Derive some avif test images from existing Pillow test images

Replace chimera-missing-pixi.avif and rgba10.heif with images derived from the pillow "hopper" test image.
python-pillow · hugovk · Apr 1, 2025 · Jan 3, 2021 · Oct 16, 2024 · Oct 16, 2024
commit fb096e15cc374c2d59b2e0d0e2f6fb64eaf0c3ec
diff --git a/Tests/images/avif/chimera-missing-pixi.avif b/Tests/images/avif/chimera-missing-pixi.avif
diff --git a/Tests/images/avif/hopper-missing-pixi.avif b/Tests/images/avif/hopper-missing-pixi.avif
diff --git a/Tests/images/avif/hopper.heif b/Tests/images/avif/hopper.heif
diff --git a/Tests/images/avif/rgba10.heif b/Tests/images/avif/rgba10.heif
diff --git a/Tests/test_file_avif.py b/Tests/test_file_avif.py
@@ -33,7 +33,7 @@
 try:
    from PIL import _avif

    HAVE_AVIF = True
 except ImportError:
    HAVE_AVIF = False

@@ -42,13 +42,13 @@


 def assert_xmp_orientation(xmp: bytes, expected: int) -> None:
    assert int(xmp.split(b'tiff:Orientation="')[1].split(b'"')[0]) == expected


 def roundtrip(im: ImageFile.ImageFile, **options: Any) -> ImageFile.ImageFile:
    out = BytesIO()
    im.save(out, "AVIF", **options)
    return Image.open(out)


 def skip_unless_avif_decoder(codec_name: str) -> pytest.MarkDecorator:
@@ -92,22 +92,22 @@
 @skip_unless_feature("avif")
 class TestFileAvif:
    def test_version(self) -> None:
        version = features.version_module("avif")
        assert version is not None
        assert re.search(r"^\d+\.\d+\.\d+$", version)

    def test_codec_version(self) -> None:
        assert AvifImagePlugin.get_codec_version("unknown") is None

        for codec_name in ("aom", "dav1d", "rav1e", "svt"):
            codec_version = AvifImagePlugin.get_codec_version(codec_name)
            if _avif.decoder_codec_available(
                codec_name
            ) or _avif.encoder_codec_available(codec_name):
                assert codec_version is not None
                assert re.search(r"^v?\d+\.\d+\.\d+(-([a-z\d])+)*$", codec_version)
            else:
                assert codec_version is None

    def test_read(self) -> None:
        """
@@ -115,16 +115,16 @@
        Does it have the bits we expect?
        """

        with Image.open(TEST_AVIF_FILE) as image:
            assert image.mode == "RGB"
            assert image.size == (128, 128)
            assert image.format == "AVIF"
            assert image.get_format_mimetype() == "image/avif"
            image.getdata()

            # generated with:
            # avifdec hopper.avif hopper_avif_write.png
            assert_image_similar_tofile(
                image, "Tests/images/avif/hopper_avif_write.png", 11.5
            )

@@ -134,18 +134,18 @@
        Does it have the bits we expect?
        """

        temp_file = tmp_path / "temp.avif"

        im = hopper()
        im.save(temp_file)
        with Image.open(temp_file) as reloaded:
            assert reloaded.mode == "RGB"
            assert reloaded.size == (128, 128)
            assert reloaded.format == "AVIF"
            reloaded.getdata()

            # avifdec hopper.avif avif/hopper_avif_write.png
            assert_image_similar_tofile(
                reloaded, "Tests/images/avif/hopper_avif_write.png", 6.02
            )

