diff --git a/mediapipe/calculators/core/flow_limiter_calculator_test.cc b/mediapipe/calculators/core/flow_limiter_calculator_test.cc
index 45bace271..5d0594de9 100644
--- a/mediapipe/calculators/core/flow_limiter_calculator_test.cc
+++ b/mediapipe/calculators/core/flow_limiter_calculator_test.cc
@@ -85,75 +85,6 @@ std::string SourceString(Timestamp t) {
              : absl::StrCat("Timestamp(", t.DebugString(), ")");
 }
 
-template <typename T>
-std::string SourceString(Packet packet) {
-  std::ostringstream oss;
-  if (packet.IsEmpty()) {
-    oss << "Packet()";
-  } else {
-    oss << "MakePacket<" << MediaPipeTypeStringOrDemangled<T>() << ">("
-        << packet.Get<T>() << ")";
-  }
-  oss << ".At(" << SourceString(packet.Timestamp()) << ")";
-  return oss.str();
-}
-
-template <typename PacketContainer, typename PacketContent>
-class PacketsEqMatcher
-    : public ::testing::MatcherInterface<const PacketContainer&> {
- public:
-  PacketsEqMatcher(PacketContainer packets) : packets_(packets) {}
-  void DescribeTo(::std::ostream* os) const override {
-    *os << "The expected packet contents: \n";
-    Print(packets_, os);
-  }
-  bool MatchAndExplain(
-      const PacketContainer& value,
-      ::testing::MatchResultListener* listener) const override {
-    if (!Equals(packets_, value)) {
-      if (listener->IsInterested()) {
-        *listener << "The actual packet contents: \n";
-        Print(value, listener->stream());
-      }
-      return false;
-    }
-    return true;
-  }
-
- private:
-  bool Equals(const PacketContainer& c1, const PacketContainer& c2) const {
-    if (c1.size() != c2.size()) {
-      return false;
-    }
-    for (auto i1 = c1.begin(), i2 = c2.begin(); i1 != c1.end(); ++i1, ++i2) {
-      Packet p1 = *i1, p2 = *i2;
-      if (p1.Timestamp() != p2.Timestamp() || p1.IsEmpty() != p2.IsEmpty() ||
-          (!p1.IsEmpty() &&
-           p1.Get<PacketContent>() != p2.Get<PacketContent>())) {
-        return false;
-      }
-    }
-    return true;
-  }
-  void Print(const PacketContainer& packets, ::std::ostream* os) const {
-    for (auto it = packets.begin(); it != packets.end(); ++it) {
-      const Packet& packet = *it;
-      *os << (it == packets.begin() ? "{" : "");
-      *os << SourceString<PacketContent>(packet);
-      *os << (std::next(it) == packets.end() ? "}" : ", ");
-    }
-  }
-
-  const PacketContainer packets_;
-};
-
-template <typename PacketContainer, typename PacketContent>
-::testing::Matcher<const PacketContainer&> PacketsEq(
-    const PacketContainer& packets) {
-  return MakeMatcher(
-      new PacketsEqMatcher<PacketContainer, PacketContent>(packets));
-}
-
 // A Calculator::Process callback function.
 typedef std::function<absl::Status(const InputStreamShardSet&,
                                    OutputStreamShardSet*)>
@@ -743,9 +674,6 @@ TEST_F(FlowLimiterCalculatorTest, TwoInputStreams) {
 // The processing time "sleep_time" is reduced from 22ms to 12ms to create
 // the same frame rate as FlowLimiterCalculatorTest::TwoInputStreams.
 TEST_F(FlowLimiterCalculatorTest, ZeroQueue) {
-  auto BoolPacketsEq = PacketsEq<std::vector<Packet>, bool>;
-  auto IntPacketsEq = PacketsEq<std::vector<Packet>, int>;
-
   // Configure the test.
   SetUpInputData();
   SetUpSimulationClock();
@@ -839,13 +767,16 @@ TEST_F(FlowLimiterCalculatorTest, ZeroQueue) {
       input_packets_[0],  input_packets_[2],  input_packets_[15],
       input_packets_[17], input_packets_[19],
   };
-  EXPECT_THAT(out_1_packets_, IntPacketsEq(expected_output));
+  EXPECT_THAT(out_1_packets_,
+              ElementsAreArray(PacketMatchers<int>(expected_output)));
+
   // Exactly the timestamps released by FlowLimiterCalculator for in_1_sampled.
   std::vector<Packet> expected_output_2 = {
       input_packets_[0],  input_packets_[2],  input_packets_[4],
       input_packets_[15], input_packets_[17], input_packets_[19],
   };
-  EXPECT_THAT(out_2_packets, IntPacketsEq(expected_output_2));
+  EXPECT_THAT(out_2_packets,
+              ElementsAreArray(PacketMatchers<int>(expected_output_2)));
 
