diff --git a/modules/video_coding/packet_buffer.cc b/modules/video_coding/packet_buffer.cc
index 781a5a2..11cc06e 100644
--- a/modules/video_coding/packet_buffer.cc
+++ b/modules/video_coding/packet_buffer.cc
@@ -36,15 +36,15 @@
     Clock* clock,
     size_t start_buffer_size,
     size_t max_buffer_size,
-    OnReceivedFrameCallback* received_frame_callback) {
+    OnAssembledFrameCallback* assembled_frame_callback) {
   return rtc::scoped_refptr<PacketBuffer>(new PacketBuffer(
-      clock, start_buffer_size, max_buffer_size, received_frame_callback));
+      clock, start_buffer_size, max_buffer_size, assembled_frame_callback));
 }
 
 PacketBuffer::PacketBuffer(Clock* clock,
                            size_t start_buffer_size,
                            size_t max_buffer_size,
-                           OnReceivedFrameCallback* received_frame_callback)
+                           OnAssembledFrameCallback* assembled_frame_callback)
     : clock_(clock),
       size_(start_buffer_size),
       max_size_(max_buffer_size),
@@ -53,7 +53,7 @@
       is_cleared_to_first_seq_num_(false),
       data_buffer_(start_buffer_size),
       sequence_buffer_(start_buffer_size),
-      received_frame_callback_(received_frame_callback),
+      assembled_frame_callback_(assembled_frame_callback),
       unique_frames_seen_(0),
       sps_pps_idr_is_h264_keyframe_(
           field_trial::IsEnabled("WebRTC-SpsPpsIdrIsH264Keyframe")) {
@@ -133,7 +133,7 @@
   }
 
   for (std::unique_ptr<RtpFrameObject>& frame : found_frames)
-    received_frame_callback_->OnReceivedFrame(std::move(frame));
+    assembled_frame_callback_->OnAssembledFrame(std::move(frame));
 
   return true;
 }
@@ -203,7 +203,7 @@
   }
 
   for (std::unique_ptr<RtpFrameObject>& frame : found_frames)
-    received_frame_callback_->OnReceivedFrame(std::move(frame));
+    assembled_frame_callback_->OnAssembledFrame(std::move(frame));
 }
 
 absl::optional<int64_t> PacketBuffer::LastReceivedPacketMs() const {
diff --git a/modules/video_coding/packet_buffer.h b/modules/video_coding/packet_buffer.h
index 0da504f..20e0bff 100644
--- a/modules/video_coding/packet_buffer.h
+++ b/modules/video_coding/packet_buffer.h
@@ -32,11 +32,11 @@
 
 class RtpFrameObject;
 
-// A received frame is a frame which has received all its packets.
-class OnReceivedFrameCallback {
+// A frame is assembled when all of its packets have been received.
+class OnAssembledFrameCallback {
  public:
-  virtual ~OnReceivedFrameCallback() {}
-  virtual void OnReceivedFrame(std::unique_ptr<RtpFrameObject> frame) = 0;
+  virtual ~OnAssembledFrameCallback() {}
+  virtual void OnAssembledFrame(std::unique_ptr<RtpFrameObject> frame) = 0;
 };
 
 class PacketBuffer {
@@ -45,7 +45,7 @@
       Clock* clock,
       size_t start_buffer_size,
       size_t max_buffer_size,
-      OnReceivedFrameCallback* frame_callback);
+      OnAssembledFrameCallback* frame_callback);
 
   virtual ~PacketBuffer();
 
@@ -72,7 +72,7 @@
   PacketBuffer(Clock* clock,
                size_t start_buffer_size,
                size_t max_buffer_size,
-               OnReceivedFrameCallback* frame_callback);
+               OnAssembledFrameCallback* frame_callback);
 
  private:
   friend RtpFrameObject;
@@ -155,8 +155,9 @@
   // and information needed to determine the continuity between packets.
   std::vector<ContinuityInfo> sequence_buffer_ RTC_GUARDED_BY(crit_);
 
-  // Called when a received frame is found.
-  OnReceivedFrameCallback* const received_frame_callback_;
+  // Called when all packets in a frame are received, allowing the frame
+  // to be assembled.
+  OnAssembledFrameCallback* const assembled_frame_callback_;
 