@@ -153,160 +153,160 @@
            # difference between the two images is less than the epsilon value,
            # then we're going to accept that it's a reasonable lossy version of
            # the image.
            assert_image_similar(reloaded, im, 8.62)

    def test_AvifEncoder_with_invalid_args(self) -> None:
        """
        Calling encoder functions with no arguments should result in an error.
        """
        with pytest.raises(TypeError):
            _avif.AvifEncoder()

    def test_AvifDecoder_with_invalid_args(self) -> None:
        """
        Calling decoder functions with no arguments should result in an error.
        """
        with pytest.raises(TypeError):
            _avif.AvifDecoder()

    def test_invalid_dimensions(self, tmp_path: Path) -> None:
        test_file = tmp_path / "temp.avif"
        im = Image.new("RGB", (0, 0))
        with pytest.raises(ValueError):
            im.save(test_file)

    def test_encoder_finish_none_error(
        self, monkeypatch: pytest.MonkeyPatch, tmp_path: Path
    ) -> None:
        """Save should raise an OSError if AvifEncoder.finish returns None"""

        class _mock_avif:
            class AvifEncoder:
                def __init__(self, *args: Any) -> None:
                    pass

                def add(self, *args: Any) -> None:
                    pass

                def finish(self) -> None:
                    return None

        monkeypatch.setattr(AvifImagePlugin, "_avif", _mock_avif)

        im = Image.new("RGB", (150, 150))
        test_file = tmp_path / "temp.avif"
        with pytest.raises(OSError):
            im.save(test_file)

    def test_no_resource_warning(self, tmp_path: Path) -> None:
        with Image.open(TEST_AVIF_FILE) as im:
            with warnings.catch_warnings():
                warnings.simplefilter("error")

                im.save(tmp_path / "temp.avif")

    @pytest.mark.parametrize("major_brand", [b"avif", b"avis", b"mif1", b"msf1"])
    def test_accept_ftyp_brands(self, major_brand: bytes) -> None:
        data = b"\x00\x00\x00\x1cftyp%s\x00\x00\x00\x00" % major_brand
        assert AvifImagePlugin._accept(data) is True

    def test_file_pointer_could_be_reused(self) -> None:
        with open(TEST_AVIF_FILE, "rb") as blob:
            with Image.open(blob) as im:
                im.load()
            with Image.open(blob) as im:
                im.load()

    def test_background_from_gif(self, tmp_path: Path) -> None:
        with Image.open("Tests/images/chi.gif") as im:
            original_value = im.convert("RGB").getpixel((1, 1))

            # Save as AVIF
            out_avif = tmp_path / "temp.avif"
            im.save(out_avif, save_all=True)

        # Save as GIF
        out_gif = tmp_path / "temp.gif"
        with Image.open(out_avif) as im:
            im.save(out_gif)

        with Image.open(out_gif) as reread:
            reread_value = reread.convert("RGB").getpixel((1, 1))
        difference = sum([abs(original_value[i] - reread_value[i]) for i in range(3)])
        assert difference <= 3

    def test_save_single_frame(self, tmp_path: Path) -> None:
        temp_file = tmp_path / "temp.avif"
        with Image.open("Tests/images/chi.gif") as im:
            im.save(temp_file)
        with Image.open(temp_file) as im:
            assert im.n_frames == 1

    def test_invalid_file(self) -> None:
        invalid_file = "Tests/images/flower.jpg"

        with pytest.raises(SyntaxError):
            AvifImagePlugin.AvifImageFile(invalid_file)

    def test_load_transparent_rgb(self) -> None:
        test_file = "Tests/images/avif/transparency.avif"
        with Image.open(test_file) as im:
            assert_image(im, "RGBA", (64, 64))

            # image has 876 transparent pixels
            assert im.getchannel("A").getcolors()[0] == (876, 0)

    def test_save_transparent(self, tmp_path: Path) -> None:
        im = Image.new("RGBA", (10, 10), (0, 0, 0, 0))
        assert im.getcolors() == [(100, (0, 0, 0, 0))]

        test_file = tmp_path / "temp.avif"
        im.save(test_file)

