[x265] [PATCH] rc: change the number of rows for updating rc stats

[Divya Manivannan]

# HG changeset patch
# User Divya Manivannan <divya at multicorewareinc.com>
# Date 1459171242 -19800
#      Mon Mar 28 18:50:42 2016 +0530
# Node ID 2f03f22faf370fe5f70c16a2f1d021613ac84851
# Parent  5dbd6a0c8e17481a0c4d31243ebc8b46ad59e15d
rc: change the number of rows for updating rc stats

diff -r 5dbd6a0c8e17 -r 2f03f22faf37 source/encoder/frameencoder.cpp
--- a/source/encoder/frameencoder.cpp	Mon Mar 28 12:53:40 2016 +0530
+++ b/source/encoder/frameencoder.cpp	Mon Mar 28 18:50:42 2016 +0530
@@ -1214,7 +1214,7 @@
     if (m_param->rc.rateControlMode == X265_RC_ABR || bIsVbv)
     {
         if ((uint32_t)m_rce.encodeOrder <= 2 * (m_param->fpsNum / m_param->fpsDenom))
-            rowCount = X265_MIN((m_numRows + 1) / 2, m_numRows - 1);
+            rowCount = X265_MIN((m_numRows + 1) / 2, 6); // 6 is used to avoid updating stats after half the frame in 1080p, 4k videos.
         else
             rowCount = X265_MIN(m_refLagRows, m_numRows - 1);
         if (row == rowCount)