   // Validate the ALLOW stream output.
   std::vector<Packet> expected_allow = {
@@ -871,7 +802,8 @@ TEST_F(FlowLimiterCalculatorTest, ZeroQueue) {
       MakePacket<bool>(true).At(Timestamp(190000)),
       MakePacket<bool>(false).At(Timestamp(200000)),
   };
-  EXPECT_THAT(allow_packets_, BoolPacketsEq(expected_allow));
+  EXPECT_THAT(allow_packets_,
+              ElementsAreArray(PacketMatchers<bool>(expected_allow)));
 }
 
 std::vector<Packet> StripBoundsUpdates(const std::vector<Packet>& packets,
@@ -891,9 +823,6 @@ std::vector<Packet> StripBoundsUpdates(const std::vector<Packet>& packets,
 // Shows how FlowLimiterCalculator releases auxiliary input packets.
 // In this test, auxiliary input packets arrive at twice the primary rate.
 TEST_F(FlowLimiterCalculatorTest, AuxiliaryInputs) {
-  auto BoolPacketsEq = PacketsEq<std::vector<Packet>, bool>;
-  auto IntPacketsEq = PacketsEq<std::vector<Packet>, int>;
-
   // Configure the test.
   SetUpInputData();
   SetUpSimulationClock();
@@ -1011,7 +940,8 @@ TEST_F(FlowLimiterCalculatorTest, AuxiliaryInputs) {
       MakePacket<int>(6).At(Timestamp(60000)),
       Packet().At(Timestamp(80000)),
   };
-  EXPECT_THAT(out_1_packets_, IntPacketsEq(expected_output));
+  EXPECT_THAT(out_1_packets_,
+              ElementsAreArray(PacketMatchers<int>(expected_output)));
 
   // Packets following input packets 2 and 6, and not input packets 4 and 8.
   std::vector<Packet> expected_auxiliary_output = {
@@ -1031,12 +961,13 @@ TEST_F(FlowLimiterCalculatorTest, AuxiliaryInputs) {
   };
   std::vector<Packet> actual_2 =
       StripBoundsUpdates(out_2_packets, Timestamp(90000));
-  EXPECT_THAT(actual_2, IntPacketsEq(expected_auxiliary_output));
+  EXPECT_THAT(actual_2,
+              ElementsAreArray(PacketMatchers<int>(expected_auxiliary_output)));
   std::vector<Packet> expected_3 =
       StripBoundsUpdates(expected_auxiliary_output, Timestamp(39999));
   std::vector<Packet> actual_3 =
       StripBoundsUpdates(out_3_packets, Timestamp(39999));
-  EXPECT_THAT(actual_3, IntPacketsEq(expected_3));
+  EXPECT_THAT(actual_3, ElementsAreArray(PacketMatchers<int>(expected_3)));
 
   // Validate the ALLOW stream output.
   std::vector<Packet> expected_allow = {
@@ -1045,7 +976,8 @@ TEST_F(FlowLimiterCalculatorTest, AuxiliaryInputs) {
       MakePacket<bool>(true).At(Timestamp(60000)),
       MakePacket<bool>(false).At(Timestamp(80000)),
   };
-  EXPECT_THAT(allow_packets_, BoolPacketsEq(expected_allow));
+  EXPECT_THAT(allow_packets_,
+              ElementsAreArray(PacketMatchers<bool>(expected_allow)));
 }
 
