How to save mesh without background？

[hicookie77]

When I add the command（--empty_bg）, I get the following error：
Traceback (most recent call last):
File "/home/xu/anaconda3/envs/pymafx/lib/python3.8/runpy.py", line 194, in _run_module_as_main
return _run_code(code, main_globals, None,
File "/home/xu/anaconda3/envs/pymafx/lib/python3.8/runpy.py", line 87, in _run_code
exec(code, run_globals)
File "/home/xu/PyMAF/apps/demo_smplx.py", line 605, in
run_demo(args)
File "/home/xu/PyMAF/apps/demo_smplx.py", line 457, in run_demo
img, empty_img = renderer(
ValueError: too many values to unpack (expected 2)

In addition, when I add the incomplete original image of the human body, the following error occurs, how should I solve it.

Traceback (most recent call last):
File "/home/xu/anaconda3/envs/pymafx/lib/python3.8/runpy.py", line 194, in _run_module_as_main
return _run_code(code, main_globals, None,
File "/home/xu/anaconda3/envs/pymafx/lib/python3.8/runpy.py", line 87, in _run_code
exec(code, run_globals)
File "/home/xu/PyMAF/apps/demo_smplx.py", line 605, in
run_demo(args)
File "/home/xu/PyMAF/apps/demo_smplx.py", line 308, in run_demo
for batch in tqdm(dataloader):
File "/home/xu/anaconda3/envs/pymafx/lib/python3.8/site-packages/tqdm/std.py", line 1178, in iter
for obj in iterable:
File "/home/xu/anaconda3/envs/pymafx/lib/python3.8/site-packages/torch/utils/data/dataloader.py", line 521, in next
data = self._next_data()
File "/home/xu/anaconda3/envs/pymafx/lib/python3.8/site-packages/torch/utils/data/dataloader.py", line 1203, in _next_data
return self._process_data(data)
File "/home/xu/anaconda3/envs/pymafx/lib/python3.8/site-packages/torch/utils/data/dataloader.py", line 1229, in _process_data
data.reraise()
File "/home/xu/anaconda3/envs/pymafx/lib/python3.8/site-packages/torch/_utils.py", line 425, in reraise
raise self.exc_type(msg)
ValueError: Caught ValueError in DataLoader worker process 0.
Original Traceback (most recent call last):
File "/home/xu/anaconda3/envs/pymafx/lib/python3.8/site-packages/torch/utils/data/_utils/worker.py", line 287, in _worker_loop
data = fetcher.fetch(index)
File "/home/xu/anaconda3/envs/pymafx/lib/python3.8/site-packages/torch/utils/data/_utils/fetch.py", line 44, in fetch
data = [self.dataset[idx] for idx in possibly_batched_index]
File "/home/xu/anaconda3/envs/pymafx/lib/python3.8/site-packages/torch/utils/data/_utils/fetch.py", line 44, in
data = [self.dataset[idx] for idx in possibly_batched_index]
File "/home/xu/PyMAF/datasets/inference.py", line 291, in getitem
img_part, _, crop_shape = self.rgb_processing(img_orig, center_part, scale_part, [constants.IMG_RES, constants.IMG_RES])
File "/home/xu/PyMAF/datasets/inference.py", line 124, in rgb_processing
crop_img_resized, crop_img, crop_shape = crop(rgb_img, center, scale, res, rot=rot)
File "/home/xu/PyMAF/utils/imutils.py", line 89, in crop
new_img[new_y[0]:new_y[1], new_x[0]:new_x[1]] = img[old_y[0]:old_y[1],
ValueError: could not broadcast input array from shape (7,63,3) into shape (7,0,3)