fate/image: Modify aliaspix tests to also cover the encoder

Signed-off-by: NAndreas Rheinhardt <andreas.rheinhardt@outlook.com>

tests/fate/image.mak

 FATE_ALIASPIX += fate-aliaspix-bgr
-fate-aliaspix-bgr: CMD = framecrc -i $(TARGET_SAMPLES)/aliaspix/first.pix -pix_fmt bgr24
+fate-aliaspix-bgr: CMD = transcode alias_pix $(TARGET_SAMPLES)/aliaspix/first.pix image2 "-c alias_pix" "-map 0 -map 0 -pix_fmt:0 bgr24 -c:v:1 copy"
 
 FATE_ALIASPIX += fate-aliaspix-gray
-fate-aliaspix-gray: CMD = framecrc -i $(TARGET_SAMPLES)/aliaspix/firstgray.pix -pix_fmt gray
+fate-aliaspix-gray: CMD = transcode alias_pix $(TARGET_SAMPLES)/aliaspix/firstgray.pix image2 "-c alias_pix" "-map 0 -map 0 -pix_fmt:0 gray -c:v:1 copy"
 
-FATE_ALIASPIX-$(call DEMDEC, IMAGE2, ALIAS_PIX) += $(FATE_ALIASPIX)
+FATE_ALIASPIX-$(call ALLYES, FILE_PROTOCOL IMAGE2_ALIAS_PIX_DEMUXER \
+                             ALIAS_PIX_DECODER ALIAS_PIX_ENCODER    \
+                             IMAGE2_MUXER RAWVIDEO_ENCODER          \
+                             FRAMECRC_MUXER PIPE_PROTOCOL) += $(FATE_ALIASPIX)
 FATE_IMAGE += $(FATE_ALIASPIX-yes)
 fate-aliaspix: $(FATE_ALIASPIX-yes)
 

tests/ref/fate/aliaspix-bgr

+667513c8869eea09e1374a73eb21233c *tests/data/fate/aliaspix-bgr.image2
+63090 tests/data/fate/aliaspix-bgr.image2
 #tb 0: 1/25
 #media_type 0: video
 #codec_id 0: rawvideo
 #dimensions 0: 201x79
 #sar 0: 0/1
+#tb 1: 1/25
+#media_type 1: video
+#codec_id 1: alias_pix
+#dimensions 1: 201x79
+#sar 1: 0/1
 0,          0,          0,        1,    47637, 0xcb77368f
+1,          0,          0,        1,    63090, 0xe49bba3b

tests/ref/fate/aliaspix-gray

+2d7ae310710798257ebcff8a41c646ee *tests/data/fate/aliaspix-gray.image2
+28868 tests/data/fate/aliaspix-gray.image2
 #tb 0: 1/25
 #media_type 0: video
 #codec_id 0: rawvideo
 #dimensions 0: 199x81
 #sar 0: 0/1
+#tb 1: 1/25
+#media_type 1: video
+#codec_id 1: alias_pix
+#dimensions 1: 199x81
+#sar 1: 0/1
 0,          0,          0,        1,    16119, 0x3d0785f5
+1,          0,          0,        1,    28868, 0x02523ce2