Be consistent and use b-frames throughout the presets to avoid confusion about

whether they have to be specified in the first pass as well. Also use
b_strategy=2 in hq and max presets to further improve compression efficiency.

Originally committed as revision 16476 to svn://svn.ffmpeg.org/ffmpeg/trunk

ffpresets/libx264-fastfirstpass.ffpreset

@@ -14,6 +14,7 @@ qcomp=0.6
 qmin=10
 qmax=51
 qdiff=4
+bf=4
 refs=1
 directpred=3
 trellis=0

ffpresets/libx264-hq.ffpreset

@@ -9,12 +9,12 @@ g=250
 keyint_min=25
 sc_threshold=40
 i_qfactor=0.71
-b_strategy=1
+b_strategy=2
 qcomp=0.6
 qmin=10
 qmax=51
 qdiff=4
-bf=16
+bf=4
 refs=4
 directpred=3
 trellis=1

ffpresets/libx264-max.ffpreset

@@ -9,12 +9,12 @@ g=250
 keyint_min=25
 sc_threshold=40
 i_qfactor=0.71
-b_strategy=1
+b_strategy=2
 qcomp=0.6
 qmin=10
 qmax=51
 qdiff=4
-bf=16
+bf=4
 refs=16
 directpred=3
 trellis=2

ffpresets/libx264-normal.ffpreset

@@ -14,7 +14,7 @@ qcomp=0.6
 qmin=10
 qmax=51
 qdiff=4
-bf=16
+bf=4
 refs=2
 directpred=3
 trellis=0