diff --git a/talk/media/webrtc/webrtcvideoengine2.cc b/talk/media/webrtc/webrtcvideoengine2.cc
index 7d1ddbadff..2f85ed2893 100644
--- a/talk/media/webrtc/webrtcvideoengine2.cc
+++ b/talk/media/webrtc/webrtcvideoengine2.cc
@@ -483,22 +483,28 @@ void* WebRtcVideoChannel2::WebRtcVideoSendStream::ConfigureVideoEncoderSettings(
       !is_screencast && parameters_.config.rtp.ssrcs.size() == 1;
   bool frame_dropping = !is_screencast;
   bool denoising;
+  bool codec_default_denoising = false;
   if (is_screencast) {
     denoising = false;
   } else {
-    options.video_noise_reduction.Get(&denoising);
+    // Use codec default if video_noise_reduction is unset.
+    codec_default_denoising = !options.video_noise_reduction.Get(&denoising);
   }
 
   if (CodecNamesEq(codec.name, kVp8CodecName)) {
     encoder_settings_.vp8 = webrtc::VideoEncoder::GetDefaultVp8Settings();
     encoder_settings_.vp8.automaticResizeOn = automatic_resize;
-    encoder_settings_.vp8.denoisingOn = denoising;
+    // VP8 denoising is enabled by default.
+    encoder_settings_.vp8.denoisingOn =
+        codec_default_denoising ? true : denoising;
     encoder_settings_.vp8.frameDroppingOn = frame_dropping;
     return &encoder_settings_.vp8;
   }
   if (CodecNamesEq(codec.name, kVp9CodecName)) {
     encoder_settings_.vp9 = webrtc::VideoEncoder::GetDefaultVp9Settings();
-    encoder_settings_.vp9.denoisingOn = denoising;
+    // VP9 denoising is disabled by default.
+    encoder_settings_.vp9.denoisingOn =
+        codec_default_denoising ? false : denoising;
     encoder_settings_.vp9.frameDroppingOn = frame_dropping;
     return &encoder_settings_.vp9;
   }
@@ -781,7 +787,6 @@ void WebRtcVideoChannel2::SetDefaultOptions() {
   options_.cpu_overuse_detection.Set(true);
   options_.dscp.Set(false);
   options_.suspend_below_min_bitrate.Set(false);
-  options_.video_noise_reduction.Set(true);
   options_.screencast_min_bitrate.Set(0);
 }
 
diff --git a/talk/media/webrtc/webrtcvideoengine2_unittest.cc b/talk/media/webrtc/webrtcvideoengine2_unittest.cc
index 1fb3d5d73b..479dd05f55 100644
--- a/talk/media/webrtc/webrtcvideoengine2_unittest.cc
+++ b/talk/media/webrtc/webrtcvideoengine2_unittest.cc
@@ -1661,9 +1661,13 @@ TEST_F(WebRtcVideoChannel2Test, VerifyVp8SpecificSettings) {
 
   EXPECT_TRUE(capturer.CaptureFrame());
 
+  webrtc::VideoCodecVP8 vp8_settings;
+  ASSERT_TRUE(stream->GetVp8Settings(&vp8_settings)) << "No VP8 config set.";
+  EXPECT_TRUE(vp8_settings.denoisingOn)
+      << "VP8 denoising should be on by default.";
+
   stream = SetDenoisingOption(parameters, false);
 
-  webrtc::VideoCodecVP8 vp8_settings;
   ASSERT_TRUE(stream->GetVp8Settings(&vp8_settings)) << "No VP8 config set.";
   EXPECT_FALSE(vp8_settings.denoisingOn);
   EXPECT_TRUE(vp8_settings.automaticResizeOn);
@@ -1749,9 +1753,13 @@ TEST_F(Vp9SettingsTest, VerifyVp9SpecificSettings) {
 
   EXPECT_TRUE(capturer.CaptureFrame());
 
+  webrtc::VideoCodecVP9 vp9_settings;
+  ASSERT_TRUE(stream->GetVp9Settings(&vp9_settings)) << "No VP9 config set.";
+  EXPECT_FALSE(vp9_settings.denoisingOn)
+      << "VP9 denoising should be off by default.";
+
   stream = SetDenoisingOption(parameters, false);
 
-  webrtc::VideoCodecVP9 vp9_settings;
   ASSERT_TRUE(stream->GetVp9Settings(&vp9_settings)) << "No VP9 config set.";
   EXPECT_FALSE(vp9_settings.denoisingOn);
   // Frame dropping always on for real time video.