Bilder standardmäßig als JPEG (--image-format), Output/ ignorieren

EPUB Band 1: 12,9 MB -> 5,0 MB, Band 2: 14,3 MB -> 5,3 MB.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/test_e2e.py

@@ -110,7 +110,9 @@ def test_epub(pdfs, tmp_path):
     out = tmp_path / "buch.md"
     run(pdfs["digital"], out, "--epub")
     epub = tmp_path / "buch.epub"
-    assert (tmp_path / "buch_images" / "cover.png").is_file()
+    images = tmp_path / "buch_images"
+    assert (images / "cover.jpg").is_file()
+    assert {f.suffix for f in images.iterdir()} == {".jpg"}
     with zipfile.ZipFile(epub) as z:
         assert z.read("mimetype") == b"application/epub+zip"
         nav = z.read("EPUB/nav.xhtml").decode()
@@ -119,3 +121,10 @@ def test_epub(pdfs, tmp_path):
         assert title in nav
     assert "Erika Muster" in opf
     assert "cover" in opf
+
+
+def test_png_on_request(pdfs, tmp_path):
+    out = tmp_path / "png.md"
+    run(pdfs["digital"], out, "--images", "--image-format", "png")
+    md = out.read_text(encoding="utf-8")
+    assert re.search(r"!\[\]\(png_images/[^)]+\.png\)", md)