diff --git a/common_types.cc b/common_types.cc
index 03d5d675ec..61e58b766f 100644
--- a/common_types.cc
+++ b/common_types.cc
@@ -78,7 +78,7 @@ static const char* kPayloadNameI420 = "I420";
 static const char* kPayloadNameRED = "RED";
 static const char* kPayloadNameULPFEC = "ULPFEC";
 static const char* kPayloadNameGeneric = "Generic";
-static const char* kPayloadNameMultiplex = "Multiplex";
+static const char* kPayloadNameStereo = "Stereo";
 
 static bool CodecNamesEq(const char* name1, const char* name2) {
   return _stricmp(name1, name2) == 0;
@@ -99,7 +99,7 @@ const char* CodecTypeToPayloadString(VideoCodecType type) {
     case kVideoCodecULPFEC:
       return kPayloadNameULPFEC;
     // Other codecs default to generic.
-    case kVideoCodecMultiplex:
+    case kVideoCodecStereo:
     case kVideoCodecFlexfec:
     case kVideoCodecGeneric:
     case kVideoCodecUnknown:
@@ -121,8 +121,8 @@ VideoCodecType PayloadStringToCodecType(const std::string& name) {
     return kVideoCodecRED;
   if (CodecNamesEq(name.c_str(), kPayloadNameULPFEC))
     return kVideoCodecULPFEC;
-  if (CodecNamesEq(name.c_str(), kPayloadNameMultiplex))
-    return kVideoCodecMultiplex;
+  if (CodecNamesEq(name.c_str(), kPayloadNameStereo))
+    return kVideoCodecStereo;
   return kVideoCodecGeneric;
 }
 
diff --git a/common_types.h b/common_types.h
index bd23f0f0de..5f9d77a9bd 100644
--- a/common_types.h
+++ b/common_types.h
@@ -485,7 +485,7 @@ enum VideoCodecType {
   kVideoCodecULPFEC,
   kVideoCodecFlexfec,
   kVideoCodecGeneric,
-  kVideoCodecMultiplex,
+  kVideoCodecStereo,
   kVideoCodecUnknown
 };
 
diff --git a/common_video/video_frame.cc b/common_video/video_frame.cc
index 1447fc1650..58342a9183 100644
--- a/common_video/video_frame.cc
+++ b/common_video/video_frame.cc
@@ -35,7 +35,7 @@ size_t EncodedImage::GetBufferPaddingBytes(VideoCodecType codec_type) {
     case kVideoCodecULPFEC:
     case kVideoCodecFlexfec:
     case kVideoCodecGeneric:
-    case kVideoCodecMultiplex:
+    case kVideoCodecStereo:
     case kVideoCodecUnknown:
       return 0;
   }
diff --git a/media/BUILD.gn b/media/BUILD.gn
index f0aaf455c0..b856bb5085 100644
--- a/media/BUILD.gn
+++ b/media/BUILD.gn
@@ -164,8 +164,6 @@ rtc_static_library("rtc_internal_video_codecs") {
     "engine/internaldecoderfactory.h",
     "engine/internalencoderfactory.cc",
     "engine/internalencoderfactory.h",
-    "engine/multiplexcodecfactory.cc",
-    "engine/multiplexcodecfactory.h",
     "engine/scopedvideodecoder.cc",
     "engine/scopedvideodecoder.h",
     "engine/scopedvideoencoder.cc",
@@ -174,6 +172,8 @@ rtc_static_library("rtc_internal_video_codecs") {
     "engine/simulcast.h",
     "engine/simulcast_encoder_adapter.cc",
     "engine/simulcast_encoder_adapter.h",
+    "engine/stereocodecfactory.cc",
+    "engine/stereocodecfactory.h",
     "engine/videodecodersoftwarefallbackwrapper.cc",
     "engine/videodecodersoftwarefallbackwrapper.h",
     "engine/videoencodersoftwarefallbackwrapper.cc",
@@ -213,7 +213,7 @@ rtc_static_library("rtc_internal_video_codecs") {
     "../call:call_interfaces",
     "../call:video_stream_api",
     "../modules/video_coding:webrtc_h264",
-    "../modules/video_coding:webrtc_multiplex",
+    "../modules/video_coding:webrtc_stereo",
     "../modules/video_coding:webrtc_vp8",
     "../modules/video_coding:webrtc_vp8_helpers",
     "../modules/video_coding:webrtc_vp9",
@@ -530,11 +530,11 @@ if (rtc_include_tests) {
       "base/videoengine_unittest.h",
       "engine/apm_helpers_unittest.cc",
       "engine/internaldecoderfactory_unittest.cc",
-      "engine/multiplexcodecfactory_unittest.cc",
       "engine/nullwebrtcvideoengine_unittest.cc",
       "engine/payload_type_mapper_unittest.cc",
       "engine/simulcast_encoder_adapter_unittest.cc",
       "engine/simulcast_unittest.cc",
+      "engine/stereocodecfactory_unittest.cc",
       "engine/videodecodersoftwarefallbackwrapper_unittest.cc",
       "engine/videoencodersoftwarefallbackwrapper_unittest.cc",
       "engine/vp8_encoder_simulcast_proxy_unittest.cc",
diff --git a/media/base/mediaconstants.cc b/media/base/mediaconstants.cc
index e3a1d9b1d4..9496d9f60c 100644
--- a/media/base/mediaconstants.cc
+++ b/media/base/mediaconstants.cc
@@ -25,7 +25,7 @@ const float kProcessCpuThreshold = 0.10f;
 const char kRtxCodecName[] = "rtx";
 const char kRedCodecName[] = "red";
 const char kUlpfecCodecName[] = "ulpfec";
-const char kMultiplexCodecName[] = "multiplex";
+const char kStereoCodecName[] = "stereo";
 
 // TODO(brandtr): Change this to 'flexfec' when we are confident that the
 // header format is not changing anymore.
diff --git a/media/base/mediaconstants.h b/media/base/mediaconstants.h
index 73bbb8d247..58a66d917a 100644
--- a/media/base/mediaconstants.h
+++ b/media/base/mediaconstants.h
@@ -30,7 +30,7 @@ extern const char kRtxCodecName[];
 extern const char kRedCodecName[];
 extern const char kUlpfecCodecName[];
 extern const char kFlexfecCodecName[];
-extern const char kMultiplexCodecName[];
+extern const char kStereoCodecName[];
 
 extern const char kFlexfecFmtpRepairWindow[];
 