        # check if saved image contains the same transparency
        with Image.open(test_file) as im:
            assert_image(im, "RGBA", (10, 10))
            assert im.getcolors() == [(100, (0, 0, 0, 0))]

    def test_save_icc_profile(self) -> None:
        with Image.open("Tests/images/avif/icc_profile_none.avif") as im:
            assert "icc_profile" not in im.info

            with Image.open("Tests/images/avif/icc_profile.avif") as with_icc:
                expected_icc = with_icc.info["icc_profile"]
                assert expected_icc is not None

                im = roundtrip(im, icc_profile=expected_icc)
                assert im.info["icc_profile"] == expected_icc

    def test_discard_icc_profile(self) -> None:
        with Image.open("Tests/images/avif/icc_profile.avif") as im:
            im = roundtrip(im, icc_profile=None)
        assert "icc_profile" not in im.info

    def test_roundtrip_icc_profile(self) -> None:
        with Image.open("Tests/images/avif/icc_profile.avif") as im:
            expected_icc = im.info["icc_profile"]

            im = roundtrip(im)
        assert im.info["icc_profile"] == expected_icc

    def test_roundtrip_no_icc_profile(self) -> None:
        with Image.open("Tests/images/avif/icc_profile_none.avif") as im:
            assert "icc_profile" not in im.info

            im = roundtrip(im)
        assert "icc_profile" not in im.info

    def test_exif(self) -> None:
        # With an EXIF chunk
        with Image.open("Tests/images/avif/exif.avif") as im:
            exif = im.getexif()
        assert exif[274] == 1

        with Image.open("Tests/images/avif/xmp_tags_orientation.avif") as im:
            exif = im.getexif()
        assert exif[274] == 3

    @pytest.mark.parametrize("use_bytes", [True, False])
    @pytest.mark.parametrize("orientation", [1, 2])
@@ -316,35 +316,35 @@
        use_bytes: bool,
        orientation: int,
    ) -> None:
        exif = Image.Exif()
        exif[274] = orientation
        exif_data = exif.tobytes()
        with Image.open(TEST_AVIF_FILE) as im:
            test_file = tmp_path / "temp.avif"
            im.save(test_file, exif=exif_data if use_bytes else exif)

        with Image.open(test_file) as reloaded:
            if orientation == 1:
                assert "exif" not in reloaded.info
            else:
                assert reloaded.info["exif"] == exif_data

    def test_exif_without_orientation(self, tmp_path: Path) -> None:
        exif = Image.Exif()
        exif[272] = b"test"
        exif_data = exif.tobytes()
        with Image.open(TEST_AVIF_FILE) as im:
            test_file = tmp_path / "temp.avif"
            im.save(test_file, exif=exif)

        with Image.open(test_file) as reloaded:
            assert reloaded.info["exif"] == exif_data

    def test_exif_invalid(self, tmp_path: Path) -> None:
        with Image.open(TEST_AVIF_FILE) as im:
            test_file = tmp_path / "temp.avif"
            with pytest.raises(SyntaxError):
                im.save(test_file, exif=b"invalid")

    @pytest.mark.parametrize(
        "rot, mir, exif_orientation",
@@ -362,22 +362,22 @@
    def test_rot_mir_exif(
        self, rot: int, mir: int, exif_orientation: int, tmp_path: Path
    ) -> None:
        with Image.open(f"Tests/images/avif/rot{rot}mir{mir}.avif") as im:
            exif = im.getexif()
            assert exif[274] == exif_orientation

            test_file = tmp_path / "temp.avif"
            im.save(test_file, exif=exif)
        with Image.open(test_file) as reloaded:
            assert reloaded.getexif()[274] == exif_orientation

    def test_xmp(self) -> None:
        with Image.open("Tests/images/avif/xmp_tags_orientation.avif") as im:
            xmp = im.info["xmp"]
        assert_xmp_orientation(xmp, 3)

    def test_xmp_save(self, tmp_path: Path) -> None:
        xmp_arg = "\n".join(
            [
                '<?xpacket begin="" id="W5M0MpCehiHzreSzNTczkc9d"?>',
                '<x:xmpmeta xmlns:x="adobe:ns:meta/">',
@@ -390,67 +390,67 @@
                '<?xpacket end="r"?>',
            ]
        )
        with Image.open(TEST_AVIF_FILE) as im:
            test_file = tmp_path / "temp.avif"
            im.save(test_file, xmp=xmp_arg)