 }  // anonymous namespace
diff --git a/mediapipe/framework/BUILD b/mediapipe/framework/BUILD
index 19c51853c..8ccdac3b9 100644
--- a/mediapipe/framework/BUILD
+++ b/mediapipe/framework/BUILD
@@ -1469,6 +1469,7 @@ cc_test(
         "//mediapipe/framework/stream_handler:mux_input_stream_handler",
         "//mediapipe/framework/stream_handler:sync_set_input_stream_handler",
         "//mediapipe/framework/tool:sink",
+        "//mediapipe/util:packet_test_util",
         "@com_google_absl//absl/strings",
     ],
 )
diff --git a/mediapipe/framework/calculator_graph.cc b/mediapipe/framework/calculator_graph.cc
index c17a2e1e2..526a74835 100644
--- a/mediapipe/framework/calculator_graph.cc
+++ b/mediapipe/framework/calculator_graph.cc
@@ -98,14 +98,13 @@ void CalculatorGraph::GraphInputStream::SetHeader(const Packet& header) {
   manager_->LockIntroData();
 }
 
+void CalculatorGraph::GraphInputStream::SetNextTimestampBound(
+    Timestamp timestamp) {
+  shard_.SetNextTimestampBound(timestamp);
+}
+
 void CalculatorGraph::GraphInputStream::PropagateUpdatesToMirrors() {
-  // Since GraphInputStream doesn't allow SetOffset() and
-  // SetNextTimestampBound(), the timestamp bound to propagate is only
-  // determined by the timestamp of the output packets.
-  CHECK(!shard_.IsEmpty()) << "Shard with name \"" << manager_->Name()
-                           << "\" failed";
-  manager_->PropagateUpdatesToMirrors(
-      shard_.LastAddedPacketTimestamp().NextAllowedInStream(), &shard_);
+  manager_->PropagateUpdatesToMirrors(shard_.NextTimestampBound(), &shard_);
 }
 
 void CalculatorGraph::GraphInputStream::Close() {
@@ -868,6 +867,19 @@ absl::Status CalculatorGraph::AddPacketToInputStream(
   return AddPacketToInputStreamInternal(stream_name, std::move(packet));
 }
 
+absl::Status CalculatorGraph::SetInputStreamTimestampBound(
+    const std::string& stream_name, Timestamp timestamp) {
+  std::unique_ptr<GraphInputStream>* stream =
+      mediapipe::FindOrNull(graph_input_streams_, stream_name);
+  RET_CHECK(stream).SetNoLogging() << absl::Substitute(
+      "SetInputStreamTimestampBound called on input stream \"$0\" which is not "
+      "a graph input stream.",
+      stream_name);
+  (*stream)->SetNextTimestampBound(timestamp);
+  (*stream)->PropagateUpdatesToMirrors();
+  return absl::OkStatus();
+}
+
 // We avoid having two copies of this code for AddPacketToInputStream(
 // const Packet&) and AddPacketToInputStream(Packet &&) by having this
 // internal-only templated version.  T&& is a forwarding reference here, so
diff --git a/mediapipe/framework/calculator_graph.h b/mediapipe/framework/calculator_graph.h
index c51476102..04f9de45f 100644
--- a/mediapipe/framework/calculator_graph.h
+++ b/mediapipe/framework/calculator_graph.h
@@ -257,6 +257,10 @@ class CalculatorGraph {
   absl::Status AddPacketToInputStream(const std::string& stream_name,
                                       Packet&& packet);
 
+  // Indicates that input will arrive no earlier than a certain timestamp.
+  absl::Status SetInputStreamTimestampBound(const std::string& stream_name,
+                                            Timestamp timestamp);
+
   // Sets the queue size of a graph input stream, overriding the graph default.
   absl::Status SetInputStreamMaxQueueSize(const std::string& stream_name,
                                           int max_queue_size);
@@ -425,6 +429,8 @@ class CalculatorGraph {
 
     void AddPacket(Packet&& packet) { shard_.AddPacket(std::move(packet)); }
 
+    void SetNextTimestampBound(Timestamp timestamp);
+
     void PropagateUpdatesToMirrors();
 