diff --git a/media/engine/multiplexcodecfactory.cc b/media/engine/multiplexcodecfactory.cc
deleted file mode 100644
index 23d34f9f28..0000000000
--- a/media/engine/multiplexcodecfactory.cc
+++ /dev/null
@@ -1,114 +0,0 @@
-/*
- *  Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#include "media/engine/multiplexcodecfactory.h"
-
-#include <utility>
-
-#include "api/video_codecs/sdp_video_format.h"
-#include "media/base/codec.h"
-#include "media/base/mediaconstants.h"
-#include "modules/video_coding/codecs/multiplex/include/multiplex_decoder_adapter.h"
-#include "modules/video_coding/codecs/multiplex/include/multiplex_encoder_adapter.h"
-#include "rtc_base/logging.h"
-
-namespace {
-
-bool IsMultiplexCodec(const cricket::VideoCodec& codec) {
-  return cricket::CodecNamesEq(codec.name.c_str(),
-                               cricket::kMultiplexCodecName);
-}
-
-}  // anonymous namespace
-
-namespace webrtc {
-
-constexpr const char* kMultiplexAssociatedCodecName = cricket::kVp9CodecName;
-
-MultiplexEncoderFactory::MultiplexEncoderFactory(
-    std::unique_ptr<VideoEncoderFactory> factory)
-    : factory_(std::move(factory)) {}
-
-std::vector<SdpVideoFormat> MultiplexEncoderFactory::GetSupportedFormats()
-    const {
-  std::vector<SdpVideoFormat> formats = factory_->GetSupportedFormats();
-  for (const auto& format : formats) {
-    if (cricket::CodecNamesEq(format.name, kMultiplexAssociatedCodecName)) {
-      SdpVideoFormat multiplex_format = format;
-      multiplex_format.parameters[cricket::kCodecParamAssociatedCodecName] =
-          format.name;
-      multiplex_format.name = cricket::kMultiplexCodecName;
-      formats.push_back(multiplex_format);
-      break;
-    }
-  }
-  return formats;
-}
-
-VideoEncoderFactory::CodecInfo MultiplexEncoderFactory::QueryVideoEncoder(
-    const SdpVideoFormat& format) const {
-  if (!IsMultiplexCodec(cricket::VideoCodec(format)))
-    return factory_->QueryVideoEncoder(format);
-  return factory_->QueryVideoEncoder(
-      SdpVideoFormat(kMultiplexAssociatedCodecName));
-}
-
-std::unique_ptr<VideoEncoder> MultiplexEncoderFactory::CreateVideoEncoder(
-    const SdpVideoFormat& format) {
-  if (!IsMultiplexCodec(cricket::VideoCodec(format)))
-    return factory_->CreateVideoEncoder(format);
-  const auto& it =
-      format.parameters.find(cricket::kCodecParamAssociatedCodecName);
-  if (it == format.parameters.end()) {
-    RTC_LOG(LS_ERROR) << "No assicated codec for multiplex.";
-    return nullptr;
-  }
-  SdpVideoFormat associated_format = format;
-  associated_format.name = it->second;
-  return std::unique_ptr<VideoEncoder>(
-      new MultiplexEncoderAdapter(factory_.get(), associated_format));
-}
-
-MultiplexDecoderFactory::MultiplexDecoderFactory(
-    std::unique_ptr<VideoDecoderFactory> factory)
-    : factory_(std::move(factory)) {}
-
-std::vector<SdpVideoFormat> MultiplexDecoderFactory::GetSupportedFormats()
-    const {
-  std::vector<SdpVideoFormat> formats = factory_->GetSupportedFormats();
-  for (const auto& format : formats) {
-    if (cricket::CodecNamesEq(format.name, kMultiplexAssociatedCodecName)) {
-      SdpVideoFormat multiplex_format = format;
-      multiplex_format.parameters[cricket::kCodecParamAssociatedCodecName] =
-          format.name;
-      multiplex_format.name = cricket::kMultiplexCodecName;
-      formats.push_back(multiplex_format);
-    }
-  }
-  return formats;
-}
-
-std::unique_ptr<VideoDecoder> MultiplexDecoderFactory::CreateVideoDecoder(
-    const SdpVideoFormat& format) {
-  if (!IsMultiplexCodec(cricket::VideoCodec(format)))
-    return factory_->CreateVideoDecoder(format);
-  const auto& it =
-      format.parameters.find(cricket::kCodecParamAssociatedCodecName);
-  if (it == format.parameters.end()) {
-    RTC_LOG(LS_ERROR) << "No assicated codec for multiplex.";
-    return nullptr;
-  }
-  SdpVideoFormat associated_format = format;
-  associated_format.name = it->second;
-  return std::unique_ptr<VideoDecoder>(
-      new MultiplexDecoderAdapter(factory_.get(), associated_format));
-}
-
-}  // namespace webrtc
diff --git a/media/engine/stereocodecfactory.cc b/media/engine/stereocodecfactory.cc
new file mode 100644
index 0000000000..5ffb0c406d
--- /dev/null
+++ b/media/engine/stereocodecfactory.cc
@@ -0,0 +1,111 @@
+/*
+ *  Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "media/engine/stereocodecfactory.h"
+
+#include <utility>
+
+#include "api/video_codecs/sdp_video_format.h"
+#include "media/base/codec.h"
+#include "media/base/mediaconstants.h"
+#include "modules/video_coding/codecs/stereo/include/stereo_decoder_adapter.h"
+#include "modules/video_coding/codecs/stereo/include/stereo_encoder_adapter.h"
+#include "rtc_base/logging.h"
+
+namespace {
+
+bool IsStereoCodec(const cricket::VideoCodec& codec) {
+  return cricket::CodecNamesEq(codec.name.c_str(), cricket::kStereoCodecName);
+}
+
+}  // anonymous namespace
+
+namespace webrtc {
+
+constexpr const char* kStereoAssociatedCodecName = cricket::kVp9CodecName;
+
+StereoEncoderFactory::StereoEncoderFactory(
+    std::unique_ptr<VideoEncoderFactory> factory)
+    : factory_(std::move(factory)) {}
+
+std::vector<SdpVideoFormat> StereoEncoderFactory::GetSupportedFormats() const {
+  std::vector<SdpVideoFormat> formats = factory_->GetSupportedFormats();
+  for (const auto& format : formats) {
+    if (cricket::CodecNamesEq(format.name, kStereoAssociatedCodecName)) {
+      SdpVideoFormat stereo_format = format;
+      stereo_format.parameters[cricket::kCodecParamAssociatedCodecName] =
+          format.name;
+      stereo_format.name = cricket::kStereoCodecName;
+      formats.push_back(stereo_format);
+      break;
+    }
+  }
+  return formats;
+}
+
+VideoEncoderFactory::CodecInfo StereoEncoderFactory::QueryVideoEncoder(
+    const SdpVideoFormat& format) const {
+  if (!IsStereoCodec(cricket::VideoCodec(format)))
+    return factory_->QueryVideoEncoder(format);
+  return factory_->QueryVideoEncoder(
+      SdpVideoFormat(kStereoAssociatedCodecName));
+}
+
+std::unique_ptr<VideoEncoder> StereoEncoderFactory::CreateVideoEncoder(
+    const SdpVideoFormat& format) {
+  if (!IsStereoCodec(cricket::VideoCodec(format)))
+    return factory_->CreateVideoEncoder(format);
+  const auto& it =
+      format.parameters.find(cricket::kCodecParamAssociatedCodecName);
+  if (it == format.parameters.end()) {
+    RTC_LOG(LS_ERROR) << "No assicated codec for stereo.";
+    return nullptr;
+  }
+  SdpVideoFormat associated_format = format;
+  associated_format.name = it->second;
+  return std::unique_ptr<VideoEncoder>(
+      new StereoEncoderAdapter(factory_.get(), associated_format));
+}
+
+StereoDecoderFactory::StereoDecoderFactory(
+    std::unique_ptr<VideoDecoderFactory> factory)
+    : factory_(std::move(factory)) {}
+
+std::vector<SdpVideoFormat> StereoDecoderFactory::GetSupportedFormats() const {
+  std::vector<SdpVideoFormat> formats = factory_->GetSupportedFormats();
+  for (const auto& format : formats) {
+    if (cricket::CodecNamesEq(format.name, kStereoAssociatedCodecName)) {
+      SdpVideoFormat stereo_format = format;
+      stereo_format.parameters[cricket::kCodecParamAssociatedCodecName] =
+          format.name;
+      stereo_format.name = cricket::kStereoCodecName;
+      formats.push_back(stereo_format);
+    }
+  }
+  return formats;
+}
+
+std::unique_ptr<VideoDecoder> StereoDecoderFactory::CreateVideoDecoder(
+    const SdpVideoFormat& format) {
+  if (!IsStereoCodec(cricket::VideoCodec(format)))
+    return factory_->CreateVideoDecoder(format);
+  const auto& it =
+      format.parameters.find(cricket::kCodecParamAssociatedCodecName);
+  if (it == format.parameters.end()) {
+    RTC_LOG(LS_ERROR) << "No assicated codec for stereo.";
+    return nullptr;
+  }
+  SdpVideoFormat associated_format = format;
+  associated_format.name = it->second;
+  return std::unique_ptr<VideoDecoder>(
+      new StereoDecoderAdapter(factory_.get(), associated_format));
+}
+
+}  // namespace webrtc
diff --git a/media/engine/multiplexcodecfactory.h b/media/engine/stereocodecfactory.h
similarity index 72%
rename from media/engine/multiplexcodecfactory.h
rename to media/engine/stereocodecfactory.h
index c622af555e..468d2faf0b 100644
--- a/media/engine/multiplexcodecfactory.h
+++ b/media/engine/stereocodecfactory.h
@@ -8,8 +8,8 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#ifndef MEDIA_ENGINE_MULTIPLEXCODECFACTORY_H_
-#define MEDIA_ENGINE_MULTIPLEXCODECFACTORY_H_
+#ifndef MEDIA_ENGINE_STEREOCODECFACTORY_H_
+#define MEDIA_ENGINE_STEREOCODECFACTORY_H_
 
