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fix: lexicographic file sort misorders numbered frames #54

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fix: lexicographic file sort misorders numbered frames #54

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22 changes: 21 additions & 1 deletion scripts/convert_to_lerobot.py
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Original file line number Diff line number Diff line change
Expand Up @@ -29,9 +29,29 @@
def get_subdirectories(path: Path) -> list[Path]:
return sorted([p for p in path.iterdir() if p.is_dir()])


# Get the paths of files within a directory.
def _natural_sort_key(path: Path):
name = path.name
key = []
i = 0
while i < len(name):
if name[i].isdigit():
j = i
while j < len(name) and name[j].isdigit():
j += 1
key.append((0, int(name[i:j])))
i = j
else:
j = i
while j < len(name) and not name[j].isdigit():
j += 1
key.append((1, name[i:j].lower()))
i = j
return key

def get_files_in_dir(path: Path) -> list[Path]:
return sorted([p for p in path.iterdir() if p.is_file()])
return sorted([p for p in path.iterdir() if p.is_file()], key=_natural_sort_key)

# Read an image file into a numpy array.
def load_image(file_path: Path) -> np.ndarray:
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