     void Close();
diff --git a/mediapipe/framework/calculator_graph_bounds_test.cc b/mediapipe/framework/calculator_graph_bounds_test.cc
index b55f9459d..d149337cc 100644
--- a/mediapipe/framework/calculator_graph_bounds_test.cc
+++ b/mediapipe/framework/calculator_graph_bounds_test.cc
@@ -12,6 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+#include <vector>
+
 #include "absl/strings/str_replace.h"
 #include "mediapipe/framework/calculator_context.h"
 #include "mediapipe/framework/calculator_framework.h"
@@ -24,6 +26,7 @@
 #include "mediapipe/framework/port/status_matchers.h"
 #include "mediapipe/framework/thread_pool_executor.h"
 #include "mediapipe/framework/timestamp.h"
+#include "mediapipe/util/packet_test_util.h"
 
 namespace mediapipe {
 namespace {
@@ -1536,7 +1539,7 @@ class EmptyPacketCalculator : public CalculatorBase {
 };
 REGISTER_CALCULATOR(EmptyPacketCalculator);
 
-// This test shows that an output timestamp bound can be specified by outputing
+// This test shows that an output timestamp bound can be specified by outputting
 // an empty packet with a settled timestamp.
 TEST(CalculatorGraphBoundsTest, EmptyPacketOutput) {
   // OffsetAndBoundCalculator runs on parallel threads and sends ts
@@ -1580,6 +1583,195 @@ TEST(CalculatorGraphBoundsTest, EmptyPacketOutput) {
     EXPECT_EQ(output_0_packets[i].Timestamp(), Timestamp(10 + i * 10));
   }
 
