# HG changeset patch
# User Steve Borho <[email protected]>
# Date 1379133436 18000
# Fri Sep 13 23:37:16 2013 -0500
# Node ID 2555acbc97367b5ea2dcfd921b3ec577e9f5e4f0
# Parent 9c5a74cfacca9e0107c3d5d15521e2000d7bcdbc
slicetype: increase baseline bframe bias by 10%
Our estimateFrameCost() function is not yet checking bidir candidates (because
bidir search in the main encoder needs to be replaced first) and since B frame
estimates cannot use intra modes either this tends to make B frame scores
relatively higher than what x264 finds. So our default bias needs to be a bit
higher in order for the lookahead to select B paths.
diff -r 9c5a74cfacca -r 2555acbc9736 source/encoder/slicetype.cpp
--- a/source/encoder/slicetype.cpp Fri Sep 13 12:59:33 2013 -0500
+++ b/source/encoder/slicetype.cpp Fri Sep 13 23:37:16 2013 -0500
@@ -313,7 +313,7 @@
score = fenc->costEst[b - p0][p1 - b];
if (b != p1)
- score = (uint64_t)score * 100 / (120 + cfg->param.bFrameBias);
+ score = (uint64_t)score * 100 / (130 + cfg->param.bFrameBias);
fenc->costEst[b - p0][p1 - b] = score;
}
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