Add script with autoscaling

script.py

@@ -0,0 +1,59 @@
+#!/usr/bin/env python3
+
+import argparse
+from pathlib import Path
+
+import img2pdf
+
+
+SUPPORTED_EXTENSIONS = {".jpg", ".jpeg", ".png"}
+
+
+def images_to_pdf(images: list[Path], output: Path) -> None:
+    # A4 page dimensions in PDF points (1 point = 1/72 inch).
+    a4_size = (img2pdf.mm_to_pt(210), img2pdf.mm_to_pt(297))
+
+    # Scale images proportionally to fit within A4 pages.
+    layout = img2pdf.get_layout_fun(
+        pagesize=a4_size,
+        fit=img2pdf.FitMode.into,
+        auto_orient=True,
+    )
+
+    with output.open("wb") as pdf_file:
+        pdf_file.write(
+            img2pdf.convert(
+                [str(image) for image in images], #type: ignore
+                layout_fun=layout,
+            )
+        )
+
+def main() -> None:
+    parser = argparse.ArgumentParser(
+        description="Convert JPEG/PNG images into a PDF, one image per page."
+    )
+
+    parser.add_argument(
+        "images",
+        nargs="+",
+        type=Path,
+        help="Input JPEG/PNG images in page order",
+    )
+
+    parser.add_argument(
+        "-o",
+        "--output",
+        type=Path,
+        default=Path("output.pdf"),
+        help="Output PDF file (default: output.pdf)",
+    )
+
+    args = parser.parse_args()
+
+    images_to_pdf(args.images, args.output)
+
+    print(f"Created: {args.output}")
+
+
+if __name__ == "__main__":
+    main()