diff --git a/api/peer_connection_interface.h b/api/peer_connection_interface.h
index 4349d6bb3c..d280b30ada 100644
--- a/api/peer_connection_interface.h
+++ b/api/peer_connection_interface.h
@@ -1041,15 +1041,17 @@ class RTC_EXPORT PeerConnectionInterface : public webrtc::RefCountInterface {
   // The observer is invoked as soon as the operation completes, which could be
   // before or after the SetLocalDescription() method has exited.
   virtual void SetLocalDescription(
-      std::unique_ptr<SessionDescriptionInterface> desc,
-      rtc::scoped_refptr<SetLocalDescriptionObserverInterface> observer) {}
+      std::unique_ptr<SessionDescriptionInterface> /* desc */,
+      rtc::scoped_refptr<SetLocalDescriptionObserverInterface> /* observer */) {
+  }
   // Creates an offer or answer (depending on current signaling state) and sets
   // it as the local session description.
   //
   // The observer is invoked as soon as the operation completes, which could be
   // before or after the SetLocalDescription() method has exited.
   virtual void SetLocalDescription(
-      rtc::scoped_refptr<SetLocalDescriptionObserverInterface> observer) {}
+      rtc::scoped_refptr<SetLocalDescriptionObserverInterface> /* observer */) {
+  }
   // Like SetLocalDescription() above, but the observer is invoked with a delay
   // after the operation completes. This helps avoid recursive calls by the
   // observer but also makes it possible for states to change in-between the
@@ -1059,7 +1061,8 @@ class RTC_EXPORT PeerConnectionInterface : public webrtc::RefCountInterface {
   // ones taking SetLocalDescriptionObserverInterface as argument.
   virtual void SetLocalDescription(SetSessionDescriptionObserver* observer,
                                    SessionDescriptionInterface* desc) = 0;
-  virtual void SetLocalDescription(SetSessionDescriptionObserver* observer) {}
+  virtual void SetLocalDescription(
+      SetSessionDescriptionObserver* /* observer */) {}
 
   // Sets the remote session description.
   //
@@ -1078,8 +1081,9 @@ class RTC_EXPORT PeerConnectionInterface : public webrtc::RefCountInterface {
   // for synchronizing peer connection states to the application.
   // TODO(https://crbug.com/webrtc/11798): Delete this method in favor of the
   // ones taking SetRemoteDescriptionObserverInterface as argument.
-  virtual void SetRemoteDescription(SetSessionDescriptionObserver* observer,
-                                    SessionDescriptionInterface* desc) {}
+  virtual void SetRemoteDescription(
+      SetSessionDescriptionObserver* /* observer */,
+      SessionDescriptionInterface* /* desc */) {}
 
   // According to spec, we must only fire "negotiationneeded" if the Operations
   // Chain is empty. This method takes care of validating an event previously
@@ -1124,8 +1128,9 @@ class RTC_EXPORT PeerConnectionInterface : public webrtc::RefCountInterface {
   virtual bool AddIceCandidate(const IceCandidateInterface* candidate) = 0;
   // TODO(hbos): Remove default implementation once implemented by downstream
   // projects.
-  virtual void AddIceCandidate(std::unique_ptr<IceCandidateInterface> candidate,
-                               std::function<void(RTCError)> callback) {}
+  virtual void AddIceCandidate(
+      std::unique_ptr<IceCandidateInterface> /* candidate */,
+      std::function<void(RTCError)> /* callback */) {}
 
