add information about how to convert images to 8 bit (closes: #170)

2023-08-03 22:30:27 +02:00 · 2023-08-03 22:30:27 +02:00 · 3e832fbcc2
commit 3e832fbcc2
parent 1e8557cef1
1 changed files with 4 additions and 0 deletions
--- a/src/img2pdf.py
+++ b/src/img2pdf.py
@ -1322,6 +1322,10 @@ def get_imgmetadata(
            if depth > 8:
                logger.warning("Image with transparency and a bit depth of %d." % depth)
                logger.warning("This is unsupported due to PIL limitations.")
+                logger.warning(
+                    "If you accept a lossy conversion, you can manually convert "
+                    "your images to 8 bit using `convert -depth 8` from imagemagick"
+                )
                raise AlphaChannelError(
                    "Refusing to work with multiple >8bit channels."
                )