Update x264 presets in line with latest x264 changes.

Patch by Lou Logan.

Originally committed as revision 22714 to svn://svn.ffmpeg.org/ffmpeg/trunk

ffpresets/libx264-faster.ffpreset

@@ -18,5 +18,6 @@ bf=3
 refs=2
 directpred=1
 trellis=1
-flags2=+bpyramid-mixed_refs+wpred+dct8x8+fastpskip-mbtree
+flags2=+bpyramid-mixed_refs+wpred+dct8x8+fastpskip
 wpredp=1
+rc_lookahead=20

ffpresets/libx264-faster_firstpass.ffpreset

@@ -18,5 +18,6 @@ bf=3
 refs=1
 directpred=1
 trellis=0
-flags2=+bpyramid-mixed_refs+wpred-dct8x8+fastpskip-mbtree
+flags2=+bpyramid-mixed_refs+wpred-dct8x8+fastpskip
 wpredp=1
+rc_lookahead=20

ffpresets/libx264-superfast.ffpreset

+coder=1
+flags=+loop
+cmp=+chroma
+partitions=+parti8x8+parti4x4-partp8x8-partb8x8
+me_method=dia
+subq=1
+me_range=16
+g=250
+keyint_min=25
+sc_threshold=40
+i_qfactor=0.71
+b_strategy=1
+qcomp=0.6
+qmin=10
+qmax=51
+qdiff=4
+bf=3
+refs=1
+directpred=1
+trellis=0
+flags2=+bpyramid-mixed_refs+wpred+dct8x8+fastpskip-mbtree
+wpredp=0

ffpresets/libx264-superfast_firstpass.ffpreset

+coder=1
+flags=+loop
+cmp=+chroma
+partitions=-parti8x8-parti4x4-partp8x8-partb8x8
+me_method=dia
+subq=1
+me_range=16
+g=250
+keyint_min=25
+sc_threshold=40
+i_qfactor=0.71
+b_strategy=1
+qcomp=0.6
+qmin=10
+qmax=51
+qdiff=4
+bf=3
+refs=1
+directpred=1
+trellis=0
+flags2=+bpyramid-mixed_refs+wpred-dct8x8+fastpskip-mbtree
+wpredp=0

ffpresets/libx264-veryfast.ffpreset

 coder=1
 flags=+loop
 cmp=+chroma
-partitions=+parti8x8+parti4x4-partp8x8-partb8x8
-me_method=dia
-subq=1
+partitions=+parti8x8+parti4x4+partp8x8+partb8x8
+me_method=hex
+subq=2
 me_range=16
 g=250
 keyint_min=25

ffpresets/libx264-veryfast_firstpass.ffpreset

@@ -3,7 +3,7 @@ flags=+loop
 cmp=+chroma
 partitions=-parti8x8-parti4x4-partp8x8-partb8x8
 me_method=dia
-subq=1
+subq=2
 me_range=16
 g=250
 keyint_min=25