   // Removes a group of remote candidates from the ICE agent. Needed mainly for
   // continual gathering, to avoid an ever-growing list of candidates as
diff --git a/api/test/video_quality_analyzer_interface.h b/api/test/video_quality_analyzer_interface.h
index c9b7851ab0..b8c510262e 100644
--- a/api/test/video_quality_analyzer_interface.h
+++ b/api/test/video_quality_analyzer_interface.h
@@ -127,45 +127,47 @@ class VideoQualityAnalyzerInterface
   // Will be called when frame will be obtained from PeerConnection stack.
   // `peer_name` is name of the peer on which side frame was rendered.
   virtual void OnFrameRendered(absl::string_view /* peer_name */,
-                               const VideoFrame& frame) {}
+                               const VideoFrame& /* frame */) {}
   // Will be called if encoder return not WEBRTC_VIDEO_CODEC_OK.
   // All available codes are listed in
   // modules/video_coding/include/video_error_codes.h
   // `peer_name` is name of the peer on which side error acquired.
-  virtual void OnEncoderError(absl::string_view peer_name,
-                              const VideoFrame& frame,
-                              int32_t error_code) {}
+  virtual void OnEncoderError(absl::string_view /* peer_name */,
+                              const VideoFrame& /* frame */,
+                              int32_t /* error_code */) {}
   // Will be called if decoder return not WEBRTC_VIDEO_CODEC_OK.
   // All available codes are listed in
   // modules/video_coding/include/video_error_codes.h
   // `peer_name` is name of the peer on which side error acquired.
-  virtual void OnDecoderError(absl::string_view peer_name,
-                              uint16_t frame_id,
-                              int32_t error_code,
-                              const DecoderStats& stats) {}
+  virtual void OnDecoderError(absl::string_view /* peer_name */,
+                              uint16_t /* frame_id */,
+                              int32_t /* error_code */,
+                              const DecoderStats& /* stats */) {}
   // Will be called every time new stats reports are available for the
   // Peer Connection identified by `pc_label`.
   void OnStatsReports(
-      absl::string_view pc_label,
-      const rtc::scoped_refptr<const RTCStatsReport>& report) override {}
+      absl::string_view /* pc_label */,
+      const rtc::scoped_refptr<const RTCStatsReport>& /* report */) override {}
 
   // Will be called before test adds new participant in the middle of a call.
-  virtual void RegisterParticipantInCall(absl::string_view peer_name) {}
+  virtual void RegisterParticipantInCall(absl::string_view /* peer_name */) {}
   // Will be called after test removed existing participant in the middle of the
   // call.
-  virtual void UnregisterParticipantInCall(absl::string_view peer_name) {}
+  virtual void UnregisterParticipantInCall(absl::string_view /* peer_name */) {}
 
   // Informs analyzer that peer `receiver_peer_name` should not receive any
   // stream from sender `sender_peer_name`.
   // This method is a no-op if the sender or the receiver does not exist.
-  virtual void OnPauseAllStreamsFrom(absl::string_view sender_peer_name,
-                                     absl::string_view receiver_peer_name) {}
+  virtual void OnPauseAllStreamsFrom(
+      absl::string_view /* sender_peer_name */,
+      absl::string_view /* receiver_peer_name */) {}
 
   // Informs analyzer that peer `receiver_peer_name` is expected to receive all
   // streams from `sender_peer_name`.
   // This method is a no-op if the sender or the receiver does not exist.
-  virtual void OnResumeAllStreamsFrom(absl::string_view sender_peer_name,
-                                      absl::string_view receiver_peer_name) {}
+  virtual void OnResumeAllStreamsFrom(
+      absl::string_view /* sender_peer_name */,
+      absl::string_view /* receiver_peer_name */) {}
 
   // Tells analyzer that analysis complete and it should calculate final
   // statistics.
@@ -179,7 +181,7 @@ class VideoQualityAnalyzerInterface
   // Returns the sender peer name of the last stream where this frame was
   // captured. The sender for this frame id may change when the frame ids wrap
   // around. Also it will crash, if the specified `frame_id` wasn't captured.
-  virtual std::string GetSenderPeerName(uint16_t frame_id) const {
+  virtual std::string GetSenderPeerName(uint16_t /* frame_id */) const {
     RTC_CHECK(false) << "Not implemented.";
   }
 };
diff --git a/api/video_codecs/test/video_encoder_factory_template_tests.cc b/api/video_codecs/test/video_encoder_factory_template_tests.cc
index e473297f17..9860104417 100644
--- a/api/video_codecs/test/video_encoder_factory_template_tests.cc
+++ b/api/video_codecs/test/video_encoder_factory_template_tests.cc
@@ -68,7 +68,7 @@ struct BarEncoderTemplateAdapter {
 
   static std::unique_ptr<VideoEncoder> CreateEncoder(
       const Environment& /* env */,
-      const SdpVideoFormat& format) {
+      const SdpVideoFormat& /* format */) {
     return std::make_unique<StrictMock<MockVideoEncoder>>();
   }
 
diff --git a/api/video_codecs/test/video_encoder_software_fallback_wrapper_unittest.cc b/api/video_codecs/test/video_encoder_software_fallback_wrapper_unittest.cc
index 11f234d1c7..c08b3e44ec 100644
--- a/api/video_codecs/test/video_encoder_software_fallback_wrapper_unittest.cc
+++ b/api/video_codecs/test/video_encoder_software_fallback_wrapper_unittest.cc
@@ -83,8 +83,9 @@ VideoEncoder::EncoderInfo GetEncoderInfoWithHardwareAccelerated(
 
