Fix flake in TwoStreamsSendAndReceive.

webrtc/media/engine/webrtcvideoengine2_unittest.cc

 /*
  *  Copyright (c) 2004 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.
  */
 
@@ skipping 853 matching lines @@
 
 TEST_F(WebRtcVideoChannel2BaseTest, SendAndReceiveVp8Qvga) {
   SendAndReceive(cricket::VideoCodec(100, "VP8", 320, 200, 30));
 }
 
 TEST_F(WebRtcVideoChannel2BaseTest, SendAndReceiveVp8SvcQqvga) {
   SendAndReceive(cricket::VideoCodec(100, "VP8", 160, 100, 30));
 }
 
 TEST_F(WebRtcVideoChannel2BaseTest, TwoStreamsSendAndReceive) {
-  Base::TwoStreamsSendAndReceive(kVp8Codec);
+  // Set a high bitrate to not be downscaled by VP8 due to low initial start
+  // bitrates. This currently happens at <250k, and two streams sharing 300k
+  // initially will use QVGA instead of VGA.
+  // TODO(pbos): Set up the quality scaler so that both senders reliably start
+  // at QVGA, then verify that instead.
+  cricket::VideoCodec codec = kVp8Codec;
+  codec.params[kCodecParamStartBitrate] = "1000000";
+  Base::TwoStreamsSendAndReceive(codec);
 }
 
 class WebRtcVideoChannel2Test : public WebRtcVideoEngine2Test {
  public:
   WebRtcVideoChannel2Test() : WebRtcVideoChannel2Test("") {}
   explicit WebRtcVideoChannel2Test(const char* field_trials)
       : WebRtcVideoEngine2Test(field_trials), last_ssrc_(0) {}
   void SetUp() override {
     fake_call_.reset(new FakeCall(webrtc::Call::Config()));
     engine_.Init();
@@ skipping 2721 matching lines @@
 }
 
 // Test that we normalize send codec format size in simulcast.
 TEST_F(WebRtcVideoChannel2SimulcastTest, SetSendCodecsWithOddSizeInSimulcast) {
   cricket::VideoCodec codec(kVp8Codec270p);
   codec.width += 1;
   codec.height += 1;
   VerifySimulcastSettings(codec, 2, 2);
 }
 }  // namespace cricket