fate: add tests for the setsar and setdar video filters.

tests/lavfi-regression.sh

@@ -35,6 +35,8 @@ do_lavfi "crop_vflip"         "crop=iw-100:ih-100:100:100,vflip"
 do_lavfi "null"               "null"
 do_lavfi "scale200"           "scale=200:200"
 do_lavfi "scale500"           "scale=500:500"
+do_lavfi "setdar"             "setdar=16/9"
+do_lavfi "setsar"             "setsar=16/11"
 do_lavfi "vflip"              "vflip"
 do_lavfi "vflip_crop"         "vflip,crop=iw-100:ih-100:100:100"
 do_lavfi "vflip_vflip"        "vflip,vflip"

tests/ref/lavfi/setdar

+setdar              f94e744d160c65af967315f0145612a7

tests/ref/lavfi/setsar

+setsar              f94e744d160c65af967315f0145612a7