 class FakeEncodedImageCallback : public EncodedImageCallback {
  public:
-  Result OnEncodedImage(const EncodedImage& encoded_image,
-                        const CodecSpecificInfo* codec_specific_info) override {
+  Result OnEncodedImage(
+      const EncodedImage& /* encoded_image */,
+      const CodecSpecificInfo* /* codec_specific_info */) override {
     ++callback_count_;
     return Result(Result::OK, callback_count_);
   }
@@ -109,18 +110,19 @@ class VideoEncoderSoftwareFallbackWrapperTestBase : public ::testing::Test {
   class CountingFakeEncoder : public VideoEncoder {
    public:
     void SetFecControllerOverride(
-        FecControllerOverride* fec_controller_override) override {
+        FecControllerOverride* /* fec_controller_override */) override {
       // Ignored.
     }
 
-    int32_t InitEncode(const VideoCodec* codec_settings,
-                       const VideoEncoder::Settings& settings) override {
+    int32_t InitEncode(const VideoCodec* /* codec_settings */,
+                       const VideoEncoder::Settings& /* settings */) override {
       ++init_encode_count_;
       return init_encode_return_code_;
     }
 
-    int32_t Encode(const VideoFrame& frame,
-                   const std::vector<VideoFrameType>* frame_types) override {
+    int32_t Encode(
+        const VideoFrame& frame,
+        const std::vector<VideoFrameType>* /* frame_types */) override {
       ++encode_count_;
       last_video_frame_ = frame;
       if (encode_complete_callback_ &&
@@ -141,7 +143,7 @@ class VideoEncoderSoftwareFallbackWrapperTestBase : public ::testing::Test {
       return WEBRTC_VIDEO_CODEC_OK;
     }
 
-    void SetRates(const RateControlParameters& parameters) override {}
+    void SetRates(const RateControlParameters& /* parameters */) override {}
 
     EncoderInfo GetEncoderInfo() const override {
       ++supports_native_handle_count_;
@@ -986,7 +988,7 @@ TEST_F(PreferTemporalLayersFallbackTest, PrimesEncoderOnSwitch) {
   FakeEncodedImageCallback callback1;
   class DummyFecControllerOverride : public FecControllerOverride {
    public:
-    void SetFecAllowed(bool fec_allowed) override {}
+    void SetFecAllowed(bool /* fec_allowed */) override {}
   };
   DummyFecControllerOverride fec_controller_override1;
   VideoEncoder::RateControlParameters rate_params1;
diff --git a/api/video_codecs/video_decoder_factory_template_dav1d_adapter.h b/api/video_codecs/video_decoder_factory_template_dav1d_adapter.h
index cf2fc85e45..128d3245c6 100644
--- a/api/video_codecs/video_decoder_factory_template_dav1d_adapter.h
+++ b/api/video_codecs/video_decoder_factory_template_dav1d_adapter.h
@@ -25,7 +25,7 @@ struct Dav1dDecoderTemplateAdapter {
   }
 
   static std::unique_ptr<VideoDecoder> CreateDecoder(
-      const SdpVideoFormat& format) {
+      const SdpVideoFormat& /* format */) {
     return CreateDav1dDecoder();
   }
 };
diff --git a/api/video_codecs/video_decoder_factory_template_libvpx_vp8_adapter.h b/api/video_codecs/video_decoder_factory_template_libvpx_vp8_adapter.h
index 303e320c6e..b5aac982aa 100644
--- a/api/video_codecs/video_decoder_factory_template_libvpx_vp8_adapter.h
+++ b/api/video_codecs/video_decoder_factory_template_libvpx_vp8_adapter.h
@@ -27,7 +27,7 @@ struct LibvpxVp8DecoderTemplateAdapter {
 
   static std::unique_ptr<VideoDecoder> CreateDecoder(
       const Environment& env,
-      const SdpVideoFormat& format) {
+      const SdpVideoFormat& /* format */) {
     return CreateVp8Decoder(env);
   }
 };
diff --git a/api/video_codecs/video_decoder_factory_template_libvpx_vp9_adapter.h b/api/video_codecs/video_decoder_factory_template_libvpx_vp9_adapter.h
index 0f329a12a4..7e80988888 100644
--- a/api/video_codecs/video_decoder_factory_template_libvpx_vp9_adapter.h
+++ b/api/video_codecs/video_decoder_factory_template_libvpx_vp9_adapter.h
@@ -25,7 +25,7 @@ struct LibvpxVp9DecoderTemplateAdapter {
   }
 