 #include <memory>
 #include <vector>
@@ -19,10 +19,9 @@
 
 namespace webrtc {
 
-class MultiplexEncoderFactory : public VideoEncoderFactory {
+class StereoEncoderFactory : public VideoEncoderFactory {
  public:
-  explicit MultiplexEncoderFactory(
-      std::unique_ptr<VideoEncoderFactory> factory);
+  explicit StereoEncoderFactory(std::unique_ptr<VideoEncoderFactory> factory);
 
   std::vector<SdpVideoFormat> GetSupportedFormats() const override;
   CodecInfo QueryVideoEncoder(const SdpVideoFormat& format) const override;
@@ -33,10 +32,9 @@ class MultiplexEncoderFactory : public VideoEncoderFactory {
   std::unique_ptr<VideoEncoderFactory> factory_;
 };
 
-class MultiplexDecoderFactory : public VideoDecoderFactory {
+class StereoDecoderFactory : public VideoDecoderFactory {
  public:
-  explicit MultiplexDecoderFactory(
-      std::unique_ptr<VideoDecoderFactory> factory);
+  explicit StereoDecoderFactory(std::unique_ptr<VideoDecoderFactory> factory);
 
   std::vector<SdpVideoFormat> GetSupportedFormats() const override;
   std::unique_ptr<VideoDecoder> CreateVideoDecoder(
@@ -48,4 +46,4 @@ class MultiplexDecoderFactory : public VideoDecoderFactory {
 
 }  // namespace webrtc
 
-#endif  // MEDIA_ENGINE_MULTIPLEXCODECFACTORY_H_
+#endif  // MEDIA_ENGINE_STEREOCODECFACTORY_H_
diff --git a/media/engine/multiplexcodecfactory_unittest.cc b/media/engine/stereocodecfactory_unittest.cc
similarity index 79%
rename from media/engine/multiplexcodecfactory_unittest.cc
rename to media/engine/stereocodecfactory_unittest.cc
index bc30f60c6d..a86eff04ac 100644
--- a/media/engine/multiplexcodecfactory_unittest.cc
+++ b/media/engine/stereocodecfactory_unittest.cc
@@ -8,7 +8,7 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "media/engine/multiplexcodecfactory.h"
+#include "media/engine/stereocodecfactory.h"
 
 #include <utility>
 
@@ -22,24 +22,24 @@
 
 namespace webrtc {
 
-TEST(MultiplexDecoderFactory, CreateVideoDecoder) {
+TEST(StereoDecoderFactory, CreateVideoDecoder) {
   std::unique_ptr<VideoDecoderFactory> internal_factory(
       new InternalDecoderFactory());
-  MultiplexDecoderFactory factory(std::move(internal_factory));
+  StereoDecoderFactory factory(std::move(internal_factory));
   std::unique_ptr<VideoDecoder> decoder =
       factory.CreateVideoDecoder(SdpVideoFormat(
-          cricket::kMultiplexCodecName,
+          cricket::kStereoCodecName,
           {{cricket::kCodecParamAssociatedCodecName, cricket::kVp9CodecName}}));
   EXPECT_TRUE(decoder);
 }
 
-TEST(MultiplexEncoderFactory, CreateVideoEncoder) {
+TEST(StereoEncoderFactory, CreateVideoEncoder) {
   std::unique_ptr<VideoEncoderFactory> internal_factory(
       new InternalEncoderFactory());
-  MultiplexEncoderFactory factory(std::move(internal_factory));
+  StereoEncoderFactory factory(std::move(internal_factory));
   std::unique_ptr<VideoEncoder> encoder =
       factory.CreateVideoEncoder(SdpVideoFormat(
-          cricket::kMultiplexCodecName,
+          cricket::kStereoCodecName,
           {{cricket::kCodecParamAssociatedCodecName, cricket::kVp9CodecName}}));
   EXPECT_TRUE(encoder);
 }
diff --git a/modules/rtp_rtcp/source/rtp_payload_registry.cc b/modules/rtp_rtcp/source/rtp_payload_registry.cc
index 6cb9c868cb..631ffae35c 100644
--- a/modules/rtp_rtcp/source/rtp_payload_registry.cc
+++ b/modules/rtp_rtcp/source/rtp_payload_registry.cc
@@ -61,7 +61,7 @@ RtpVideoCodecTypes ConvertToRtpVideoCodecType(VideoCodecType type) {
     case kVideoCodecI420:
     case kVideoCodecFlexfec:
     case kVideoCodecGeneric:
-    case kVideoCodecMultiplex:
+    case kVideoCodecStereo:
     case kVideoCodecUnknown:
       return kRtpVideoGeneric;
   }
diff --git a/modules/video_coding/BUILD.gn b/modules/video_coding/BUILD.gn
index a3e1c451d3..05aa63469b 100644
--- a/modules/video_coding/BUILD.gn
+++ b/modules/video_coding/BUILD.gn
@@ -94,7 +94,7 @@ rtc_static_library("video_coding") {
     ":video_coding_utility",
     ":webrtc_h264",
     ":webrtc_i420",
-    ":webrtc_multiplex",
+    ":webrtc_stereo",
     ":webrtc_vp8",
     ":webrtc_vp8_helpers",
     ":webrtc_vp9",
@@ -289,14 +289,14 @@ rtc_static_library("webrtc_i420") {
   ]
 }
 
-rtc_static_library("webrtc_multiplex") {
+rtc_static_library("webrtc_stereo") {
   sources = [
-    "codecs/multiplex/include/multiplex_decoder_adapter.h",
-    "codecs/multiplex/include/multiplex_encoded_image_packer.h",
-    "codecs/multiplex/include/multiplex_encoder_adapter.h",
-    "codecs/multiplex/multiplex_decoder_adapter.cc",
-    "codecs/multiplex/multiplex_encoded_image_packer.cc",
-    "codecs/multiplex/multiplex_encoder_adapter.cc",
+    "codecs/stereo/include/multiplex_encoded_image_packer.h",
+    "codecs/stereo/include/stereo_decoder_adapter.h",
+    "codecs/stereo/include/stereo_encoder_adapter.h",
+    "codecs/stereo/multiplex_encoded_image_packer.cc",
+    "codecs/stereo/stereo_decoder_adapter.cc",
+    "codecs/stereo/stereo_encoder_adapter.cc",
   ]
 
   if (!build_with_chromium && is_clang) {
@@ -545,7 +545,7 @@ if (rtc_include_tests) {
 
