fate/filter-video: fix hqx on big endian part 2

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

tests/fate/filter-video.mak

@@ -148,9 +148,9 @@ fate-filter-hqdn3d-sample: CMD = framecrc -idct simple -i $(TARGET_SAMPLES)/smjp
 
 FATE_FILTER_HQX-$(call ALLYES, IMAGE2_DEMUXER PNG_DECODER HQX_FILTER) = fate-filter-hq2x fate-filter-hq3x fate-filter-hq4x
 FATE_FILTER-yes += $(FATE_FILTER_HQX-yes)
-fate-filter-hq2x: CMD = framecrc -i $(TARGET_SAMPLES)/filter/pixelart%d.png -vf hqx=2
-fate-filter-hq3x: CMD = framecrc -i $(TARGET_SAMPLES)/filter/pixelart%d.png -vf hqx=3
-fate-filter-hq4x: CMD = framecrc -i $(TARGET_SAMPLES)/filter/pixelart%d.png -vf hqx=4
+fate-filter-hq2x: CMD = framecrc -i $(TARGET_SAMPLES)/filter/pixelart%d.png -vf hqx=2 -pix_fmt bgra
+fate-filter-hq3x: CMD = framecrc -i $(TARGET_SAMPLES)/filter/pixelart%d.png -vf hqx=3 -pix_fmt bgra
+fate-filter-hq4x: CMD = framecrc -i $(TARGET_SAMPLES)/filter/pixelart%d.png -vf hqx=4 -pix_fmt bgra
 fate-filter-hqx: $(FATE_FILTER_HQX-yes)
 
 FATE_FILTER-$(call ALLYES, UTVIDEO_DECODER AVI_DEMUXER PERMS_FILTER CURVES_FILTER) += fate-filter-curves