read offset for width/height reading correctly

11 years ago · 25a2178444
parent 2e9ac9ec1e
commit 25a2178444
1 changed files with 2 additions and 1 deletions
--- a/img2pdf.py
+++ b/img2pdf.py
@ -105,7 +105,8 @@ def main(images, dpi, title=None, author=None, creator=None, producer=None,
                exit(1)
            # image is jpeg2000
            imgformat = "JP2"
-            im.seek(48)
+            offset, = struct.unpack(">I", im.read(4))
+            im.seek(28+offset)
            height, width = struct.unpack(">II", im.read(8))
            if colorspace:
                color = colorspace