+  // Shut down the graph.
+  MP_ASSERT_OK(graph.CloseAllPacketSources());
+  MP_ASSERT_OK(graph.WaitUntilDone());
+}
+
+// This test shows that input timestamp bounds can be specified using
+// CalculatorGraph::SetInputStreamTimestampBound.
+TEST(CalculatorGraphBoundsTest, SetInputStreamTimestampBound) {
+  std::string config_str = R"(
+            input_stream: "input_0"
+            node {
+              calculator: "ProcessBoundToPacketCalculator"
+              input_stream: "input_0"
+              output_stream: "output_0"
+            }
+          )";
+  CalculatorGraphConfig config =
+      mediapipe::ParseTextProtoOrDie<CalculatorGraphConfig>(config_str);
+  CalculatorGraph graph;
+  std::vector<Packet> output_0_packets;
+  MP_ASSERT_OK(graph.Initialize(config));
+  MP_ASSERT_OK(graph.ObserveOutputStream("output_0", [&](const Packet& p) {
+    output_0_packets.push_back(p);
+    return absl::OkStatus();
+  }));
+  MP_ASSERT_OK(graph.StartRun({}));
+  MP_ASSERT_OK(graph.WaitUntilIdle());
+
+  // Send in timestamp bounds.
+  for (int i = 0; i < 9; ++i) {
+    const int ts = 10 + i * 10;
+    MP_ASSERT_OK(graph.SetInputStreamTimestampBound(
+        "input_0", Timestamp(ts).NextAllowedInStream()));
+    MP_ASSERT_OK(graph.WaitUntilIdle());
+  }
+
+  // 9 timestamp bounds are converted to packets.
+  EXPECT_EQ(output_0_packets.size(), 9);
+  for (int i = 0; i < 9; ++i) {
+    EXPECT_EQ(output_0_packets[i].Timestamp(), Timestamp(10 + i * 10));
+  }
+
+  // Shutdown the graph.
+  MP_ASSERT_OK(graph.CloseAllPacketSources());
+  MP_ASSERT_OK(graph.WaitUntilDone());
+}
+
+// This test shows how an input stream with infrequent packets, such as
+// configuration protobufs, can be consumed while processing more frequent
+// packets, such as video frames.
+TEST(CalculatorGraphBoundsTest, TimestampBoundsForInfrequentInput) {
+  // PassThroughCalculator consuming two input streams, with default ISH.
+  std::string config_str = R"pb(
+    input_stream: "INFREQUENT:config"
+    input_stream: "FREQUENT:frame"
+    node {
+      calculator: "PassThroughCalculator"
+      input_stream: "CONFIG:config"
+      input_stream: "VIDEO:frame"
+      output_stream: "VIDEO:output_frame"
+      output_stream: "CONFIG:output_config"
+    }
+  )pb";
+
+  CalculatorGraphConfig config =
+      mediapipe::ParseTextProtoOrDie<CalculatorGraphConfig>(config_str);
+  CalculatorGraph graph;
+  std::vector<Packet> frame_packets;
+  MP_ASSERT_OK(graph.Initialize(config));
+  MP_ASSERT_OK(graph.ObserveOutputStream(
+      "output_frame",
+      [&](const Packet& p) {
+        frame_packets.push_back(p);
+        return absl::OkStatus();
+      },
+      /*observe_bound_updates=*/true));
+  std::vector<Packet> config_packets;
+  MP_ASSERT_OK(graph.ObserveOutputStream(
+      "output_config",
+      [&](const Packet& p) {
+        config_packets.push_back(p);
+        return absl::OkStatus();
+      },
+      /*observe_bound_updates=*/true));
+  MP_ASSERT_OK(graph.StartRun({}));
+  MP_ASSERT_OK(graph.WaitUntilIdle());
+
+  // Utility functions to send packets or timestamp bounds.
+  auto send_fn = [&](std::string stream, std::string value, int ts) {
+    MP_ASSERT_OK(graph.AddPacketToInputStream(
+        stream,
+        MakePacket<std::string>(absl::StrCat(value)).At(Timestamp(ts))));
+    MP_ASSERT_OK(graph.WaitUntilIdle());
+  };
+  auto bound_fn = [&](std::string stream, int ts) {
+    MP_ASSERT_OK(graph.SetInputStreamTimestampBound(stream, Timestamp(ts)));
+    MP_ASSERT_OK(graph.WaitUntilIdle());
+  };
+
+  // Send in a frame packet.
+  send_fn("frame", "frame_0", 0);
+  // The frame is not processed yet.
+  EXPECT_THAT(frame_packets, ElementsAreArray(PacketMatchers<std::string>({})));
+  bound_fn("config", 10000);
+  // The frame is processed after a fresh config timestamp bound arrives.
+  EXPECT_THAT(frame_packets,
+              ElementsAreArray(PacketMatchers<std::string>({
+                  MakePacket<std::string>("frame_0").At(Timestamp(0)),
+              })));
+
+  // Send in a frame packet.
+  send_fn("frame", "frame_1", 20000);
+  // The frame is not processed yet.
+  // The PassThroughCalculator with TimestampOffset 0 now propagates
+  // Timestamp bound 10000 to both "output_frame" and "output_config",
+  // which appears here as Packet().At(Timestamp(9999).  The timestamp
+  // bounds at 29999 and 50000 are propagated similarly.
+  EXPECT_THAT(frame_packets,
+              ElementsAreArray(PacketMatchers<std::string>({
+                  MakePacket<std::string>("frame_0").At(Timestamp(0)),
+                  Packet().At(Timestamp(9999)),
+              })));
+  bound_fn("config", 30000);
+  // The frame is processed after a fresh config timestamp bound arrives.
+  EXPECT_THAT(frame_packets,
+              ElementsAreArray(PacketMatchers<std::string>({
+                  MakePacket<std::string>("frame_0").At(Timestamp(0)),
+                  Packet().At(Timestamp(9999)),
+                  MakePacket<std::string>("frame_1").At(Timestamp(20000)),
+              })));
+
+  // Send in a frame packet.
+  send_fn("frame", "frame_2", 40000);
+  // The frame is not processed yet.
+  EXPECT_THAT(frame_packets,
+              ElementsAreArray(PacketMatchers<std::string>({
+                  MakePacket<std::string>("frame_0").At(Timestamp(0)),
+                  Packet().At(Timestamp(9999)),
+                  MakePacket<std::string>("frame_1").At(Timestamp(20000)),
+                  Packet().At(Timestamp(29999)),
+              })));
+  send_fn("config", "config_1", 50000);
+  // The frame is processed after a fresh config arrives.
+  EXPECT_THAT(frame_packets,
+              ElementsAreArray(PacketMatchers<std::string>({
+                  MakePacket<std::string>("frame_0").At(Timestamp(0)),
+                  Packet().At(Timestamp(9999)),
+                  MakePacket<std::string>("frame_1").At(Timestamp(20000)),
+                  Packet().At(Timestamp(29999)),
+                  MakePacket<std::string>("frame_2").At(Timestamp(40000)),
+              })));
+
+  // Send in a frame packet.
+  send_fn("frame", "frame_3", 60000);
+  // The frame is not processed yet.
+  EXPECT_THAT(frame_packets,
+              ElementsAreArray(PacketMatchers<std::string>({
+                  MakePacket<std::string>("frame_0").At(Timestamp(0)),
+                  Packet().At(Timestamp(9999)),
+                  MakePacket<std::string>("frame_1").At(Timestamp(20000)),
+                  Packet().At(Timestamp(29999)),
+                  MakePacket<std::string>("frame_2").At(Timestamp(40000)),
+                  Packet().At(Timestamp(50000)),
+              })));
+  bound_fn("config", 70000);
+  // The frame is processed after a fresh config timestamp bound arrives.
+  EXPECT_THAT(frame_packets,
+              ElementsAreArray(PacketMatchers<std::string>({
+                  MakePacket<std::string>("frame_0").At(Timestamp(0)),
+                  Packet().At(Timestamp(9999)),
+                  MakePacket<std::string>("frame_1").At(Timestamp(20000)),
+                  Packet().At(Timestamp(29999)),
+                  MakePacket<std::string>("frame_2").At(Timestamp(40000)),
+                  Packet().At(Timestamp(50000)),
+                  MakePacket<std::string>("frame_3").At(Timestamp(60000)),
+              })));
+
+  // One config packet is deleivered.
+  EXPECT_THAT(config_packets,
+              ElementsAreArray(PacketMatchers<std::string>({
+                  Packet().At(Timestamp(0)),
+                  Packet().At(Timestamp(9999)),
+                  Packet().At(Timestamp(20000)),
+                  Packet().At(Timestamp(29999)),
+                  Packet().At(Timestamp(40000)),
+                  MakePacket<std::string>("config_1").At(Timestamp(50000)),
+                  Packet().At(Timestamp(60000)),
+              })));
+
   // Shutdown the graph.
   MP_ASSERT_OK(graph.CloseAllPacketSources());
   MP_ASSERT_OK(graph.WaitUntilDone());
diff --git a/mediapipe/util/packet_test_util.h b/mediapipe/util/packet_test_util.h
index 106d7f8d4..61e9322e1 100644
--- a/mediapipe/util/packet_test_util.h
+++ b/mediapipe/util/packet_test_util.h
@@ -32,30 +32,29 @@ namespace mediapipe {
 namespace internal {
 