        with Image.open(test_file) as reloaded:
            xmp = reloaded.info["xmp"]
        assert_xmp_orientation(xmp, 1)

    def test_tell(self) -> None:
        with Image.open(TEST_AVIF_FILE) as im:
            assert im.tell() == 0

    def test_seek(self) -> None:
        with Image.open(TEST_AVIF_FILE) as im:
            im.seek(0)

            with pytest.raises(EOFError):
                im.seek(1)

    @pytest.mark.parametrize("subsampling", ["4:4:4", "4:2:2", "4:2:0", "4:0:0"])
    def test_encoder_subsampling(self, tmp_path: Path, subsampling: str) -> None:
        with Image.open(TEST_AVIF_FILE) as im:
            test_file = tmp_path / "temp.avif"
            im.save(test_file, subsampling=subsampling)

    def test_encoder_subsampling_invalid(self, tmp_path: Path) -> None:
        with Image.open(TEST_AVIF_FILE) as im:
            test_file = tmp_path / "temp.avif"
            with pytest.raises(ValueError):
                im.save(test_file, subsampling="foo")

    @pytest.mark.parametrize("value", ["full", "limited"])
    def test_encoder_range(self, tmp_path: Path, value: str) -> None:
        with Image.open(TEST_AVIF_FILE) as im:
            test_file = tmp_path / "temp.avif"
            im.save(test_file, range=value)

    def test_encoder_range_invalid(self, tmp_path: Path) -> None:
        with Image.open(TEST_AVIF_FILE) as im:
            test_file = tmp_path / "temp.avif"
            with pytest.raises(ValueError):
                im.save(test_file, range="foo")

    @skip_unless_avif_encoder("aom")
    def test_encoder_codec_param(self, tmp_path: Path) -> None:
        with Image.open(TEST_AVIF_FILE) as im:
            test_file = tmp_path / "temp.avif"
            im.save(test_file, codec="aom")

    def test_encoder_codec_invalid(self, tmp_path: Path) -> None:
        with Image.open(TEST_AVIF_FILE) as im:
            test_file = tmp_path / "temp.avif"
            with pytest.raises(ValueError):
                im.save(test_file, codec="foo")

    @skip_unless_avif_decoder("dav1d")
    def test_decoder_codec_cannot_encode(self, tmp_path: Path) -> None:
        with Image.open(TEST_AVIF_FILE) as im:
            test_file = tmp_path / "temp.avif"
            with pytest.raises(ValueError):
                im.save(test_file, codec="dav1d")

    @skip_unless_avif_encoder("aom")
    @pytest.mark.parametrize(
@@ -467,126 +467,126 @@
    def test_encoder_advanced_codec_options(
        self, advanced: dict[str, str] | Sequence[tuple[str, str]]
    ) -> None:
        with Image.open(TEST_AVIF_FILE) as im:
            ctrl_buf = BytesIO()
            im.save(ctrl_buf, "AVIF", codec="aom")
            test_buf = BytesIO()
            im.save(
                test_buf,
                "AVIF",
                codec="aom",
                advanced=advanced,
            )
            assert ctrl_buf.getvalue() != test_buf.getvalue()

    @skip_unless_avif_encoder("aom")
    @pytest.mark.parametrize("advanced", [{"foo": "bar"}, {"foo": 1234}, 1234])
    def test_encoder_advanced_codec_options_invalid(
        self, tmp_path: Path, advanced: dict[str, str] | int
    ) -> None:
        with Image.open(TEST_AVIF_FILE) as im:
            test_file = tmp_path / "temp.avif"
            with pytest.raises(ValueError):
                im.save(test_file, codec="aom", advanced=advanced)