     sources = [
       "codecs/h264/test/h264_impl_unittest.cc",
-      "codecs/multiplex/test/multiplex_adapter_unittest.cc",
+      "codecs/stereo/test/stereo_adapter_unittest.cc",
       "codecs/test/videoprocessor_integrationtest.cc",
       "codecs/test/videoprocessor_integrationtest.h",
       "codecs/test/videoprocessor_integrationtest_libvpx.cc",
@@ -561,7 +561,7 @@ if (rtc_include_tests) {
       ":video_coding",
       ":video_coding_utility",
       ":webrtc_h264",
-      ":webrtc_multiplex",
+      ":webrtc_stereo",
       ":webrtc_vp8",
       ":webrtc_vp8_helpers",
       ":webrtc_vp9",
diff --git a/modules/video_coding/codec_database.cc b/modules/video_coding/codec_database.cc
index 0108019b56..e300ad3d07 100644
--- a/modules/video_coding/codec_database.cc
+++ b/modules/video_coding/codec_database.cc
@@ -254,7 +254,7 @@ bool VCMCodecDataBase::RequiresEncoderReset(const VideoCodec& new_send_codec) {
     case kVideoCodecRED:
     case kVideoCodecULPFEC:
     case kVideoCodecFlexfec:
-    case kVideoCodecMultiplex:
+    case kVideoCodecStereo:
       break;
     // Unknown codec type, reset just to be sure.
     case kVideoCodecUnknown:
diff --git a/modules/video_coding/codecs/multiplex/OWNERS b/modules/video_coding/codecs/stereo/OWNERS
similarity index 100%
rename from modules/video_coding/codecs/multiplex/OWNERS
rename to modules/video_coding/codecs/stereo/OWNERS
diff --git a/modules/video_coding/codecs/multiplex/include/multiplex_encoded_image_packer.h b/modules/video_coding/codecs/stereo/include/multiplex_encoded_image_packer.h
similarity index 93%
rename from modules/video_coding/codecs/multiplex/include/multiplex_encoded_image_packer.h
rename to modules/video_coding/codecs/stereo/include/multiplex_encoded_image_packer.h
index a84c52d8f1..f7557babc1 100644
--- a/modules/video_coding/codecs/multiplex/include/multiplex_encoded_image_packer.h
+++ b/modules/video_coding/codecs/stereo/include/multiplex_encoded_image_packer.h
@@ -8,8 +8,8 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#ifndef MODULES_VIDEO_CODING_CODECS_MULTIPLEX_INCLUDE_MULTIPLEX_ENCODED_IMAGE_PACKER_H_
-#define MODULES_VIDEO_CODING_CODECS_MULTIPLEX_INCLUDE_MULTIPLEX_ENCODED_IMAGE_PACKER_H_
+#ifndef MODULES_VIDEO_CODING_CODECS_STEREO_INCLUDE_MULTIPLEX_ENCODED_IMAGE_PACKER_H_
+#define MODULES_VIDEO_CODING_CODECS_STEREO_INCLUDE_MULTIPLEX_ENCODED_IMAGE_PACKER_H_
 
 #include <vector>
 
@@ -103,4 +103,4 @@ class MultiplexEncodedImagePacker {
 
 }  // namespace webrtc
 
-#endif  // MODULES_VIDEO_CODING_CODECS_MULTIPLEX_INCLUDE_MULTIPLEX_ENCODED_IMAGE_PACKER_H_
+#endif  // MODULES_VIDEO_CODING_CODECS_STEREO_INCLUDE_MULTIPLEX_ENCODED_IMAGE_PACKER_H_
diff --git a/modules/video_coding/codecs/multiplex/include/multiplex_decoder_adapter.h b/modules/video_coding/codecs/stereo/include/stereo_decoder_adapter.h
similarity index 74%
rename from modules/video_coding/codecs/multiplex/include/multiplex_decoder_adapter.h
rename to modules/video_coding/codecs/stereo/include/stereo_decoder_adapter.h
index 95d5783fac..c6237eece4 100644
--- a/modules/video_coding/codecs/multiplex/include/multiplex_decoder_adapter.h
+++ b/modules/video_coding/codecs/stereo/include/stereo_decoder_adapter.h
@@ -8,8 +8,8 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#ifndef MODULES_VIDEO_CODING_CODECS_MULTIPLEX_INCLUDE_MULTIPLEX_DECODER_ADAPTER_H_
-#define MODULES_VIDEO_CODING_CODECS_MULTIPLEX_INCLUDE_MULTIPLEX_DECODER_ADAPTER_H_
+#ifndef MODULES_VIDEO_CODING_CODECS_STEREO_INCLUDE_STEREO_DECODER_ADAPTER_H_
+#define MODULES_VIDEO_CODING_CODECS_STEREO_INCLUDE_STEREO_DECODER_ADAPTER_H_
 
 #include <map>
 #include <memory>
@@ -18,16 +18,16 @@
 #include "api/video_codecs/sdp_video_format.h"
 #include "api/video_codecs/video_decoder.h"
 #include "api/video_codecs/video_decoder_factory.h"
-#include "modules/video_coding/codecs/multiplex/include/multiplex_encoder_adapter.h"
+#include "modules/video_coding/codecs/stereo/include/stereo_encoder_adapter.h"
 
 namespace webrtc {
 
-class MultiplexDecoderAdapter : public VideoDecoder {
+class StereoDecoderAdapter : public VideoDecoder {
  public:
   // |factory| is not owned and expected to outlive this class' lifetime.
-  explicit MultiplexDecoderAdapter(VideoDecoderFactory* factory,
-                                   const SdpVideoFormat& associated_format);
-  virtual ~MultiplexDecoderAdapter();
+  explicit StereoDecoderAdapter(VideoDecoderFactory* factory,
+                                const SdpVideoFormat& associated_format);
+  virtual ~StereoDecoderAdapter();
 
   // Implements VideoDecoder
   int32_t InitDecode(const VideoCodec* codec_settings,
@@ -56,9 +56,9 @@ class MultiplexDecoderAdapter : public VideoDecoder {
   void MergeAlphaImages(VideoFrame* decoded_image,
                         const rtc::Optional<int32_t>& decode_time_ms,
                         const rtc::Optional<uint8_t>& qp,
-                        VideoFrame* multiplex_decoded_image,
-                        const rtc::Optional<int32_t>& multiplex_decode_time_ms,
-                        const rtc::Optional<uint8_t>& multiplex_qp);
+                        VideoFrame* stereo_decoded_image,
+                        const rtc::Optional<int32_t>& stereo_decode_time_ms,
+                        const rtc::Optional<uint8_t>& stereo_qp);
 
   VideoDecoderFactory* const factory_;
   const SdpVideoFormat associated_format_;
@@ -72,4 +72,4 @@ class MultiplexDecoderAdapter : public VideoDecoder {
 
 }  // namespace webrtc
 
-#endif  // MODULES_VIDEO_CODING_CODECS_MULTIPLEX_INCLUDE_MULTIPLEX_DECODER_ADAPTER_H_
+#endif  // MODULES_VIDEO_CODING_CODECS_STEREO_INCLUDE_STEREO_DECODER_ADAPTER_H_
diff --git a/modules/video_coding/codecs/multiplex/include/multiplex_encoder_adapter.h b/modules/video_coding/codecs/stereo/include/stereo_encoder_adapter.h
similarity index 78%
rename from modules/video_coding/codecs/multiplex/include/multiplex_encoder_adapter.h
rename to modules/video_coding/codecs/stereo/include/stereo_encoder_adapter.h
index 7488f206da..544a21868e 100644
--- a/modules/video_coding/codecs/multiplex/include/multiplex_encoder_adapter.h
+++ b/modules/video_coding/codecs/stereo/include/stereo_encoder_adapter.h
@@ -8,8 +8,8 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#ifndef MODULES_VIDEO_CODING_CODECS_MULTIPLEX_INCLUDE_MULTIPLEX_ENCODER_ADAPTER_H_
-#define MODULES_VIDEO_CODING_CODECS_MULTIPLEX_INCLUDE_MULTIPLEX_ENCODER_ADAPTER_H_
+#ifndef MODULES_VIDEO_CODING_CODECS_STEREO_INCLUDE_STEREO_ENCODER_ADAPTER_H_
+#define MODULES_VIDEO_CODING_CODECS_STEREO_INCLUDE_STEREO_ENCODER_ADAPTER_H_
 
