fate: increase the number of filtered frames to 20 for edgedetect* & hue

Suggested-by: ubitux
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

tests/fate/filter-video.mak

@@ -245,13 +245,13 @@ FATE_FILTER_VSYNTH-$(CONFIG_VFLIP_FILTER) += fate-filter-vflip_vflip
 fate-filter-vflip_vflip: CMD = video_filter "vflip,vflip"
 
 FATE_FILTER_VSYNTH-$(call ALLYES, FORMAT_FILTER PERMS_FILTER EDGEDETECT_FILTER) += fate-filter-edgedetect
-fate-filter-edgedetect: CMD = video_filter "format=gray,perms=random,edgedetect"
+fate-filter-edgedetect: CMD = video_filter "format=gray,perms=random,edgedetect" -vframes 20
 
 FATE_FILTER_VSYNTH-$(call ALLYES, FORMAT_FILTER PERMS_FILTER EDGEDETECT_FILTER) += fate-filter-edgedetect-colormix
-fate-filter-edgedetect-colormix: CMD = video_filter "format=gbrp,perms=random,edgedetect=mode=colormix"
+fate-filter-edgedetect-colormix: CMD = video_filter "format=gbrp,perms=random,edgedetect=mode=colormix" -vframes 20
 
 FATE_FILTER_VSYNTH-$(call ALLYES, PERMS_FILTER HUE_FILTER) += fate-filter-hue
-fate-filter-hue: CMD = video_filter "perms=random,hue=s=sin(2*PI*t)+1"
+fate-filter-hue: CMD = video_filter "perms=random,hue=s=sin(2*PI*t)+1" -vframes 20
 
 FATE_FILTER_VSYNTH-$(CONFIG_IDET_FILTER) += fate-filter-idet
 fate-filter-idet: CMD = framecrc -flags bitexact -idct simple -i $(SRC) -vf idet -vframes 25 -flags +bitexact

tests/ref/fate/filter-edgedetect

@@ -1 +1 @@
-edgedetect          4c7a24c4193375bcefa0466ca87003f2
+edgedetect          93ceace33f6636bcdbeb037317c65745

tests/ref/fate/filter-edgedetect-colormix

@@ -1 +1 @@
-edgedetect-colormix f1325345d494a30352698c37edcef4c3
+edgedetect-colormix 1b8658252e2f03fbae30e6d63dd24c7c

tests/ref/fate/filter-hue

@@ -1 +1 @@
-hue                 e31a26a7684a3c832532cae130ad5eff
+hue                 57463dd9bc17156a51b704dd7271c863