    @skip_unless_avif_decoder("aom")
    def test_decoder_codec_param(self, monkeypatch: pytest.MonkeyPatch) -> None:
        monkeypatch.setattr(AvifImagePlugin, "DECODE_CODEC_CHOICE", "aom")

        with Image.open(TEST_AVIF_FILE) as im:
            assert im.size == (128, 128)

    @skip_unless_avif_encoder("rav1e")
    def test_encoder_codec_cannot_decode(
        self, monkeypatch: pytest.MonkeyPatch, tmp_path: Path
    ) -> None:
        monkeypatch.setattr(AvifImagePlugin, "DECODE_CODEC_CHOICE", "rav1e")

        with pytest.raises(ValueError):
            with Image.open(TEST_AVIF_FILE):
                pass

    def test_decoder_codec_invalid(self, monkeypatch: pytest.MonkeyPatch) -> None:
        monkeypatch.setattr(AvifImagePlugin, "DECODE_CODEC_CHOICE", "foo")

        with pytest.raises(ValueError):
            with Image.open(TEST_AVIF_FILE):
                pass

    @skip_unless_avif_encoder("aom")
    def test_encoder_codec_available(self) -> None:
        assert _avif.encoder_codec_available("aom") is True

    def test_encoder_codec_available_bad_params(self) -> None:
        with pytest.raises(TypeError):
            _avif.encoder_codec_available()

    @skip_unless_avif_decoder("dav1d")
    def test_encoder_codec_available_cannot_decode(self) -> None:
        assert _avif.encoder_codec_available("dav1d") is False

    def test_encoder_codec_available_invalid(self) -> None:
        assert _avif.encoder_codec_available("foo") is False

    def test_encoder_quality_valueerror(self, tmp_path: Path) -> None:
        with Image.open(TEST_AVIF_FILE) as im:
            test_file = tmp_path / "temp.avif"
            with pytest.raises(ValueError):
                im.save(test_file, quality="invalid")

    @skip_unless_avif_decoder("aom")
    def test_decoder_codec_available(self) -> None:
        assert _avif.decoder_codec_available("aom") is True

    def test_decoder_codec_available_bad_params(self) -> None:
        with pytest.raises(TypeError):
            _avif.decoder_codec_available()

    @skip_unless_avif_encoder("rav1e")
    def test_decoder_codec_available_cannot_decode(self) -> None:
        assert _avif.decoder_codec_available("rav1e") is False

    def test_decoder_codec_available_invalid(self) -> None:
        assert _avif.decoder_codec_available("foo") is False

    def test_p_mode_transparency(self, tmp_path: Path) -> None:
        im = Image.new("P", size=(64, 64))
        draw = ImageDraw.Draw(im)
        draw.rectangle(xy=[(0, 0), (32, 32)], fill=255)
        draw.rectangle(xy=[(32, 32), (64, 64)], fill=255)

        out_png = tmp_path / "temp.png"
        im.save(out_png, transparency=0)
        with Image.open(out_png) as im_png:
            out_avif = tmp_path / "temp.avif"
            im_png.save(out_avif, quality=100)

            with Image.open(out_avif) as expected:
                assert_image_similar(im_png.convert("RGBA"), expected, 0.17)
 
     def test_decoder_strict_flags(self) -> None:
         # This would fail if full avif strictFlags were enabled
-        with Image.open("Tests/images/avif/chimera-missing-pixi.avif") as im:
+        with Image.open("Tests/images/avif/hopper-missing-pixi.avif") as im:
             assert im.size == (480, 270)
 // Turn off libavif's 'clap' (clean aperture) property validation. 
 self->decoder->strictFlags &= ~AVIF_STRICT_CLAP_VALID; 
 // Allow the PixelInformationProperty ('pixi') to be missing in AV1 image 
 // items. libheif v1.11.0 and older does not add the 'pixi' item property to 
 // AV1 image items. 
 self->decoder->strictFlags &= ~AVIF_STRICT_PIXI_REQUIRED; 
 // Turn off libavif's 'clap' (clean aperture) property validation. 
 self->decoder->strictFlags &= ~AVIF_STRICT_CLAP_VALID; 
 // Allow the PixelInformationProperty ('pixi') to be missing in AV1 image 
 // items. libheif v1.11.0 and older does not add the 'pixi' item property to 
 // AV1 image items. 
 self->decoder->strictFlags &= ~AVIF_STRICT_PIXI_REQUIRED; 
 
