diff --git a/datumaro/datumaro/plugins/transforms.py b/datumaro/datumaro/plugins/transforms.py
index 7449d4fdeb14..6c418387b767 100644
--- a/datumaro/datumaro/plugins/transforms.py
+++ b/datumaro/datumaro/plugins/transforms.py
@@ -9,7 +9,7 @@
 import pycocotools.mask as mask_utils
 
 from datumaro.components.extractor import (Transform, AnnotationType,
-    Mask, RleMask, Polygon)
+    Mask, RleMask, Polygon, Bbox)
 from datumaro.components.cli_plugin import CliPlugin
 import datumaro.util.mask_tools as mask_tools
 
@@ -237,6 +237,25 @@ def convert_mask(mask):
             for p in polygons
         ]
 
+class ShapesToBoxes(Transform, CliPlugin):
+    def transform_item(self, item):
+        annotations = []
+        for ann in item.annotations:
+            if ann.type in { AnnotationType.mask, AnnotationType.polygon,
+                AnnotationType.polyline, AnnotationType.points,
+            }:
+                annotations.append(self.convert_shape(ann))
+            else:
+                annotations.append(ann)
+
+        return self.wrap_item(item, annotations=annotations)
+
+    @staticmethod
+    def convert_shape(shape):
+        bbox = shape.get_bbox()
+        return Bbox(*bbox, label=shape.label, z_order=shape.z_order,
+            id=shape.id, attributes=shape.attributes, group=shape.group)
+
 class Reindex(Transform, CliPlugin):
     @classmethod
     def build_cmdline_parser(cls, **kwargs):
@@ -253,3 +272,34 @@ def __init__(self, extractor, start=1):
     def __iter__(self):
         for i, item in enumerate(self._extractor):
             yield self.wrap_item(item, id=i + self._start)
+
+
+class MapSubsets(Transform, CliPlugin):
+    @staticmethod
+    def _mapping_arg(s):
+        parts = s.split(':')
+        if len(parts) != 2:
+            import argparse
+            raise argparse.ArgumentTypeError()
+        return parts
+
+    @classmethod
+    def build_cmdline_parser(cls, **kwargs):
+        parser = super().build_cmdline_parser(**kwargs)
+        parser.add_argument('-s', '--subset', action='append',
+            type=cls._mapping_arg, dest='mapping',
+            help="Subset mapping of the form: 'src:dst' (repeatable)")
+        return parser
+
+    def __init__(self, extractor, mapping=None):
+        super().__init__(extractor)
+
+        if mapping is None:
+            mapping = {}
+        elif not isinstance(mapping, dict):
+            mapping = dict(tuple(m) for m in mapping)
+        self._mapping = mapping
+
+    def transform_item(self, item):
+        return self.wrap_item(item,
+            subset=self._mapping.get(item.subset, item.subset))
\ No newline at end of file
diff --git a/datumaro/tests/test_transforms.py b/datumaro/tests/test_transforms.py
index e5f0600af3d4..41daf1734938 100644
--- a/datumaro/tests/test_transforms.py
+++ b/datumaro/tests/test_transforms.py
@@ -3,7 +3,7 @@
 from unittest import TestCase
 
 from datumaro.components.extractor import (Extractor, DatasetItem,
-    Mask, Polygon
+    Mask, Polygon, PolyLine, Points, Bbox
 )
 from datumaro.util.test_utils import compare_datasets
 import datumaro.plugins.transforms as transforms
@@ -185,4 +185,62 @@ def __iter__(self):
 
         actual = transforms.MergeInstanceSegments(SrcExtractor(),
             include_polygons=True)
-        compare_datasets(self, DstExtractor(), actual)
\ No newline at end of file
+        compare_datasets(self, DstExtractor(), actual)
+
+    def test_map_subsets(self):
+        class SrcExtractor(Extractor):
+            def __iter__(self):
+                return iter([
+                    DatasetItem(id=1, subset='a'),
+                    DatasetItem(id=2, subset='b'),
+                    DatasetItem(id=3, subset='c'),
+                ])
+
+        class DstExtractor(Extractor):
+            def __iter__(self):
+                return iter([
+                    DatasetItem(id=1, subset=''),
+                    DatasetItem(id=2, subset='a'),
+                    DatasetItem(id=3, subset='c'),
+                ])
+
+        actual = transforms.MapSubsets(SrcExtractor(),
+            { 'a': '', 'b': 'a' })
+        compare_datasets(self, DstExtractor(), actual)
+
+    def test_shapes_to_boxes(self):
+        class SrcExtractor(Extractor):
+            def __iter__(self):
+                return iter([
+                    DatasetItem(id=1, image=np.zeros((5, 5, 3)),
+                        annotations=[
+                            Mask(np.array([
+                                    [0, 0, 1, 1, 1],
+                                    [0, 0, 0, 0, 1],
+                                    [1, 0, 0, 0, 1],
+                                    [1, 0, 0, 0, 0],
+                                    [1, 1, 1, 0, 0]],
+                                ), id=1),
+                            Polygon([1, 1, 4, 1, 4, 4, 1, 4], id=2),
+                            PolyLine([1, 1, 2, 1, 2, 2, 1, 2], id=3),
+                            Points([2, 2, 4, 2, 4, 4, 2, 4], id=4),
+                        ]
+                    ),
+                ])
+
+        class DstExtractor(Extractor):
+            def __iter__(self):
+                return iter([
+                    DatasetItem(id=1, image=np.zeros((5, 5, 3)),
+                        annotations=[
+                            Bbox(0, 0, 4, 4, id=1),
+                            Bbox(1, 1, 3, 3, id=2),
+                            Bbox(1, 1, 1, 1, id=3),
+                            Bbox(2, 2, 2, 2, id=4),
+                        ]
+                    ),
+                ])
+
+        actual = transforms.ShapesToBoxes(SrcExtractor())
+        compare_datasets(self, DstExtractor(), actual)
+