Update max TL0 frame interval for screensharing.

webrtc/modules/video_coding/codecs/vp8/screenshare_layers.cc

 /* Copyright (c) 2013 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 "webrtc/modules/video_coding/codecs/vp8/screenshare_layers.h"
@@ skipping 17 matching lines @@
 static const int kQpDeltaThresholdForSync = 8;
 static const int kMinBitrateKbpsForQpBoost = 500;
 
 const double ScreenshareLayers::kMaxTL0FpsReduction = 2.5;
 const double ScreenshareLayers::kAcceptableTargetOvershoot = 2.0;
 
 constexpr int ScreenshareLayers::kMaxNumTemporalLayers;
 
 // Always emit a frame with certain interval, even if bitrate targets have
 // been exceeded. This prevents needless keyframe requests.
-const int ScreenshareLayers::kMaxFrameIntervalMs = 3000;
+const int ScreenshareLayers::kMaxFrameIntervalMs = 2750;
 
 webrtc::TemporalLayers* ScreenshareTemporalLayersFactory::Create(
     int simulcast_id,
     int num_temporal_layers,
     uint8_t initial_tl0_pic_idx) const {
   webrtc::TemporalLayers* tl;
   if (simulcast_id == 0) {
     tl = new webrtc::ScreenshareLayers(num_temporal_layers, rand(),
                                        webrtc::Clock::GetRealTimeClock());
   } else {
@@ skipping 411 matching lines @@
       RTC_HISTOGRAM_COUNTS_10000("WebRTC.Video.Screenshare.Layer1.Qp",
                                  stats_.tl1_qp_sum_ / stats_.num_tl1_frames_);
       RTC_HISTOGRAM_COUNTS_10000(
           "WebRTC.Video.Screenshare.Layer1.TargetBitrate",
           stats_.tl1_target_bitrate_sum_ / stats_.num_tl1_frames_);
     }
   }
 }
 
 }  // namespace webrtc