     @skip_unless_avif_encoder("aom")
    @pytest.mark.parametrize("speed", [-1, 1, 11])
    def test_aom_optimizations(self, tmp_path: Path, speed: int) -> None:
        test_file = tmp_path / "temp.avif"
        hopper().save(test_file, codec="aom", speed=speed)

    @skip_unless_avif_encoder("svt")
    def test_svt_optimizations(self, tmp_path: Path) -> None:
        test_file = tmp_path / "temp.avif"
        hopper().save(test_file, codec="svt", speed=1)


 @skip_unless_feature("avif")
 class TestAvifAnimation:
    @contextmanager
    def star_frames(self) -> Generator[list[Image.Image], None, None]:
        with Image.open("Tests/images/avif/star.png") as f:
            yield [f, f.rotate(90), f.rotate(180), f.rotate(270)]

    def test_n_frames(self) -> None:
        """
@@ -594,13 +594,13 @@
        correctly.
        """

        with Image.open(TEST_AVIF_FILE) as im:
            assert im.n_frames == 1
            assert not im.is_animated

        with Image.open("Tests/images/avif/star.avifs") as im:
            assert im.n_frames == 5
            assert im.is_animated

    def test_write_animation_P(self, tmp_path: Path) -> None:
        """
@@ -608,22 +608,22 @@
        count, and ensure the frames are visually similar to the originals.
        """

        with Image.open("Tests/images/avif/star.gif") as original:
            assert original.n_frames > 1

            temp_file = tmp_path / "temp.avif"
            original.save(temp_file, save_all=True)
            with Image.open(temp_file) as im:
                assert im.n_frames == original.n_frames

                # Compare first frame in P mode to frame from original GIF
                assert_image_similar(im, original.convert("RGBA"), 2)

                # Compare later frames in RGBA mode to frames from original GIF
                for frame in range(1, original.n_frames):
                    original.seek(frame)
                    im.seek(frame)
                    assert_image_similar(im, original, 2.54)

    def test_write_animation_RGBA(self, tmp_path: Path) -> None:
        """
@@ -631,62 +631,62 @@
        are visually similar to the originals.
        """

        def check(temp_file: Path) -> None:
            with Image.open(temp_file) as im:
                assert im.n_frames == 4

                # Compare first frame to original
                assert_image_similar(im, frame1, 2.7)

                # Compare second frame to original
                im.seek(1)
                assert_image_similar(im, frame2, 4.1)

        with self.star_frames() as frames:
            frame1 = frames[0]
            frame2 = frames[1]
            temp_file1 = tmp_path / "temp.avif"
            frames[0].copy().save(temp_file1, save_all=True, append_images=frames[1:])
            check(temp_file1)

            # Test appending using a generator
            def imGenerator(
                ims: list[Image.Image],
            ) -> Generator[Image.Image, None, None]:
                yield from ims

            temp_file2 = tmp_path / "temp_generator.avif"
            frames[0].copy().save(
                temp_file2,
                save_all=True,
                append_images=imGenerator(frames[1:]),
            )
            check(temp_file2)

    def test_sequence_dimension_mismatch_check(self, tmp_path: Path) -> None:
        temp_file = tmp_path / "temp.avif"
        frame1 = Image.new("RGB", (100, 100))
        frame2 = Image.new("RGB", (150, 150))
        with pytest.raises(ValueError):
            frame1.save(temp_file, save_all=True, append_images=[frame2])
 