   static std::unique_ptr<VideoDecoder> CreateDecoder(
-      const SdpVideoFormat& format) {
+      const SdpVideoFormat& /* format */) {
     return VP9Decoder::Create();
   }
 };
diff --git a/api/video_codecs/video_decoder_factory_template_open_h264_adapter.h b/api/video_codecs/video_decoder_factory_template_open_h264_adapter.h
index 7f1d4c8c6b..c17157eed6 100644
--- a/api/video_codecs/video_decoder_factory_template_open_h264_adapter.h
+++ b/api/video_codecs/video_decoder_factory_template_open_h264_adapter.h
@@ -32,7 +32,7 @@ struct OpenH264DecoderTemplateAdapter {
   }
 
   static std::unique_ptr<VideoDecoder> CreateDecoder(
-      const SdpVideoFormat& format) {
+      const SdpVideoFormat& /* format */) {
 #if defined(WEBRTC_USE_H264)
 
     return H264Decoder::Create();
diff --git a/api/video_codecs/video_encoder_factory_template_libaom_av1_adapter.h b/api/video_codecs/video_encoder_factory_template_libaom_av1_adapter.h
index 454ba353d9..10cc1cc152 100644
--- a/api/video_codecs/video_encoder_factory_template_libaom_av1_adapter.h
+++ b/api/video_codecs/video_encoder_factory_template_libaom_av1_adapter.h
@@ -32,7 +32,7 @@ struct LibaomAv1EncoderTemplateAdapter {
 
   static std::unique_ptr<VideoEncoder> CreateEncoder(
       const Environment& env,
-      const SdpVideoFormat& format) {
+      const SdpVideoFormat& /* format */) {
     return CreateLibaomAv1Encoder(env);
   }
 
diff --git a/api/video_codecs/video_encoder_factory_template_libvpx_vp8_adapter.h b/api/video_codecs/video_encoder_factory_template_libvpx_vp8_adapter.h
index fed796fc76..6e8e290a1d 100644
--- a/api/video_codecs/video_encoder_factory_template_libvpx_vp8_adapter.h
+++ b/api/video_codecs/video_encoder_factory_template_libvpx_vp8_adapter.h
@@ -36,7 +36,7 @@ struct LibvpxVp8EncoderTemplateAdapter {
 
   static std::unique_ptr<VideoEncoder> CreateEncoder(
       const Environment& env,
-      const SdpVideoFormat& format) {
+      const SdpVideoFormat& /* format */) {
     return CreateVp8Encoder(env);
   }
 
diff --git a/api/video_codecs/video_encoder_factory_template_open_h264_adapter.h b/api/video_codecs/video_encoder_factory_template_open_h264_adapter.h
index f72e381e24..837ef6ef98 100644
--- a/api/video_codecs/video_encoder_factory_template_open_h264_adapter.h
+++ b/api/video_codecs/video_encoder_factory_template_open_h264_adapter.h
@@ -33,8 +33,8 @@ struct OpenH264EncoderTemplateAdapter {
   }
 
   static std::unique_ptr<VideoEncoder> CreateEncoder(
-      const Environment& env,
-      const SdpVideoFormat& format) {
+      [[maybe_unused]] const Environment& env,
+      [[maybe_unused]] const SdpVideoFormat& format) {
 #if defined(WEBRTC_USE_H264)
     return CreateH264Encoder(env, H264EncoderSettings::Parse(format));
 #else
@@ -42,7 +42,8 @@ struct OpenH264EncoderTemplateAdapter {
 #endif
   }
 
