_num] = background_video[ref_images_num:]
 
+        mask_refmotion = torch.ones((1, 1, latent_length * 4, concat_latent_image.shape[-2], concat_latent_image.shape[-1]), device=mask.device, dtype=mask.dtype)
+        if continue_motion is not None:
+            mask_refmotion[:, :, :ref_motion_latent_length * 4] = 0.0
+
+        if character_mask is not None:
+            if character_mask.shape[0] > video_frame_offset or character_mask.shape[0] == 1:
+                if character_mask.shape[0] == 1:
+                    character_mask = character_mask.repeat((length,) + (1,) * (character_mask.ndim - 1))
+                else:
+                    character_mask = character_mask[video_frame_offset:]
+                if character_mask.ndim == 3:
+                    character_mask = character_mask.unsqueeze(1)
+                    character_mask = character_mask.movedim(0, 1)
+                if character_mask.ndim == 4:
+                    character_mask = character_mask.unsqueeze(1)
+                character_mask = comfy.utils.common_upscale(character_mask[:, :, :length], concat_latent_image.shape[-1], concat_latent_image.shape[-2], "nearest-exact", "center")
+                if character_mask.shape[2] > ref_images_num:
+                    mask_refmotion[:, :, ref_images_num:character_mask.shape[2] + ref_images_num] = character_mask[:, :, ref_images_num:]
+
+        concat_latent_image = torch.cat((concat_latent_image, vae.encode(image[:, :, :, :3])), dim=2)
+
+
+        mask_refmotion = mask_refmotion.view(1, mask_refmotion.shape[2] // 4, 4, mask_refmotion.shape[3], mask_refmotion.shape[4]).transpose(1, 2)
         mask = torch.cat((mask, mask_refmotion), dim=2)
         positive = node_helpers.conditioning_set_values(positive, {"concat_latent_image": concat_latent_image, "concat_mask": mask})
         negative = node_helpers.conditioning_set_values(negative, {"concat_latent_image": concat_latent_image, "concat_mask": mask})