     def test_heif_raises_unidentified_image_error(self) -> None:
         with pytest.raises(UnidentifiedImageError):
-            with Image.open("Tests/images/avif/rgba10.heif"):
+            with Image.open("Tests/images/avif/hopper.heif"):
                 pass
 if major_brand in container_brands: 
     # We accept files with AVIF container brands; we can't yet know if 
     # the ftyp box has the correct compatible brands, but if it doesn't 
     # then the plugin will raise a SyntaxError which Pillow will catch 
     # before moving on to the next plugin that accepts the file. 
     # 
     # Also, because this file might not actually be an AVIF file, we 
     # don't raise an error if AVIF support isn't properly compiled. 
     return True 
 if major_brand in container_brands: 
     # We accept files with AVIF container brands; we can't yet know if 
     # the ftyp box has the correct compatible brands, but if it doesn't 
     # then the plugin will raise a SyntaxError which Pillow will catch 
     # before moving on to the next plugin that accepts the file. 
     # 
     # Also, because this file might not actually be an AVIF file, we 
     # don't raise an error if AVIF support isn't properly compiled. 
     return True 
 
     @pytest.mark.parametrize("alpha_premultiplied", [False, True])
    def test_alpha_premultiplied(
        self, tmp_path: Path, alpha_premultiplied: bool
    ) -> None:
        temp_file = tmp_path / "temp.avif"
        color = (200, 200, 200, 1)
        im = Image.new("RGBA", (1, 1), color)
        im.save(temp_file, alpha_premultiplied=alpha_premultiplied)

        expected = (255, 255, 255, 1) if alpha_premultiplied else color
        with Image.open(temp_file) as reloaded:
            assert reloaded.getpixel((0, 0)) == expected

    def test_timestamp_and_duration(self, tmp_path: Path) -> None:
        """
@@ -694,28 +694,28 @@
        timestamps and durations are correct.
        """

        durations = [1, 10, 20, 30, 40]
        temp_file = tmp_path / "temp.avif"
        with self.star_frames() as frames:
            frames[0].save(
                temp_file,
                save_all=True,
                append_images=(frames[1:] + [frames[0]]),
                duration=durations,
            )

        with Image.open(temp_file) as im:
            assert im.n_frames == 5
            assert im.is_animated

            # Check that timestamps and durations match original values specified
            timestamp = 0
            for frame in range(im.n_frames):
                im.seek(frame)
                im.load()
                assert im.info["duration"] == durations[frame]
                assert im.info["timestamp"] == timestamp
                timestamp += durations[frame]

    def test_seeking(self, tmp_path: Path) -> None:
        """
@@ -723,36 +723,36 @@
        reverse-order, verifying the timestamps and durations are correct.
        """

        duration = 33
        temp_file = tmp_path / "temp.avif"
        with self.star_frames() as frames:
            frames[0].save(
                temp_file,
                save_all=True,
                append_images=(frames[1:] + [frames[0]]),
                duration=duration,
            )

        with Image.open(temp_file) as im:
            assert im.n_frames == 5
            assert im.is_animated

            # Traverse frames in reverse, checking timestamps and durations
            timestamp = duration * (im.n_frames - 1)
            for frame in reversed(range(im.n_frames)):
                im.seek(frame)
                im.load()
                assert im.info["duration"] == duration
                assert im.info["timestamp"] == timestamp
                timestamp -= duration

    def test_seek_errors(self) -> None:
        with Image.open("Tests/images/avif/star.avifs") as im:
            with pytest.raises(EOFError):
                im.seek(-1)

            with pytest.raises(EOFError):
                im.seek(42)


 MAX_THREADS = os.cpu_count() or 1
@@ -767,12 +767,12 @@
        is_docker_qemu(), reason="Skipping on cross-architecture containers"
    )
    def test_leak_load(self) -> None:
        with open(TEST_AVIF_FILE, "rb") as f:
            im_data = f.read()

        def core() -> None:
            with Image.open(BytesIO(im_data)) as im:
                im.load()
            gc.collect()

        self._test_leak(core)