 template <typename PayloadType>
-class PacketMatcher : public ::testing::MatcherInterface<const Packet&> {
+class PacketMatcher : public testing::MatcherInterface<const Packet&> {
  public:
   template <typename InnerMatcher>
   explicit PacketMatcher(InnerMatcher inner_matcher)
       : inner_matcher_(
-            ::testing::SafeMatcherCast<const PayloadType&>(inner_matcher)) {}
+            testing::SafeMatcherCast<const PayloadType&>(inner_matcher)) {}
 
   // Returns true iff the packet contains value of PayloadType satisfying
   // the inner matcher.
-  bool MatchAndExplain(
-      const Packet& packet,
-      ::testing::MatchResultListener* listener) const override {
+  bool MatchAndExplain(const Packet& packet,
+                       testing::MatchResultListener* listener) const override {
     if (!packet.ValidateAsType<PayloadType>().ok()) {
       *listener << packet.DebugString() << " does not contain expected type "
                 << ExpectedTypeName();
       return false;
     }
-    ::testing::StringMatchResultListener match_listener;
+    testing::StringMatchResultListener match_listener;
     const PayloadType& payload = packet.Get<PayloadType>();
     const bool matches =
         inner_matcher_.MatchAndExplain(payload, &match_listener);
     const std::string explanation = match_listener.str();
     *listener << packet.DebugString() << " containing value "
-              << ::testing::PrintToString(payload);
+              << testing::PrintToString(payload);
     if (!explanation.empty()) {
       *listener << ", which " << explanation;
     }
@@ -78,9 +77,28 @@ class PacketMatcher : public ::testing::MatcherInterface<const Packet&> {
     return ::mediapipe::Demangle(typeid(PayloadType).name());
   }
 