 #include <map>
 #include <memory>
@@ -18,7 +18,7 @@
 #include "api/video_codecs/sdp_video_format.h"
 #include "api/video_codecs/video_encoder.h"
 #include "api/video_codecs/video_encoder_factory.h"
-#include "modules/video_coding/codecs/multiplex/include/multiplex_encoded_image_packer.h"
+#include "modules/video_coding/codecs/stereo/include/multiplex_encoded_image_packer.h"
 #include "modules/video_coding/include/video_codec_interface.h"
 
 namespace webrtc {
@@ -29,12 +29,12 @@ enum AlphaCodecStream {
   kAlphaCodecStreams = 2,
 };
 
-class MultiplexEncoderAdapter : public VideoEncoder {
+class StereoEncoderAdapter : public VideoEncoder {
  public:
   // |factory| is not owned and expected to outlive this class' lifetime.
-  explicit MultiplexEncoderAdapter(VideoEncoderFactory* factory,
-                                   const SdpVideoFormat& associated_format);
-  virtual ~MultiplexEncoderAdapter();
+  explicit StereoEncoderAdapter(VideoEncoderFactory* factory,
+                                const SdpVideoFormat& associated_format);
+  virtual ~StereoEncoderAdapter();
 
   // Implements VideoEncoder
   int InitEncode(const VideoCodec* inst,
@@ -69,7 +69,7 @@ class MultiplexEncoderAdapter : public VideoEncoder {
   std::map<uint32_t /* timestamp */, MultiplexImage> stashed_images_;
 
   uint16_t picture_index_ = 0;
-  std::vector<uint8_t> multiplex_dummy_planes_;
+  std::vector<uint8_t> stereo_dummy_planes_;
 
   int key_frame_interval_;
   EncodedImage combined_image_;
@@ -77,4 +77,4 @@ class MultiplexEncoderAdapter : public VideoEncoder {
 
 }  // namespace webrtc
 
-#endif  // MODULES_VIDEO_CODING_CODECS_MULTIPLEX_INCLUDE_MULTIPLEX_ENCODER_ADAPTER_H_
+#endif  // MODULES_VIDEO_CODING_CODECS_STEREO_INCLUDE_STEREO_ENCODER_ADAPTER_H_
diff --git a/modules/video_coding/codecs/multiplex/multiplex_encoded_image_packer.cc b/modules/video_coding/codecs/stereo/multiplex_encoded_image_packer.cc
similarity index 98%
rename from modules/video_coding/codecs/multiplex/multiplex_encoded_image_packer.cc
rename to modules/video_coding/codecs/stereo/multiplex_encoded_image_packer.cc
index 6e02a6534b..6a33bb1995 100644
--- a/modules/video_coding/codecs/multiplex/multiplex_encoded_image_packer.cc
+++ b/modules/video_coding/codecs/stereo/multiplex_encoded_image_packer.cc
@@ -8,7 +8,7 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "modules/video_coding/codecs/multiplex/include/multiplex_encoded_image_packer.h"
+#include "modules/video_coding/codecs/stereo/include/multiplex_encoded_image_packer.h"
 
 #include <cstring>
 
diff --git a/modules/video_coding/codecs/multiplex/multiplex_decoder_adapter.cc b/modules/video_coding/codecs/stereo/stereo_decoder_adapter.cc
similarity index 86%
rename from modules/video_coding/codecs/multiplex/multiplex_decoder_adapter.cc
rename to modules/video_coding/codecs/stereo/stereo_decoder_adapter.cc
index 899dceeba6..59fcc50eb4 100644
--- a/modules/video_coding/codecs/multiplex/multiplex_decoder_adapter.cc
+++ b/modules/video_coding/codecs/stereo/stereo_decoder_adapter.cc
@@ -8,7 +8,7 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "modules/video_coding/codecs/multiplex/include/multiplex_decoder_adapter.h"
+#include "modules/video_coding/codecs/stereo/include/stereo_decoder_adapter.h"
 
 #include "api/video/i420_buffer.h"
 #include "api/video/video_frame_buffer.h"
@@ -25,10 +25,10 @@ void KeepBufferRefs(rtc::scoped_refptr<webrtc::VideoFrameBuffer>,
 
 namespace webrtc {
 
-class MultiplexDecoderAdapter::AdapterDecodedImageCallback
+class StereoDecoderAdapter::AdapterDecodedImageCallback
     : public webrtc::DecodedImageCallback {
  public:
-  AdapterDecodedImageCallback(webrtc::MultiplexDecoderAdapter* adapter,
+  AdapterDecodedImageCallback(webrtc::StereoDecoderAdapter* adapter,
                               AlphaCodecStream stream_idx)
       : adapter_(adapter), stream_idx_(stream_idx) {}
 
@@ -49,11 +49,11 @@ class MultiplexDecoderAdapter::AdapterDecodedImageCallback
   }
 
  private:
-  MultiplexDecoderAdapter* adapter_;
+  StereoDecoderAdapter* adapter_;
   const AlphaCodecStream stream_idx_;
 };
 
-struct MultiplexDecoderAdapter::DecodedImageData {
+struct StereoDecoderAdapter::DecodedImageData {
   explicit DecodedImageData(AlphaCodecStream stream_idx)
       : stream_idx_(stream_idx),
         decoded_image_(I420Buffer::Create(1 /* width */, 1 /* height */),
@@ -79,18 +79,18 @@ struct MultiplexDecoderAdapter::DecodedImageData {
   RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(DecodedImageData);
 };
 
-MultiplexDecoderAdapter::MultiplexDecoderAdapter(
+StereoDecoderAdapter::StereoDecoderAdapter(
     VideoDecoderFactory* factory,
     const SdpVideoFormat& associated_format)
     : factory_(factory), associated_format_(associated_format) {}
 
-MultiplexDecoderAdapter::~MultiplexDecoderAdapter() {
+StereoDecoderAdapter::~StereoDecoderAdapter() {
   Release();
 }
 
-int32_t MultiplexDecoderAdapter::InitDecode(const VideoCodec* codec_settings,
-                                            int32_t number_of_cores) {
-  RTC_DCHECK_EQ(kVideoCodecMultiplex, codec_settings->codecType);
+int32_t StereoDecoderAdapter::InitDecode(const VideoCodec* codec_settings,
+                                         int32_t number_of_cores) {
+  RTC_DCHECK_EQ(kVideoCodecStereo, codec_settings->codecType);
   VideoCodec settings = *codec_settings;
   settings.codecType = PayloadStringToCodecType(associated_format_.name);
   for (size_t i = 0; i < kAlphaCodecStreams; ++i) {
@@ -100,7 +100,7 @@ int32_t MultiplexDecoderAdapter::InitDecode(const VideoCodec* codec_settings,
     if (rv)
       return rv;
     adapter_callbacks_.emplace_back(
-        new MultiplexDecoderAdapter::AdapterDecodedImageCallback(
+        new StereoDecoderAdapter::AdapterDecodedImageCallback(
             this, static_cast<AlphaCodecStream>(i)));
     decoder->RegisterDecodeCompleteCallback(adapter_callbacks_.back().get());
     decoders_.emplace_back(std::move(decoder));
@@ -108,7 +108,7 @@ int32_t MultiplexDecoderAdapter::InitDecode(const VideoCodec* codec_settings,
   return WEBRTC_VIDEO_CODEC_OK;
 }
 
-int32_t MultiplexDecoderAdapter::Decode(
+int32_t StereoDecoderAdapter::Decode(
     const EncodedImage& input_image,
     bool missing_frames,
     const RTPFragmentationHeader* /*fragmentation*/,
@@ -135,13 +135,13 @@ int32_t MultiplexDecoderAdapter::Decode(
   return rv;
 }
 
