diff --git a/modules/video_coding/codecs/multiplex/include/multiplex_encoder_adapter.h b/modules/video_coding/codecs/multiplex/include/multiplex_encoder_adapter.h
index 531d07870e..985bf39fe3 100644
--- a/modules/video_coding/codecs/multiplex/include/multiplex_encoder_adapter.h
+++ b/modules/video_coding/codecs/multiplex/include/multiplex_encoder_adapter.h
@@ -50,7 +50,7 @@ class MultiplexEncoderAdapter : public VideoEncoder {
   int SetRateAllocation(const VideoBitrateAllocation& bitrate,
                         uint32_t new_framerate) override;
   int Release() override;
-  const char* ImplementationName() const override;
+  EncoderInfo GetEncoderInfo() const override;
 
   EncodedImageCallback::Result OnEncodedImage(
       AlphaCodecStream stream_idx,
@@ -81,6 +81,8 @@ class MultiplexEncoderAdapter : public VideoEncoder {
 
   const bool supports_augmented_data_;
   int augmenting_data_size_ = 0;
+
+  EncoderInfo encoder_info_;
 };
 
 }  // namespace webrtc
diff --git a/modules/video_coding/codecs/multiplex/multiplex_encoder_adapter.cc b/modules/video_coding/codecs/multiplex/multiplex_encoder_adapter.cc
index ce645743d1..5ea1fdc2ae 100644
--- a/modules/video_coding/codecs/multiplex/multiplex_encoder_adapter.cc
+++ b/modules/video_coding/codecs/multiplex/multiplex_encoder_adapter.cc
@@ -53,6 +53,7 @@ MultiplexEncoderAdapter::MultiplexEncoderAdapter(
     : factory_(factory),
       associated_format_(associated_format),
       encoded_complete_callback_(nullptr),
+      key_frame_interval_(0),
       supports_augmented_data_(supports_augmented_data) {}
 
 MultiplexEncoderAdapter::~MultiplexEncoderAdapter() {
@@ -92,6 +93,11 @@ int MultiplexEncoderAdapter::InitEncode(const VideoCodec* inst,
       break;
   }
 
+  encoder_info_ = EncoderInfo();
+  encoder_info_.implementation_name = "MultiplexEncoderAdapter (";
+  // This needs to be false so that we can do the split in Encode().
+  encoder_info_.supports_native_handle = false;
+
   for (size_t i = 0; i < kAlphaCodecStreams; ++i) {
     std::unique_ptr<VideoEncoder> encoder =
         factory_->CreateVideoEncoder(associated_format_);
@@ -104,8 +110,17 @@ int MultiplexEncoderAdapter::InitEncode(const VideoCodec* inst,
     adapter_callbacks_.emplace_back(new AdapterEncodedImageCallback(
         this, static_cast<AlphaCodecStream>(i)));
     encoder->RegisterEncodeCompleteCallback(adapter_callbacks_.back().get());
+
+    const EncoderInfo& encoder_impl_info = encoder->GetEncoderInfo();
+    encoder_info_.implementation_name += encoder_impl_info.implementation_name;
+    if (i != kAlphaCodecStreams - 1) {
+      encoder_info_.implementation_name += ", ";
+    }
+
     encoders_.emplace_back(std::move(encoder));
   }
+  encoder_info_.implementation_name += ")";
+
   return WEBRTC_VIDEO_CODEC_OK;
 }
 
@@ -238,8 +253,8 @@ int MultiplexEncoderAdapter::Release() {
   return WEBRTC_VIDEO_CODEC_OK;
 }
 
-const char* MultiplexEncoderAdapter::ImplementationName() const {
-  return "MultiplexEncoderAdapter";
+VideoEncoder::EncoderInfo MultiplexEncoderAdapter::GetEncoderInfo() const {
+  return encoder_info_;
 }
 
 EncodedImageCallback::Result MultiplexEncoderAdapter::OnEncodedImage(