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Fix: Handle empty masks in get_mask_boxes to prevent crash #328

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Fix: Handle empty masks in get_mask_boxes to prevent crash #328

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7 changes: 7 additions & 0 deletions wan/modules/animate/preprocess/utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,13 @@ def get_mask_boxes(mask):

"""
y_coords, x_coords = np.nonzero(mask)

# Handle empty mask: return full frame fallback to prevent crash
if len(x_coords) == 0 or len(y_coords) == 0:
h, w = mask.shape
# Return a valid full-frame bounding box
return np.array([0, 0, w-1, h-1]).astype(np.int32)

x_min = x_coords.min()
x_max = x_coords.max()
y_min = y_coords.min()
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