-int32_t MultiplexDecoderAdapter::RegisterDecodeCompleteCallback(
+int32_t StereoDecoderAdapter::RegisterDecodeCompleteCallback(
     DecodedImageCallback* callback) {
   decoded_complete_callback_ = callback;
   return WEBRTC_VIDEO_CODEC_OK;
 }
 
-int32_t MultiplexDecoderAdapter::Release() {
+int32_t StereoDecoderAdapter::Release() {
   for (auto& decoder : decoders_) {
     const int32_t rv = decoder->Release();
     if (rv)
@@ -152,10 +152,10 @@ int32_t MultiplexDecoderAdapter::Release() {
   return WEBRTC_VIDEO_CODEC_OK;
 }
 
-void MultiplexDecoderAdapter::Decoded(AlphaCodecStream stream_idx,
-                                      VideoFrame* decoded_image,
-                                      rtc::Optional<int32_t> decode_time_ms,
-                                      rtc::Optional<uint8_t> qp) {
+void StereoDecoderAdapter::Decoded(AlphaCodecStream stream_idx,
+                                   VideoFrame* decoded_image,
+                                   rtc::Optional<int32_t> decode_time_ms,
+                                   rtc::Optional<uint8_t> qp) {
   const auto& other_decoded_data_it =
       decoded_data_.find(decoded_image->timestamp());
   if (other_decoded_data_it != decoded_data_.end()) {
@@ -183,7 +183,7 @@ void MultiplexDecoderAdapter::Decoded(AlphaCodecStream stream_idx,
       std::forward_as_tuple(stream_idx, *decoded_image, decode_time_ms, qp));
 }
 
-void MultiplexDecoderAdapter::MergeAlphaImages(
+void StereoDecoderAdapter::MergeAlphaImages(
     VideoFrame* decoded_image,
     const rtc::Optional<int32_t>& decode_time_ms,
     const rtc::Optional<uint8_t>& qp,
diff --git a/modules/video_coding/codecs/multiplex/multiplex_encoder_adapter.cc b/modules/video_coding/codecs/stereo/stereo_encoder_adapter.cc
similarity index 82%
rename from modules/video_coding/codecs/multiplex/multiplex_encoder_adapter.cc
rename to modules/video_coding/codecs/stereo/stereo_encoder_adapter.cc
index 2754b39844..3c1cc5308f 100644
--- a/modules/video_coding/codecs/multiplex/multiplex_encoder_adapter.cc
+++ b/modules/video_coding/codecs/stereo/stereo_encoder_adapter.cc
@@ -8,7 +8,7 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "modules/video_coding/codecs/multiplex/include/multiplex_encoder_adapter.h"
+#include "modules/video_coding/codecs/stereo/include/stereo_encoder_adapter.h"
 
 #include <cstring>
 
@@ -23,10 +23,10 @@ namespace webrtc {
 
 // Callback wrapper that helps distinguish returned results from |encoders_|
 // instances.
-class MultiplexEncoderAdapter::AdapterEncodedImageCallback
+class StereoEncoderAdapter::AdapterEncodedImageCallback
     : public webrtc::EncodedImageCallback {
  public:
-  AdapterEncodedImageCallback(webrtc::MultiplexEncoderAdapter* adapter,
+  AdapterEncodedImageCallback(webrtc::StereoEncoderAdapter* adapter,
                               AlphaCodecStream stream_idx)
       : adapter_(adapter), stream_idx_(stream_idx) {}
 
@@ -41,32 +41,31 @@ class MultiplexEncoderAdapter::AdapterEncodedImageCallback
   }
 
  private:
-  MultiplexEncoderAdapter* adapter_;
+  StereoEncoderAdapter* adapter_;
   const AlphaCodecStream stream_idx_;
 };
 
-MultiplexEncoderAdapter::MultiplexEncoderAdapter(
+StereoEncoderAdapter::StereoEncoderAdapter(
     VideoEncoderFactory* factory,
     const SdpVideoFormat& associated_format)
     : factory_(factory),
       associated_format_(associated_format),
       encoded_complete_callback_(nullptr) {}
 
-MultiplexEncoderAdapter::~MultiplexEncoderAdapter() {
+StereoEncoderAdapter::~StereoEncoderAdapter() {
   Release();
 }
 
-int MultiplexEncoderAdapter::InitEncode(const VideoCodec* inst,
-                                        int number_of_cores,
-                                        size_t max_payload_size) {
+int StereoEncoderAdapter::InitEncode(const VideoCodec* inst,
+                                     int number_of_cores,
+                                     size_t max_payload_size) {
   const size_t buffer_size =
       CalcBufferSize(VideoType::kI420, inst->width, inst->height);
-  multiplex_dummy_planes_.resize(buffer_size);
+  stereo_dummy_planes_.resize(buffer_size);
   // It is more expensive to encode 0x00, so use 0x80 instead.
-  std::fill(multiplex_dummy_planes_.begin(), multiplex_dummy_planes_.end(),
-            0x80);
+  std::fill(stereo_dummy_planes_.begin(), stereo_dummy_planes_.end(), 0x80);
 
-  RTC_DCHECK_EQ(kVideoCodecMultiplex, inst->codecType);
+  RTC_DCHECK_EQ(kVideoCodecStereo, inst->codecType);
   VideoCodec settings = *inst;
   settings.codecType = PayloadStringToCodecType(associated_format_.name);
 
@@ -95,7 +94,7 @@ int MultiplexEncoderAdapter::InitEncode(const VideoCodec* inst,
     const int rv =
         encoder->InitEncode(&settings, number_of_cores, max_payload_size);
     if (rv) {
-      RTC_LOG(LS_ERROR) << "Failed to create multiplex codec index " << i;
+      RTC_LOG(LS_ERROR) << "Failed to create stereo codec index " << i;
       return rv;
     }
     adapter_callbacks_.emplace_back(new AdapterEncodedImageCallback(
@@ -106,10 +105,9 @@ int MultiplexEncoderAdapter::InitEncode(const VideoCodec* inst,
   return WEBRTC_VIDEO_CODEC_OK;
 }
 
-int MultiplexEncoderAdapter::Encode(
-    const VideoFrame& input_image,
-    const CodecSpecificInfo* codec_specific_info,
-    const std::vector<FrameType>* frame_types) {
+int StereoEncoderAdapter::Encode(const VideoFrame& input_image,
+                                 const CodecSpecificInfo* codec_specific_info,
+                                 const std::vector<FrameType>* frame_types) {
   if (!encoded_complete_callback_) {
     return WEBRTC_VIDEO_CODEC_UNINITIALIZED;
   }
@@ -144,8 +142,8 @@ int MultiplexEncoderAdapter::Encode(
   rtc::scoped_refptr<I420BufferInterface> alpha_buffer =
       WrapI420Buffer(input_image.width(), input_image.height(),
                      yuva_buffer->DataA(), yuva_buffer->StrideA(),
-                     multiplex_dummy_planes_.data(), yuva_buffer->StrideU(),
-                     multiplex_dummy_planes_.data(), yuva_buffer->StrideV(),
+                     stereo_dummy_planes_.data(), yuva_buffer->StrideU(),
+                     stereo_dummy_planes_.data(), yuva_buffer->StrideV(),
                      rtc::KeepRefUntilDone(input_image.video_frame_buffer()));
   VideoFrame alpha_image(alpha_buffer, input_image.timestamp(),
                          input_image.render_time_ms(), input_image.rotation());
@@ -154,14 +152,14 @@ int MultiplexEncoderAdapter::Encode(
   return rv;
 }
 
-int MultiplexEncoderAdapter::RegisterEncodeCompleteCallback(
+int StereoEncoderAdapter::RegisterEncodeCompleteCallback(
     EncodedImageCallback* callback) {
   encoded_complete_callback_ = callback;
   return WEBRTC_VIDEO_CODEC_OK;
 }
 