-  static bool IsScalabilityModeSupported(ScalabilityMode scalability_mode) {
+  static bool IsScalabilityModeSupported(
+      [[maybe_unused]] ScalabilityMode scalability_mode) {
 #if defined(WEBRTC_USE_H264)
     return H264Encoder::SupportsScalabilityMode(scalability_mode);
 #else
diff --git a/api/video_codecs/vp8_temporal_layers_factory.cc b/api/video_codecs/vp8_temporal_layers_factory.cc
index 9457611b1f..9ba589e9c7 100644
--- a/api/video_codecs/vp8_temporal_layers_factory.cc
+++ b/api/video_codecs/vp8_temporal_layers_factory.cc
@@ -29,7 +29,7 @@ namespace webrtc {
 
 std::unique_ptr<Vp8FrameBufferController> Vp8TemporalLayersFactory::Create(
     const VideoCodec& codec,
-    const VideoEncoder::Settings& settings,
+    const VideoEncoder::Settings& /* settings */,
     FecControllerOverride* fec_controller_override) {
   std::vector<std::unique_ptr<Vp8FrameBufferController>> controllers;
   const int num_streams = SimulcastUtility::NumberOfSimulcastStreams(codec);
diff --git a/audio/audio_receive_stream.cc b/audio/audio_receive_stream.cc
index 48e1386413..d693a47263 100644
--- a/audio/audio_receive_stream.cc
+++ b/audio/audio_receive_stream.cc
@@ -95,7 +95,7 @@ AudioReceiveStreamImpl::AudioReceiveStreamImpl(
 }
 
 AudioReceiveStreamImpl::AudioReceiveStreamImpl(
-    const Environment& env,
+    const Environment& /* env */,
     PacketRouter* packet_router,
     const webrtc::AudioReceiveStreamInterface::Config& config,
     const rtc::scoped_refptr<webrtc::AudioState>& audio_state,
diff --git a/audio/audio_send_stream_tests.cc b/audio/audio_send_stream_tests.cc
index 6e394a7673..e042685e66 100644
--- a/audio/audio_send_stream_tests.cc
+++ b/audio/audio_send_stream_tests.cc
@@ -64,7 +64,7 @@ TEST_F(AudioSendStreamCallTest, SupportsCName) {
 
     void ModifyAudioConfigs(AudioSendStream::Config* send_config,
                             std::vector<AudioReceiveStreamInterface::Config>*
-                                receive_configs) override {
+                            /* receive_configs */) override {
       send_config->rtp.c_name = kCName;
     }
 
@@ -93,7 +93,7 @@ TEST_F(AudioSendStreamCallTest, NoExtensionsByDefault) {
 
     void ModifyAudioConfigs(AudioSendStream::Config* send_config,
                             std::vector<AudioReceiveStreamInterface::Config>*
-                                receive_configs) override {
+                            /* receive_configs */) override {
       send_config->rtp.extensions.clear();
     }
 
@@ -131,7 +131,7 @@ TEST_F(AudioSendStreamCallTest, SupportsAudioLevel) {
 
     void ModifyAudioConfigs(AudioSendStream::Config* send_config,
                             std::vector<AudioReceiveStreamInterface::Config>*
-                                receive_configs) override {
+                            /* receive_configs */) override {
       send_config->rtp.extensions.clear();
       send_config->rtp.extensions.push_back(
           RtpExtension(RtpExtension::kAudioLevelUri, kAudioLevelExtensionId));
@@ -173,7 +173,7 @@ class TransportWideSequenceNumberObserver : public AudioSendTest {
 
   void ModifyAudioConfigs(AudioSendStream::Config* send_config,
                           std::vector<AudioReceiveStreamInterface::Config>*
-                              receive_configs) override {
+                          /* receive_configs */) override {
     send_config->rtp.extensions.clear();
     send_config->rtp.extensions.push_back(
         RtpExtension(RtpExtension::kTransportSequenceNumberUri,
@@ -225,7 +225,7 @@ TEST_F(AudioSendStreamCallTest, SendDtmf) {
 
