diff --git a/modules/video_coding/codecs/vp8/screenshare_layers.cc b/modules/video_coding/codecs/vp8/screenshare_layers.cc
index 782dc77..444c0cc 100644
--- a/modules/video_coding/codecs/vp8/screenshare_layers.cc
+++ b/modules/video_coding/codecs/vp8/screenshare_layers.cc
@@ -85,6 +85,7 @@
       last_timestamp_(-1),
       last_sync_timestamp_(-1),
       last_emitted_tl0_timestamp_(-1),
+      last_frame_time_ms_(-1),
       min_qp_(-1),
       max_qp_(-1),
       max_debt_bytes_(0),
@@ -113,14 +114,6 @@
   }
 
   const int64_t now_ms = clock_->TimeInMilliseconds();
-  if (target_framerate_.value_or(0) > 0 &&
-      encode_framerate_.Rate(now_ms).value_or(0) > *target_framerate_) {
-    // Max framerate exceeded, drop frame.
-    return TemporalLayers::FrameConfig(kNone, kNone, kNone);
-  }
-
-  if (stats_.first_frame_time_ms_ == -1)
-    stats_.first_frame_time_ms_ = now_ms;
 
   int64_t unwrapped_timestamp = time_wrap_handler_.Unwrap(timestamp);
   int64_t ts_diff;
@@ -129,10 +122,31 @@
   } else {
     ts_diff = unwrapped_timestamp - last_timestamp_;
   }
+
+  if (target_framerate_) {
+    // If input frame rate exceeds target frame rate, either over a one second
+    // averaging window, or if frame interval is below 90% of desired value,
+    // drop frame.
+    // Use real-time clock rather than timestamps, in case there is a
+    // discontinuity in the timestamps sequence.
+    if (encode_framerate_.Rate(now_ms).value_or(0) > *target_framerate_)
+      return TemporalLayers::FrameConfig(kNone, kNone, kNone);
+
+    int64_t expected_frame_interval_ms = 1000 / *target_framerate_;
+    if (last_frame_time_ms_ != -1 &&
+        now_ms - last_frame_time_ms_ < (9 * expected_frame_interval_ms) / 10) {
+      return TemporalLayers::FrameConfig(kNone, kNone, kNone);
+    }
+  }
+
+  if (stats_.first_frame_time_ms_ == -1)
+    stats_.first_frame_time_ms_ = now_ms;
+
   // Make sure both frame droppers leak out bits.
   layers_[0].UpdateDebt(ts_diff / 90);
   layers_[1].UpdateDebt(ts_diff / 90);
   last_timestamp_ = timestamp;
+  last_frame_time_ms_ = now_ms;
 
   TemporalLayerState layer_state = TemporalLayerState::kDrop;
 
@@ -360,8 +374,20 @@
 bool ScreenshareLayers::UpdateConfiguration(vpx_codec_enc_cfg_t* cfg) {
   bool cfg_updated = false;
   uint32_t target_bitrate_kbps = GetCodecTargetBitrateKbps();
-  if (bitrate_updated_ || cfg->rc_target_bitrate != target_bitrate_kbps) {
-    cfg->rc_target_bitrate = target_bitrate_kbps;
+
+  // TODO(sprang): We _really_ need to make an overhaul of this class. :(
+  // If we're dropping frames in order to meet a target framerate, adjust the
+  // bitrate assigned to the encoder so the total average bitrate is correct.
+  float encoder_config_bitrate_kbps = target_bitrate_kbps;
+  if (target_framerate_ && capture_framerate_ &&
+      *target_framerate_ < *capture_framerate_) {
+    encoder_config_bitrate_kbps *=
+        static_cast<float>(*capture_framerate_) / *target_framerate_;
+  }
+
+  if (bitrate_updated_ ||
+      cfg->rc_target_bitrate != encoder_config_bitrate_kbps) {
+    cfg->rc_target_bitrate = encoder_config_bitrate_kbps;
 