-int MultiplexEncoderAdapter::SetChannelParameters(uint32_t packet_loss,
-                                                  int64_t rtt) {
+int StereoEncoderAdapter::SetChannelParameters(uint32_t packet_loss,
+                                               int64_t rtt) {
   for (auto& encoder : encoders_) {
     const int rv = encoder->SetChannelParameters(packet_loss, rtt);
     if (rv)
@@ -170,8 +168,8 @@ int MultiplexEncoderAdapter::SetChannelParameters(uint32_t packet_loss,
   return WEBRTC_VIDEO_CODEC_OK;
 }
 
-int MultiplexEncoderAdapter::SetRateAllocation(const BitrateAllocation& bitrate,
-                                               uint32_t framerate) {
+int StereoEncoderAdapter::SetRateAllocation(const BitrateAllocation& bitrate,
+                                            uint32_t framerate) {
   for (auto& encoder : encoders_) {
     // TODO(emircan): |framerate| is used to calculate duration in encoder
     // instances. We report the total frame rate to keep real time for now.
@@ -184,7 +182,7 @@ int MultiplexEncoderAdapter::SetRateAllocation(const BitrateAllocation& bitrate,
   return WEBRTC_VIDEO_CODEC_OK;
 }
 
-int MultiplexEncoderAdapter::Release() {
+int StereoEncoderAdapter::Release() {
   for (auto& encoder : encoders_) {
     const int rv = encoder->Release();
     if (rv)
@@ -205,11 +203,11 @@ int MultiplexEncoderAdapter::Release() {
   return WEBRTC_VIDEO_CODEC_OK;
 }
 
-const char* MultiplexEncoderAdapter::ImplementationName() const {
-  return "MultiplexEncoderAdapter";
+const char* StereoEncoderAdapter::ImplementationName() const {
+  return "StereoEncoderAdapter";
 }
 
-EncodedImageCallback::Result MultiplexEncoderAdapter::OnEncodedImage(
+EncodedImageCallback::Result StereoEncoderAdapter::OnEncodedImage(
     AlphaCodecStream stream_idx,
     const EncodedImage& encodedImage,
     const CodecSpecificInfo* codecSpecificInfo,
@@ -248,7 +246,7 @@ EncodedImageCallback::Result MultiplexEncoderAdapter::OnEncodedImage(
           MultiplexEncodedImagePacker::PackAndRelease(iter->second);
 
       CodecSpecificInfo codec_info = *codecSpecificInfo;
-      codec_info.codecType = kVideoCodecMultiplex;
+      codec_info.codecType = kVideoCodecStereo;
       codec_info.codecSpecific.generic.simulcast_idx = 0;
       encoded_complete_callback_->OnEncodedImage(combined_image_, &codec_info,
                                                  fragmentation);
diff --git a/modules/video_coding/codecs/multiplex/test/multiplex_adapter_unittest.cc b/modules/video_coding/codecs/stereo/test/stereo_adapter_unittest.cc
similarity index 79%
rename from modules/video_coding/codecs/multiplex/test/multiplex_adapter_unittest.cc
rename to modules/video_coding/codecs/stereo/test/stereo_adapter_unittest.cc
index d5e1fb69a1..b1e1275f9b 100644
--- a/modules/video_coding/codecs/multiplex/test/multiplex_adapter_unittest.cc
+++ b/modules/video_coding/codecs/stereo/test/stereo_adapter_unittest.cc
@@ -14,8 +14,8 @@
 #include "common_video/include/video_frame_buffer.h"
 #include "common_video/libyuv/include/webrtc_libyuv.h"
 #include "media/base/mediaconstants.h"
-#include "modules/video_coding/codecs/multiplex/include/multiplex_decoder_adapter.h"
-#include "modules/video_coding/codecs/multiplex/include/multiplex_encoder_adapter.h"
+#include "modules/video_coding/codecs/stereo/include/stereo_decoder_adapter.h"
+#include "modules/video_coding/codecs/stereo/include/stereo_encoder_adapter.h"
 #include "modules/video_coding/codecs/test/video_codec_test.h"
 #include "modules/video_coding/codecs/vp9/include/vp9.h"
 #include "rtc_base/keep_ref_until_done.h"
@@ -26,33 +26,33 @@ using testing::Return;
 
 namespace webrtc {
 
-constexpr const char* kMultiplexAssociatedCodecName = cricket::kVp9CodecName;
-const VideoCodecType kMultiplexAssociatedCodecType =
-    PayloadStringToCodecType(kMultiplexAssociatedCodecName);
+constexpr const char* kStereoAssociatedCodecName = cricket::kVp9CodecName;
+const VideoCodecType kStereoAssociatedCodecType =
+    PayloadStringToCodecType(kStereoAssociatedCodecName);
 
-class TestMultiplexAdapter : public VideoCodecTest {
+class TestStereoAdapter : public VideoCodecTest {
  public:
-  TestMultiplexAdapter()
+  TestStereoAdapter()
       : decoder_factory_(new webrtc::MockVideoDecoderFactory),
         encoder_factory_(new webrtc::MockVideoEncoderFactory) {}
 
  protected:
   std::unique_ptr<VideoDecoder> CreateDecoder() override {
-    return rtc::MakeUnique<MultiplexDecoderAdapter>(
-        decoder_factory_.get(), SdpVideoFormat(kMultiplexAssociatedCodecName));
+    return rtc::MakeUnique<StereoDecoderAdapter>(
+        decoder_factory_.get(), SdpVideoFormat(kStereoAssociatedCodecName));
   }
 
   std::unique_ptr<VideoEncoder> CreateEncoder() override {
-    return rtc::MakeUnique<MultiplexEncoderAdapter>(
-        encoder_factory_.get(), SdpVideoFormat(kMultiplexAssociatedCodecName));
+    return rtc::MakeUnique<StereoEncoderAdapter>(
+        encoder_factory_.get(), SdpVideoFormat(kStereoAssociatedCodecName));
   }
 
   VideoCodec codec_settings() override {
     VideoCodec codec_settings;
-    codec_settings.codecType = kMultiplexAssociatedCodecType;
+    codec_settings.codecType = kStereoAssociatedCodecType;
     codec_settings.VP9()->numberOfTemporalLayers = 1;
     codec_settings.VP9()->numberOfSpatialLayers = 1;
-    codec_settings.codecType = webrtc::kVideoCodecMultiplex;
+    codec_settings.codecType = webrtc::kVideoCodecStereo;
     return codec_settings;
   }
 
@@ -96,22 +96,22 @@ class TestMultiplexAdapter : public VideoCodecTest {
 // TODO(emircan): Currently VideoCodecTest tests do a complete setup
 // step that goes beyond constructing |decoder_|. Simplify these tests to do
 // less.
-TEST_F(TestMultiplexAdapter, ConstructAndDestructDecoder) {
+TEST_F(TestStereoAdapter, ConstructAndDestructDecoder) {
   EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK, decoder_->Release());
 }
 
-TEST_F(TestMultiplexAdapter, ConstructAndDestructEncoder) {
+TEST_F(TestStereoAdapter, ConstructAndDestructEncoder) {
   EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK, encoder_->Release());
 }
 
-TEST_F(TestMultiplexAdapter, EncodeDecodeI420Frame) {
+TEST_F(TestStereoAdapter, EncodeDecodeI420Frame) {
   EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK,
             encoder_->Encode(*input_frame_, nullptr, nullptr));
   EncodedImage encoded_frame;
   CodecSpecificInfo codec_specific_info;
   ASSERT_TRUE(WaitForEncodedFrame(&encoded_frame, &codec_specific_info));
 
-  EXPECT_EQ(kVideoCodecMultiplex, codec_specific_info.codecType);
+  EXPECT_EQ(kVideoCodecStereo, codec_specific_info.codecType);
 