     void OnAudioStreamsCreated(AudioSendStream* send_stream,
                                const std::vector<AudioReceiveStreamInterface*>&
-                                   receive_streams) override {
+                               /* receive_streams */) override {
       // Need to start stream here, else DTMF events are dropped.
       send_stream->Start();
       for (int event = kDtmfEventFirst; event <= kDtmfEventLast; ++event) {
diff --git a/audio/audio_send_stream_unittest.cc b/audio/audio_send_stream_unittest.cc
index 7198a61132..c487d7b87d 100644
--- a/audio/audio_send_stream_unittest.cc
+++ b/audio/audio_send_stream_unittest.cc
@@ -235,7 +235,8 @@ struct ConfigHelper {
   void SetupMockForSetupSendCodec(bool expect_set_encoder_call) {
     if (expect_set_encoder_call) {
       EXPECT_CALL(*channel_send_, SetEncoder)
-          .WillOnce([this](int payload_type, const SdpAudioFormat& format,
+          .WillOnce([this](int /* payload_type */,
+                           const SdpAudioFormat& /* format */,
                            std::unique_ptr<AudioEncoder> encoder) {
             this->audio_encoder_ = std::move(encoder);
             return true;
@@ -581,8 +582,8 @@ TEST(AudioSendStreamTest, SendCodecCanApplyVad) {
     helper.config().send_codec_spec->cng_payload_type = 105;
     std::unique_ptr<AudioEncoder> stolen_encoder;
     EXPECT_CALL(*helper.channel_send(), SetEncoder)
-        .WillOnce([&stolen_encoder](int payload_type,
-                                    const SdpAudioFormat& format,
+        .WillOnce([&stolen_encoder](int /* payload_type */,
+                                    const SdpAudioFormat& /* format */,
                                     std::unique_ptr<AudioEncoder> encoder) {
           stolen_encoder = std::move(encoder);
           return true;
diff --git a/audio/audio_state_unittest.cc b/audio/audio_state_unittest.cc
index 070e220979..954e6c19c3 100644
--- a/audio/audio_state_unittest.cc
+++ b/audio/audio_state_unittest.cc
@@ -52,8 +52,8 @@ struct FakeAsyncAudioProcessingHelper {
     FakeTaskQueueFactory() = default;
     ~FakeTaskQueueFactory() override = default;
     std::unique_ptr<TaskQueueBase, TaskQueueDeleter> CreateTaskQueue(
-        absl::string_view name,
-        Priority priority) const override {
+        absl::string_view /* name */,
+        Priority /* priority */) const override {
       return std::unique_ptr<webrtc::TaskQueueBase, webrtc::TaskQueueDeleter>(
           new FakeTaskQueue());
     }
diff --git a/audio/channel_receive_unittest.cc b/audio/channel_receive_unittest.cc
index ef9647d785..1c04fc98c9 100644
--- a/audio/channel_receive_unittest.cc
+++ b/audio/channel_receive_unittest.cc
@@ -128,7 +128,7 @@ class ChannelReceiveTest : public Test {
     return packet;
   }
 
-  void HandleGeneratedRtcp(ChannelReceiveInterface& channel,
+  void HandleGeneratedRtcp(ChannelReceiveInterface& /* channel */,
                            rtc::ArrayView<const uint8_t> packet) {
     if (packet[1] == rtcp::ReceiverReport::kPacketType) {
       // Ignore RR, it requires no response
diff --git a/audio/channel_send_frame_transformer_delegate_unittest.cc b/audio/channel_send_frame_transformer_delegate_unittest.cc
index a4ee9ff208..aa4eb783a8 100644
--- a/audio/channel_send_frame_transformer_delegate_unittest.cc
+++ b/audio/channel_send_frame_transformer_delegate_unittest.cc
@@ -188,10 +188,11 @@ TEST(ChannelSendFrameTransformerDelegateTest,
               SendFrame(_, 0, 0, ElementsAreArray(mock_data), _,
                         ElementsAreArray(csrcs), Optional(audio_level_dbov)));
   ON_CALL(*mock_frame_transformer, Transform)
-      .WillByDefault([&](std::unique_ptr<TransformableFrameInterface> frame) {
-        callback->OnTransformedFrame(CreateMockReceiverFrame(
-            csrcs, std::optional<uint8_t>(audio_level_dbov)));
-      });
+      .WillByDefault(
+          [&](std::unique_ptr<TransformableFrameInterface> /* frame */) {
+            callback->OnTransformedFrame(CreateMockReceiverFrame(
+                csrcs, std::optional<uint8_t>(audio_level_dbov)));
+          });
   delegate->Transform(AudioFrameType::kEmptyFrame, 0, 0, mock_data,
                       sizeof(mock_data), 0,
                       /*ssrc=*/0, /*mimeType=*/"audio/opus",
diff --git a/audio/channel_send_unittest.cc b/audio/channel_send_unittest.cc
index 31cdaa0c0d..25b48312b1 100644
--- a/audio/channel_send_unittest.cc
+++ b/audio/channel_send_unittest.cc
@@ -153,7 +153,7 @@ TEST_F(ChannelSendTest, IncreaseRtpTimestampByPauseDuration) {
   uint32_t timestamp;
   int sent_packets = 0;
   auto send_rtp = [&](rtc::ArrayView<const uint8_t> data,
-                      const PacketOptions& options) {
+                      const PacketOptions& /* options */) {
     ++sent_packets;
     RtpPacketReceived packet;
     packet.Parse(data);
diff --git a/audio/test/audio_end_to_end_test.cc b/audio/test/audio_end_to_end_test.cc
index 769d7d32d5..746ae3fea7 100644
--- a/audio/test/audio_end_to_end_test.cc
+++ b/audio/test/audio_end_to_end_test.cc
@@ -55,13 +55,13 @@ AudioEndToEndTest::CreateRenderer() {
 