     // Don't reconfigure qp limits during quality boost frames.
     if (active_layer_ == -1 ||
diff --git a/modules/video_coding/codecs/vp8/screenshare_layers.h b/modules/video_coding/codecs/vp8/screenshare_layers.h
index 81db90a..7143351 100644
--- a/modules/video_coding/codecs/vp8/screenshare_layers.h
+++ b/modules/video_coding/codecs/vp8/screenshare_layers.h
@@ -71,6 +71,7 @@
   int64_t last_timestamp_;
   int64_t last_sync_timestamp_;
   int64_t last_emitted_tl0_timestamp_;
+  int64_t last_frame_time_ms_;
   rtc::TimestampWrapAroundHandler time_wrap_handler_;
   int min_qp_;
   int max_qp_;
diff --git a/modules/video_coding/codecs/vp8/screenshare_layers_unittest.cc b/modules/video_coding/codecs/vp8/screenshare_layers_unittest.cc
index 754235a..422905d 100644
--- a/modules/video_coding/codecs/vp8/screenshare_layers_unittest.cc
+++ b/modules/video_coding/codecs/vp8/screenshare_layers_unittest.cc
@@ -70,7 +70,7 @@
   }
 
   int ConfigureFrame(bool key_frame) {
-    tl_config_ = layers_->UpdateLayerConfig(timestamp_);
+    tl_config_ = UpdateLayerConfig(timestamp_);
     EXPECT_EQ(0, tl_config_.encoder_layer_id)
         << "ScreenshareLayers always encodes using the bitrate allocator for "
            "layer 0, but may reference different buffers and packetize "
@@ -86,6 +86,12 @@
     return flags;
   }
 
+  TemporalLayers::FrameConfig UpdateLayerConfig(uint32_t timestamp) {
+    int64_t timestamp_ms = timestamp / 90;
+    clock_.AdvanceTimeMilliseconds(timestamp_ms - clock_.TimeInMilliseconds());
+    return layers_->UpdateLayerConfig(timestamp);
+  }
+
   int FrameSizeForBitrate(int bitrate_kbps) {
     return ((bitrate_kbps * 1000) / 8) / kFrameRate;
   }
@@ -206,7 +212,7 @@
   std::vector<int> sync_times;
   const int kNumFrames = kMaxSyncPeriodSeconds * kFrameRate * 2 - 1;
   for (int i = 0; i < kNumFrames; ++i) {
-    tl_config_ = layers_->UpdateLayerConfig(timestamp_);
+    tl_config_ = UpdateLayerConfig(timestamp_);
     config_updated_ = layers_->UpdateConfiguration(&cfg_);
     layers_->PopulateCodecSpecific(false, tl_config_, &vp8_info_, timestamp_);
 
@@ -431,8 +437,8 @@
   layers_->OnRatesUpdated(kLowBitrateKbps, kLowBitrateKbps, 5);
   layers_->UpdateConfiguration(&cfg_);
 
-  EXPECT_EQ(kTl0Flags, VP8EncoderImpl::EncodeFlags(
-                           layers_->UpdateLayerConfig(kStartTimestamp)));
+  EXPECT_EQ(kTl0Flags,
+            VP8EncoderImpl::EncodeFlags(UpdateLayerConfig(kStartTimestamp)));
   layers_->FrameEncoded(kLargeFrameSizeBytes, kDefaultQp);
 
   const uint32_t kTwoSecondsLater =
@@ -442,11 +448,16 @@
   ASSERT_GT(kStartTimestamp + 90 * (kLargeFrameSizeBytes * 8) / kLowBitrateKbps,
             kStartTimestamp + (ScreenshareLayers::kMaxFrameIntervalMs * 90));
 
-  EXPECT_TRUE(layers_->UpdateLayerConfig(kTwoSecondsLater).drop_frame);
+  // Expect drop one frame interval before the two second timeout. If we try
+  // any later, the frame will be dropped anyway by the frame rate throttling
+  // logic.
+  EXPECT_TRUE(
+      UpdateLayerConfig(kTwoSecondsLater - kTimestampDelta5Fps).drop_frame);
+
   // More than two seconds has passed since last frame, one should be emitted
   // even if bitrate target is then exceeded.
   EXPECT_EQ(kTl0Flags, VP8EncoderImpl::EncodeFlags(
-                           layers_->UpdateLayerConfig(kTwoSecondsLater + 90)));
+                           UpdateLayerConfig(kTwoSecondsLater + 90)));
 }
 
