diff --git a/mediapipe/calculators/util/rect_to_render_scale_calculator.cc b/mediapipe/calculators/util/rect_to_render_scale_calculator.cc
index 6ff6b3d5..85ed1db7 100644
--- a/mediapipe/calculators/util/rect_to_render_scale_calculator.cc
+++ b/mediapipe/calculators/util/rect_to_render_scale_calculator.cc
@@ -80,7 +80,9 @@ absl::Status RectToRenderScaleCalculator::GetContract(CalculatorContract* cc) {
   cc->Inputs().Tag(kNormRectTag).Set<NormalizedRect>();
   cc->Inputs().Tag(kImageSizeTag).Set<std::pair<int, int>>();
   cc->Outputs().Tag(kRenderScaleTag).Set<float>();
-
+  cc->SetProcessTimestampBounds(
+      cc->Options<RectToRenderScaleCalculatorOptions>()
+          .process_timestamp_bounds());
   return absl::OkStatus();
 }
 
diff --git a/mediapipe/calculators/util/rect_to_render_scale_calculator.proto b/mediapipe/calculators/util/rect_to_render_scale_calculator.proto
index dda6e2c9..377b1241 100644
--- a/mediapipe/calculators/util/rect_to_render_scale_calculator.proto
+++ b/mediapipe/calculators/util/rect_to_render_scale_calculator.proto
@@ -29,4 +29,8 @@ message RectToRenderScaleCalculatorOptions {
   // when actual object size on the image will be `B`, than all RenderData
   // primitives will be scaled with factor `B/A`.
   optional float multiplier = 1 [default = 0.01];
+
+  // When true, Process is called for every new timestamp bound, with or without
+  // new packets.
+  optional bool process_timestamp_bounds = 2 [default = false];
 }