 void AudioEndToEndTest::OnFakeAudioDevicesCreated(
     AudioDeviceModule* send_audio_device,
-    AudioDeviceModule* recv_audio_device) {
+    AudioDeviceModule* /* recv_audio_device */) {
   send_audio_device_ = send_audio_device;
 }
 
 void AudioEndToEndTest::ModifyAudioConfigs(
     AudioSendStream::Config* send_config,
-    std::vector<AudioReceiveStreamInterface::Config>* receive_configs) {
+    std::vector<AudioReceiveStreamInterface::Config>* /* receive_configs */) {
   // Large bitrate by default.
   const webrtc::SdpAudioFormat kDefaultFormat("opus", 48000, 2,
                                               {{"stereo", "1"}});
diff --git a/audio/voip/test/mock_task_queue.h b/audio/voip/test/mock_task_queue.h
index 547b0d3f75..6a769bfefb 100644
--- a/audio/voip/test/mock_task_queue.h
+++ b/audio/voip/test/mock_task_queue.h
@@ -39,8 +39,8 @@ class MockTaskQueueFactory : public TaskQueueFactory {
       : task_queue_(task_queue) {}
 
   std::unique_ptr<TaskQueueBase, TaskQueueDeleter> CreateTaskQueue(
-      absl::string_view name,
-      Priority priority) const override {
+      absl::string_view /* name */,
+      Priority /* priority */) const override {
     // Default MockTaskQueue::Delete is no-op, therefore it's safe to pass the
     // raw pointer.
     return std::unique_ptr<TaskQueueBase, TaskQueueDeleter>(task_queue_);
diff --git a/call/adaptation/resource_adaptation_processor.cc b/call/adaptation/resource_adaptation_processor.cc
index f4d1bf3538..4d46ddec52 100644
--- a/call/adaptation/resource_adaptation_processor.cc
+++ b/call/adaptation/resource_adaptation_processor.cc
@@ -357,7 +357,7 @@ void ResourceAdaptationProcessor::UpdateResourceLimitations(
 }
 
 void ResourceAdaptationProcessor::OnVideoSourceRestrictionsUpdated(
-    VideoSourceRestrictions restrictions,
+    VideoSourceRestrictions /* restrictions */,
     const VideoAdaptationCounters& adaptation_counters,
     rtc::scoped_refptr<Resource> reason,
     const VideoSourceRestrictions& unfiltered_restrictions) {
diff --git a/call/adaptation/resource_adaptation_processor_unittest.cc b/call/adaptation/resource_adaptation_processor_unittest.cc
index ccccd3fe04..acd9053f67 100644
--- a/call/adaptation/resource_adaptation_processor_unittest.cc
+++ b/call/adaptation/resource_adaptation_processor_unittest.cc
@@ -65,7 +65,7 @@ class VideoSourceRestrictionsListenerForTesting
       VideoSourceRestrictions restrictions,
       const VideoAdaptationCounters& adaptation_counters,
       rtc::scoped_refptr<Resource> reason,
-      const VideoSourceRestrictions& unfiltered_restrictions) override {
+      const VideoSourceRestrictions& /* unfiltered_restrictions */) override {
     RTC_DCHECK_RUN_ON(&sequence_checker_);
     ++restrictions_updated_count_;
     restrictions_ = restrictions;
diff --git a/call/adaptation/resource_unittest.cc b/call/adaptation/resource_unittest.cc
index a2291dfdce..e806756a89 100644
--- a/call/adaptation/resource_unittest.cc
+++ b/call/adaptation/resource_unittest.cc
@@ -36,7 +36,7 @@ TEST_F(ResourceTest, RegisteringListenerReceivesCallbacks) {
   fake_resource_->SetResourceListener(&resource_listener);
   EXPECT_CALL(resource_listener, OnResourceUsageStateMeasured(_, _))
       .Times(1)
-      .WillOnce([](rtc::scoped_refptr<Resource> resource,
+      .WillOnce([](rtc::scoped_refptr<Resource> /* resource */,
                    ResourceUsageState usage_state) {
         EXPECT_EQ(ResourceUsageState::kOveruse, usage_state);
       });
diff --git a/call/adaptation/test/fake_adaptation_constraint.cc b/call/adaptation/test/fake_adaptation_constraint.cc
index dbb31f0d3b..8fc5f671b2 100644
--- a/call/adaptation/test/fake_adaptation_constraint.cc
+++ b/call/adaptation/test/fake_adaptation_constraint.cc
@@ -31,9 +31,9 @@ std::string FakeAdaptationConstraint::Name() const {
 }
 
