Fix cuboid conversion (#1577)

* Fix cuboid conversion

* update changelog

Co-authored-by: Nikita Manovich <40690625+nmanovic@users.noreply.github.com>

CHANGELOG.md

@@ -46,6 +46,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fixed an issue with large number of instances in instance mask (https://github.com/opencv/cvat/issues/1539)
 - Fixed full COCO dataset import error with conflicting labels in keypoints and detection (https://github.com/opencv/cvat/pull/1548)
 - Fixed COCO keypoints skeleton parsing and saving (https://github.com/opencv/cvat/issues/1539)
+- Fixed an error when exporting a task with cuboids to any format except CVAT (https://github.com/opencv/cvat/pull/1577)
 - `tf.placeholder() is not compatible with eager execution` exception for auto_segmentation (https://github.com/opencv/cvat/pull/1562)
 - Fixed a problem with mask to polygons conversion when polygons are too small (https://github.com/opencv/cvat/pull/1581)
 

cvat/apps/dataset_manager/bindings.py

@@ -518,6 +518,8 @@ class CvatTaskDataExtractor(datumaro.SourceExtractor):
                 x0, y0, x1, y1 = anno_points
                 anno = datumaro.Bbox(x0, y0, x1 - x0, y1 - y0,
                     label=anno_label, attributes=anno_attr, group=anno_group)
+            elif shape_obj.type == ShapeType.CUBOID:
+                continue # Datumaro does not support cuboids
             else:
                 raise Exception("Unknown shape type '%s'" % shape_obj.type)