Fix stop_frame

cvat/apps/engine/serializers.py

@@ -673,7 +673,7 @@ def create(self, validated_data):
 
             segment = models.Segment.objects.create(
                 start_frame=0,
-                stop_frame=task.data.size,
+                stop_frame=task.data.size - 1,
                 frames=frames,
                 task=task,
                 type=models.SegmentType.SPECIFIC_FRAMES,

tests/python/rest_api/test_jobs.py

@@ -573,6 +573,10 @@ def test_can_get_gt_job_meta(self, admin_user, tasks, task_mode):
         with make_api_client(user) as api_client:
             (gt_job_meta, _) = api_client.jobs_api.retrieve_data_meta(gt_job.id)
 
+        # These values are relative to the resulting task frames, unlike meta values
+        assert 0 == gt_job.start_frame
+        assert task_meta.size - 1 == gt_job.stop_frame
+
         # The size is adjusted by the frame step and included frames
         assert job_frame_count == gt_job_meta.size
         assert job_frame_ids == gt_job_meta.included_frames
@@ -623,6 +627,10 @@ def test_can_get_gt_job_meta_with_complex_frame_setup(self, admin_user):
         with make_api_client(admin_user) as api_client:
             (gt_job_meta, _) = api_client.jobs_api.retrieve_data_meta(gt_job.id)
 
+        # These values are relative to the resulting task frames, unlike meta values
+        assert 0 == gt_job.start_frame
+        assert len(task_frame_ids) - 1 == gt_job.stop_frame
+
         # The size is adjusted by the frame step and included frames
         assert len(job_frame_ids) == gt_job_meta.size
         assert job_frame_ids == gt_job_meta.included_frames