 bool FakeAdaptationConstraint::IsAdaptationUpAllowed(
-    const VideoStreamInputState& input_state,
-    const VideoSourceRestrictions& restrictions_before,
-    const VideoSourceRestrictions& restrictions_after) const {
+    const VideoStreamInputState& /* input_state */,
+    const VideoSourceRestrictions& /* restrictions_before */,
+    const VideoSourceRestrictions& /* restrictions_after */) const {
   return is_adaptation_up_allowed_;
 }
 
diff --git a/call/adaptation/video_stream_adapter.cc b/call/adaptation/video_stream_adapter.cc
index eb949c9628..0275b56379 100644
--- a/call/adaptation/video_stream_adapter.cc
+++ b/call/adaptation/video_stream_adapter.cc
@@ -686,7 +686,7 @@ Adaptation VideoStreamAdapter::GetAdaptationTo(
 }
 
 void VideoStreamAdapter::BroadcastVideoRestrictionsUpdate(
-    const VideoStreamInputState& input_state,
+    const VideoStreamInputState& /* input_state */,
     const rtc::scoped_refptr<Resource>& resource) {
   RTC_DCHECK_RUN_ON(&sequence_checker_);
   VideoSourceRestrictions filtered = FilterRestrictionsByDegradationPreference(
diff --git a/call/adaptation/video_stream_adapter_unittest.cc b/call/adaptation/video_stream_adapter_unittest.cc
index 162adf9bf7..e5521cd3fd 100644
--- a/call/adaptation/video_stream_adapter_unittest.cc
+++ b/call/adaptation/video_stream_adapter_unittest.cc
@@ -114,9 +114,9 @@ class FakeVideoStream {
 class FakeVideoStreamAdapterListner : public VideoSourceRestrictionsListener {
  public:
   void OnVideoSourceRestrictionsUpdated(
-      VideoSourceRestrictions restrictions,
-      const VideoAdaptationCounters& adaptation_counters,
-      rtc::scoped_refptr<Resource> reason,
+      VideoSourceRestrictions /* restrictions */,
+      const VideoAdaptationCounters& /* adaptation_counters */,
+      rtc::scoped_refptr<Resource> /* reason */,
       const VideoSourceRestrictions& unfiltered_restrictions) override {
     calls_++;
     last_restrictions_ = unfiltered_restrictions;
diff --git a/call/bitrate_allocator.cc b/call/bitrate_allocator.cc
index cd4260f833..1818b6746d 100644
--- a/call/bitrate_allocator.cc
+++ b/call/bitrate_allocator.cc
@@ -305,7 +305,7 @@ std::map<BitrateAllocatorObserver*, int> NormalRateAllocation(
 std::map<BitrateAllocatorObserver*, int> MaxRateAllocation(
     const std::vector<AllocatableTrack>& allocatable_tracks,
     uint32_t bitrate,
-    uint32_t sum_max_bitrates) {
+    uint32_t /* sum_max_bitrates */) {
   std::map<BitrateAllocatorObserver*, int> allocation;
 
   for (const auto& observer_config : allocatable_tracks) {
diff --git a/call/bitrate_allocator_unittest.cc b/call/bitrate_allocator_unittest.cc
index b8f0abf524..de8c61f23b 100644
--- a/call/bitrate_allocator_unittest.cc
+++ b/call/bitrate_allocator_unittest.cc
@@ -332,7 +332,7 @@ class BitrateAllocatorTestNoEnforceMin : public ::testing::Test {
                    uint32_t max_bitrate_bps,
                    uint32_t pad_up_bitrate_bps,
                    bool enforce_min_bitrate,
-                   absl::string_view track_id,
+                   absl::string_view /* track_id */,
                    double bitrate_priority) {
     allocator_->AddObserver(
         observer, {min_bitrate_bps, max_bitrate_bps, pad_up_bitrate_bps, 0,