Tune QP-based quality thresholds.

webrtc/api/java/jni/androidmediaencoder_jni.cc

Index: webrtc/api/java/jni/androidmediaencoder_jni.cc
diff --git a/webrtc/api/java/jni/androidmediaencoder_jni.cc b/webrtc/api/java/jni/androidmediaencoder_jni.cc
index 1530f003dcba30a0a58c06eeb3fc11c7c7294804..69060f8508f448f8494f5c6157884a1b26564fd2 100644
--- a/webrtc/api/java/jni/androidmediaencoder_jni.cc
+++ b/webrtc/api/java/jni/androidmediaencoder_jni.cc
@@ -376,15 +376,15 @@ int32_t MediaCodecVideoEncoder::InitEncode(
       // always = 127. Note that in SW, QP is that of the user-level range [0,
       // 63].
       const int kLowQpThreshold = 29;
-      const int kBadQpThreshold = 90;
+      const int kBadQpThreshold = 100;
       quality_scaler_.Init(kLowQpThreshold, kBadQpThreshold, false,
                            codec_settings->startBitrate, codec_settings->width,
                            codec_settings->height,
                            codec_settings->maxFramerate);
     } else if (codecType_ == kVideoCodecH264) {
       // H264 QP is in the range [0, 51].
-      const int kLowQpThreshold = 21;
-      const int kBadQpThreshold = 33;
+      const int kLowQpThreshold = 24;
+      const int kBadQpThreshold = 39;
       quality_scaler_.Init(kLowQpThreshold, kBadQpThreshold, false,
                            codec_settings->startBitrate, codec_settings->width,
                            codec_settings->height,