   EXPECT_EQ(
       WEBRTC_VIDEO_CODEC_OK,
@@ -123,7 +123,7 @@ TEST_F(TestMultiplexAdapter, EncodeDecodeI420Frame) {
   EXPECT_GT(I420PSNR(input_frame_.get(), decoded_frame.get()), 36);
 }
 
-TEST_F(TestMultiplexAdapter, EncodeDecodeI420AFrame) {
+TEST_F(TestStereoAdapter, EncodeDecodeI420AFrame) {
   std::unique_ptr<VideoFrame> yuva_frame = CreateI420AInputFrame();
   EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK,
             encoder_->Encode(*yuva_frame, nullptr, nullptr));
@@ -131,7 +131,7 @@ TEST_F(TestMultiplexAdapter, EncodeDecodeI420AFrame) {
   CodecSpecificInfo codec_specific_info;
   ASSERT_TRUE(WaitForEncodedFrame(&encoded_frame, &codec_specific_info));
 
-  EXPECT_EQ(kVideoCodecMultiplex, codec_specific_info.codecType);
+  EXPECT_EQ(kVideoCodecStereo, codec_specific_info.codecType);
 
   EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK,
             decoder_->Decode(encoded_frame, false, nullptr, nullptr));
diff --git a/modules/video_coding/rtp_frame_reference_finder.cc b/modules/video_coding/rtp_frame_reference_finder.cc
index 512d6f26f4..0aaeaec79f 100644
--- a/modules/video_coding/rtp_frame_reference_finder.cc
+++ b/modules/video_coding/rtp_frame_reference_finder.cc
@@ -98,7 +98,7 @@ RtpFrameReferenceFinder::ManageFrameInternal(RtpFrameObject* frame) {
     case kVideoCodecUnknown:
     case kVideoCodecH264:
     case kVideoCodecI420:
-    case kVideoCodecMultiplex:
+    case kVideoCodecStereo:
     case kVideoCodecGeneric:
       return ManageFrameGeneric(frame, kNoPictureId);
   }
diff --git a/modules/video_coding/video_codec_initializer.cc b/modules/video_coding/video_codec_initializer.cc
index 8a86571b82..24c9e7cd17 100644
--- a/modules/video_coding/video_codec_initializer.cc
+++ b/modules/video_coding/video_codec_initializer.cc
@@ -39,7 +39,7 @@ bool VideoCodecInitializer::SetupCodec(
     bool nack_enabled,
     VideoCodec* codec,
     std::unique_ptr<VideoBitrateAllocator>* bitrate_allocator) {
-  if (PayloadStringToCodecType(settings.payload_name) == kVideoCodecMultiplex) {
+  if (PayloadStringToCodecType(settings.payload_name) == kVideoCodecStereo) {
     VideoSendStream::Config::EncoderSettings associated_codec_settings =
         settings;
     associated_codec_settings.payload_name =
@@ -49,7 +49,7 @@ bool VideoCodecInitializer::SetupCodec(
       RTC_LOG(LS_ERROR) << "Failed to create stereo encoder configuration.";
       return false;
     }
-    codec->codecType = kVideoCodecMultiplex;
+    codec->codecType = kVideoCodecStereo;
     strncpy(codec->plName, settings.payload_name.c_str(),
             sizeof(codec->plName));
     return true;
diff --git a/modules/video_coding/video_codec_initializer_unittest.cc b/modules/video_coding/video_codec_initializer_unittest.cc
index ed6ad9c5d5..e8925e1854 100644
--- a/modules/video_coding/video_codec_initializer_unittest.cc
+++ b/modules/video_coding/video_codec_initializer_unittest.cc
@@ -79,7 +79,7 @@ class VideoCodecInitializerTest : public ::testing::Test {
           webrtc::VideoEncoderConfig::Vp8EncoderSpecificSettings>(vp8_settings);
       settings_.payload_name = kVp8PayloadName;
       settings_.payload_type = kVp8PayloadType;
-    } else if (type == VideoCodecType::kVideoCodecMultiplex) {
+    } else if (type == VideoCodecType::kVideoCodecStereo) {
     } else {
       ADD_FAILURE() << "Unexpected codec type: " << type;
     }
@@ -94,7 +94,7 @@ class VideoCodecInitializerTest : public ::testing::Test {
                                            &bitrate_allocator_out_)) {
       return false;
     }
-    if (codec_out_.codecType == VideoCodecType::kVideoCodecMultiplex)
+    if (codec_out_.codecType == VideoCodecType::kVideoCodecStereo)
       return true;
     // Make sure temporal layers instances have been created.
     if (codec_out_.codecType == VideoCodecType::kVideoCodecVP8) {
@@ -257,8 +257,8 @@ TEST_F(VideoCodecInitializerTest, HighFpsSimulcastVp8Screenshare) {
             bitrate_allocation.GetBitrate(1, 1));
 }
 
-TEST_F(VideoCodecInitializerTest, SingleStreamMultiplexCodec) {
-  SetUpFor(VideoCodecType::kVideoCodecMultiplex, 1, 1, true);
+TEST_F(VideoCodecInitializerTest, SingleStreamStereoCodec) {
+  SetUpFor(VideoCodecType::kVideoCodecStereo, 1, 1, true);
   streams_.push_back(DefaultStream());
   EXPECT_TRUE(InitializeCodec());
 }
diff --git a/test/video_codec_settings.h b/test/video_codec_settings.h
index bdf8ca5cce..5dabc70265 100644
--- a/test/video_codec_settings.h
+++ b/test/video_codec_settings.h
@@ -103,7 +103,7 @@ static void CodecSettings(VideoCodecType codec_type, VideoCodec* settings) {
     case kVideoCodecRED:
     case kVideoCodecULPFEC:
     case kVideoCodecFlexfec:
-    case kVideoCodecMultiplex:
+    case kVideoCodecStereo:
     case kVideoCodecGeneric:
     case kVideoCodecUnknown:
       RTC_NOTREACHED();
diff --git a/video/payload_router.cc b/video/payload_router.cc
index 1d16fbd8c0..743abc5e9d 100644
--- a/video/payload_router.cc
+++ b/video/payload_router.cc
@@ -81,7 +81,7 @@ void CopyCodecSpecific(const CodecSpecificInfo* info, RTPVideoHeader* rtp) {
       rtp->codecHeader.H264.packetization_mode =
           info->codecSpecific.H264.packetization_mode;
       return;
-    case kVideoCodecMultiplex:
+    case kVideoCodecStereo:
     case kVideoCodecGeneric:
       rtp->codec = kRtpVideoGeneric;
       rtp->simulcastIdx = info->codecSpecific.generic.simulcast_idx;
diff --git a/video/video_receive_stream.cc b/video/video_receive_stream.cc
index dcffc9f703..17ddb4864f 100644
--- a/video/video_receive_stream.cc
+++ b/video/video_receive_stream.cc
@@ -60,11 +60,11 @@ VideoCodec CreateDecoderVideoCodec(const VideoReceiveStream::Decoder& decoder) {
     *(codec.H264()) = VideoEncoder::GetDefaultH264Settings();
     codec.H264()->profile =
         H264::ParseSdpProfileLevelId(decoder.codec_params)->profile;
-  } else if (codec.codecType == kVideoCodecMultiplex) {
+  } else if (codec.codecType == kVideoCodecStereo) {
     VideoReceiveStream::Decoder associated_decoder = decoder;
     associated_decoder.payload_name = CodecTypeToPayloadString(kVideoCodecVP9);
     VideoCodec associated_codec = CreateDecoderVideoCodec(associated_decoder);
-    associated_codec.codecType = kVideoCodecMultiplex;
+    associated_codec.codecType = kVideoCodecStereo;
     strncpy(associated_codec.plName, decoder.payload_name.c_str(),
             sizeof(associated_codec.plName));
     return associated_codec;