 TEST_F(ScreenshareLayerTest, UpdatesHistograms) {
@@ -459,7 +470,7 @@
   for (int64_t timestamp = 0;
        timestamp < kTimestampDelta5Fps * 5 * metrics::kMinRunTimeInSeconds;
        timestamp += kTimestampDelta5Fps) {
-    tl_config_ = layers_->UpdateLayerConfig(timestamp);
+    tl_config_ = UpdateLayerConfig(timestamp);
     if (tl_config_.drop_frame) {
       dropped_frame = true;
       continue;
@@ -472,8 +483,6 @@
       // Simulate one overshoot.
       layers_->FrameEncoded(0, 0);
       overshoot = true;
-      flags =
-          VP8EncoderImpl::EncodeFlags(layers_->UpdateLayerConfig(timestamp));
     }
 
     if (flags == kTl0Flags) {
@@ -547,7 +556,7 @@
 
   // Send at regular rate - no drops expected.
   for (int64_t i = 0; i < kTestSpanMs; i += kFrameIntervalsMs) {
-    if (layers_->UpdateLayerConfig(timestamp).drop_frame) {
+    if (UpdateLayerConfig(timestamp).drop_frame) {
       ++num_discarded_frames;
     } else {
       size_t frame_size_bytes = kDefaultTl0BitrateKbps * kFrameIntervalsMs / 8;
@@ -563,7 +572,7 @@
   num_input_frames = 0;
   num_discarded_frames = 0;
   for (int64_t i = 0; i < kTestSpanMs; i += kFrameIntervalsMs / 2) {
-    if (layers_->UpdateLayerConfig(timestamp).drop_frame) {
+    if (UpdateLayerConfig(timestamp).drop_frame) {
       ++num_discarded_frames;
     } else {
       size_t frame_size_bytes = kDefaultTl0BitrateKbps * kFrameIntervalsMs / 8;
@@ -589,13 +598,6 @@
   // Simulate overshoot of this frame.
   layers_->FrameEncoded(0, -1);
 
-  // Reencode, frame config, flags and codec specific info should remain the
-  // same as for the dropped frame.
-  timestamp_ -= kTimestampDelta5Fps;  // Undo last timestamp increment.
-  TemporalLayers::FrameConfig new_tl_config =
-      layers_->UpdateLayerConfig(timestamp_);
-  EXPECT_EQ(tl_config_, new_tl_config);
-
   config_updated_ = layers_->UpdateConfiguration(&cfg_);
   EXPECT_EQ(kTl1SyncFlags, VP8EncoderImpl::EncodeFlags(tl_config_));
 
@@ -604,4 +606,42 @@
   EXPECT_TRUE(new_vp8_info.layerSync);
 }
 
+TEST_F(ScreenshareLayerTest, DropOnTooShortFrameInterval) {
+  // Run grace period so we have existing frames in both TL0 and Tl1.
+  EXPECT_TRUE(RunGracePeriod());
+
+  // Add a large gap, so there's plenty of room in the rate tracker.
+  timestamp_ += kTimestampDelta5Fps * 3;
+  EXPECT_FALSE(UpdateLayerConfig(timestamp_).drop_frame);
+  layers_->FrameEncoded(frame_size_, kDefaultQp);
+
+  // Frame interval below 90% if desired time is not allowed, try inserting
+  // frame just before this limit.
+  const int64_t kMinFrameInterval = (kTimestampDelta5Fps * 9) / 10;
+  timestamp_ += kMinFrameInterval - 90;
+  EXPECT_TRUE(UpdateLayerConfig(timestamp_).drop_frame);
+
+  // Try again at the limit, now it should pass.
+  timestamp_ += 90;
+  EXPECT_FALSE(UpdateLayerConfig(timestamp_).drop_frame);
+}
+
+TEST_F(ScreenshareLayerTest, AdjustsBitrateWhenDroppingFrames) {
+  const uint32_t kTimestampDelta10Fps = kTimestampDelta5Fps / 2;
+  const int kNumFrames = 30;
+  uint32_t default_bitrate = cfg_.rc_target_bitrate;
+  layers_->OnRatesUpdated(kDefaultTl0BitrateKbps, kDefaultTl1BitrateKbps, 10);
+
+  int num_dropped_frames = 0;
+  for (int i = 0; i < kNumFrames; ++i) {
+    if (EncodeFrame(false) == -1)
+      ++num_dropped_frames;
+    timestamp_ += kTimestampDelta10Fps;
+  }
+  layers_->UpdateConfiguration(&cfg_);
+
+  EXPECT_EQ(num_dropped_frames, kNumFrames / 2);
+  EXPECT_EQ(cfg_.rc_target_bitrate, default_bitrate * 2);
+}
+
 }  // namespace webrtc