   // Timestamp (not RTP timestamp) of the last received packet/keyframe packet.
   absl::optional<int64_t> last_received_packet_ms_ RTC_GUARDED_BY(crit_);
diff --git a/modules/video_coding/video_packet_buffer_unittest.cc b/modules/video_coding/video_packet_buffer_unittest.cc
index 72bb990..c51c3b4 100644
--- a/modules/video_coding/video_packet_buffer_unittest.cc
+++ b/modules/video_coding/video_packet_buffer_unittest.cc
@@ -25,7 +25,7 @@
 namespace video_coding {
 
 class TestPacketBuffer : public ::testing::Test,
-                         public OnReceivedFrameCallback {
+                         public OnAssembledFrameCallback {
  protected:
   TestPacketBuffer() : TestPacketBuffer("") {}
   explicit TestPacketBuffer(std::string field_trials)
@@ -37,7 +37,7 @@
 
   uint16_t Rand() { return rand_.Rand<uint16_t>(); }
 
-  void OnReceivedFrame(std::unique_ptr<RtpFrameObject> frame) override {
+  void OnAssembledFrame(std::unique_ptr<RtpFrameObject> frame) override {
     uint16_t first_seq_num = frame->first_seq_num();
     if (frames_from_callback_.find(first_seq_num) !=
         frames_from_callback_.end()) {
diff --git a/test/fuzzers/packet_buffer_fuzzer.cc b/test/fuzzers/packet_buffer_fuzzer.cc
index 56d1557..709c14c 100644
--- a/test/fuzzers/packet_buffer_fuzzer.cc
+++ b/test/fuzzers/packet_buffer_fuzzer.cc
@@ -15,8 +15,8 @@
 
 namespace webrtc {
 namespace {
-class NullCallback : public video_coding::OnReceivedFrameCallback {
-  void OnReceivedFrame(std::unique_ptr<video_coding::RtpFrameObject> frame) {}
+class NullCallback : public video_coding::OnAssembledFrameCallback {
+  void OnAssembledFrame(std::unique_ptr<video_coding::RtpFrameObject> frame) {}
 };
 }  // namespace
 
diff --git a/video/buffered_frame_decryptor_unittest.cc b/video/buffered_frame_decryptor_unittest.cc
index ff3f11a..9230b47 100644
--- a/video/buffered_frame_decryptor_unittest.cc
+++ b/video/buffered_frame_decryptor_unittest.cc
@@ -60,7 +60,7 @@
 class BufferedFrameDecryptorTest
     : public ::testing::Test,
       public OnDecryptedFrameCallback,
-      public video_coding::OnReceivedFrameCallback {
+      public video_coding::OnAssembledFrameCallback {
  public:
   // Implements the OnDecryptedFrameCallbackInterface
   void OnDecryptedFrame(
@@ -68,8 +68,8 @@
     decrypted_frame_call_count_++;
   }
 
-  // Implements the OnReceivedFrameCallback interface.
-  void OnReceivedFrame(
+  // Implements the OnAssembledFrameCallback interface.
+  void OnAssembledFrame(
       std::unique_ptr<video_coding::RtpFrameObject> frame) override {}
 
   // Returns a new fake RtpFrameObject it abstracts the difficult construction
diff --git a/video/rtp_video_stream_receiver.cc b/video/rtp_video_stream_receiver.cc
index 1b17ac4..df492ff 100644
--- a/video/rtp_video_stream_receiver.cc
+++ b/video/rtp_video_stream_receiver.cc
@@ -382,7 +382,7 @@
   return rtp_rtcp_->SendNACK(sequence_numbers, length);
 }
 
-void RtpVideoStreamReceiver::OnReceivedFrame(
+void RtpVideoStreamReceiver::OnAssembledFrame(
     std::unique_ptr<video_coding::RtpFrameObject> frame) {
   RTC_DCHECK_RUN_ON(&network_tc_);
   // Request a key frame as soon as possible.
diff --git a/video/rtp_video_stream_receiver.h b/video/rtp_video_stream_receiver.h
index c1ee662..08c3e5a 100644
--- a/video/rtp_video_stream_receiver.h
+++ b/video/rtp_video_stream_receiver.h
@@ -59,7 +59,7 @@
                                public RtpPacketSinkInterface,
                                public VCMFrameTypeCallback,
                                public VCMPacketRequestCallback,
-                               public video_coding::OnReceivedFrameCallback,
+                               public video_coding::OnAssembledFrameCallback,
                                public video_coding::OnCompleteFrameCallback,
                                public OnDecryptedFrameCallback {
  public:
@@ -127,8 +127,8 @@
   int32_t ResendPackets(const uint16_t* sequenceNumbers,
                         uint16_t length) override;
 
-  // Implements OnReceivedFrameCallback.
-  void OnReceivedFrame(
+  // Implements OnAssembledFrameCallback.
+  void OnAssembledFrame(
       std::unique_ptr<video_coding::RtpFrameObject> frame) override;
 
   // Implements OnCompleteFrameCallback.