-  const ::testing::Matcher<const PayloadType&> inner_matcher_;
+  const testing::Matcher<const PayloadType&> inner_matcher_;
 };
 
+inline std::string SourceString(Timestamp t) {
+  return (t.IsSpecialValue())
+             ? t.DebugString()
+             : absl::StrCat("Timestamp(", t.DebugString(), ")");
+}
+
+template <typename T>
+std::string SourceString(Packet packet) {
+  std::ostringstream oss;
+  if (packet.IsEmpty()) {
+    oss << "Packet()";
+  } else {
+    oss << "MakePacket<" << MediaPipeTypeStringOrDemangled<T>() << ">("
+        << packet.Get<T>() << ")";
+  }
+  oss << ".At(" << SourceString(packet.Timestamp()) << ")";
+  return oss.str();
+}
+
 }  // namespace internal
 
 // Creates matcher validating that the packet contains value of expected type
@@ -91,9 +109,9 @@ class PacketMatcher : public ::testing::MatcherInterface<const Packet&> {
 //
 // EXPECT_THAT(MakePacket<int>(42), PacketContains<int>(Eq(42)))
 template <typename PayloadType, typename InnerMatcher>
-inline ::testing::Matcher<const Packet&> PacketContains(
+inline testing::Matcher<const Packet&> PacketContains(
     InnerMatcher inner_matcher) {
-  return ::testing::MakeMatcher(
+  return testing::MakeMatcher(
       new internal::PacketMatcher<PayloadType>(inner_matcher));
 }
 
@@ -110,7 +128,7 @@ inline ::testing::Matcher<const Packet&> PacketContains(
 //                Eq(42)))
 template <typename PayloadType, typename TimestampMatcher,
           typename ContentMatcher>
-inline ::testing::Matcher<const Packet&> PacketContainsTimestampAndPayload(
+inline testing::Matcher<const Packet&> PacketContainsTimestampAndPayload(
     TimestampMatcher timestamp_matcher, ContentMatcher content_matcher) {
   return testing::AllOf(
       testing::Property("Packet::Timestamp", &Packet::Timestamp,
@@ -118,6 +136,46 @@ inline ::testing::Matcher<const Packet&> PacketContainsTimestampAndPayload(
       PacketContains<PayloadType>(content_matcher));
 }
 
+template <typename T>
+class PacketEqMatcher : public testing::MatcherInterface<Packet> {
+ public:
+  PacketEqMatcher(Packet packet) : packet_(packet) {}
+  void DescribeTo(::std::ostream* os) const override {
+    *os << "The expected packet: " << internal::SourceString<T>(packet_);
+  }
+  bool MatchAndExplain(Packet value,
+                       testing::MatchResultListener* listener) const override {
+    bool unequal = (value.Timestamp() != packet_.Timestamp() ||
+                    value.IsEmpty() != packet_.IsEmpty() ||
+                    (!value.IsEmpty() && value.Get<T>() != packet_.Get<T>()));
+    if (unequal && listener->IsInterested()) {
+      *listener << "The actual packet: " << internal::SourceString<T>(value);
+    }
+    return !unequal;
+  }
+  const Packet packet_;
+};
+
+template <typename T>
+testing::Matcher<Packet> PacketEq(Packet packet) {
+  return MakeMatcher(new PacketEqMatcher<T>(packet));
+}
+
+template <typename T>
+std::vector<testing::Matcher<Packet>> PacketMatchers(
+    std::vector<Packet> packets) {
+  std::vector<testing::Matcher<Packet>> result;
+  for (const auto& packet : packets) {
+    result.push_back(PacketEq<T>(packet));
+  }
+  return result;
+}
+
+}  // namespace mediapipe
+
+namespace mediapipe {
+using mediapipe::PacketContains;
+using mediapipe::PacketContainsTimestampAndPayload;
 }  // namespace mediapipe
 
 #endif  // MEDIAPIPE_UTIL_PACKET_TEST_UTIL_H_