fate: add MxPEG test

Signed-off-by: Paul B Mahol <onemda@gmail.com>

tests/fate/video.mak

@@ -169,6 +169,9 @@ fate-motionpixels: CMD = framecrc -i $(SAMPLES)/motion-pixels/INTRO-partial.MVI
 FATE_VIDEO-$(call DEMDEC, MPEGTS, MPEG2VIDEO) += fate-mpeg2-field-enc
 fate-mpeg2-field-enc: CMD = framecrc -flags +bitexact -dct fastint -idct simple -i $(SAMPLES)/mpeg2/mpeg2_field_encoding.ts -an
 
+FATE_VIDEO-$(call DEMDEC, MXG, MXPEG) += fate-mxpeg
+fate-mxpeg: CMD = framecrc -i $(SAMPLES)/mxpeg/m1.mxg -an
+
 # FIXME dropped frames in this test because of coarse timebase
 FATE_NUV += fate-nuv-rtjpeg
 fate-nuv-rtjpeg: CMD = framecrc -idct simple -i $(SAMPLES)/nuv/Today.nuv -an

tests/ref/fate/mxpeg

+#tb 0: 4/63
+0,          0,          0,        1,  1843200, 0xfbc64e5e
+0,          4,          4,        1,  1843200, 0x0325436d
+0,          6,          6,        1,  1843200, 0x72293af6
+0,          8,          8,        1,  1843200, 0x608b48a1
+0,         12,         12,        1,  1843200, 0x95b55713
+0,         14,         14,        1,  1843200, 0x30f2575d
+0,         16,         16,        1,  1843200, 0xafe6653a
+0,         18,         18,        1,  1843200, 0x483b67ef
+0,         22,         22,        1,  1843200, 0x9da77507
+0,         24,         24,        1,  1843200, 0xff4e61b5
+0,         26,         26,        1,  1843200, 0xd10881df
+0,         30,         30,        1,  1843200, 0x43806847
+0,         32,         32,        1,  1843200, 0xe0656da0
+0,         34,         34,        1,  1843200, 0x21698a2f
+0,         38,         38,        1,  1843200, 0x9bdd7bd8
+0,         40,         40,        1,  1843200, 0x7dfd76e1
+0,         42,         42,        1,  1843200, 0xd2f381d3
+0,         44,         44,        1,  1843200, 0x394f754c
+0,         48,         48,        1,  1843200, 0x4447830c
+0,         50,         50,        1,  1843200, 0x1f1c9d2c
+0,         52,         52,        1,  1843200, 0x5d897cfb
+0,         54,         54,        1,  1843200, 0x67cc804e
+0,         58,         58,        1,  1843200, 0xce0d792f
+0,         60,         60,        1,  1843200, 0x732b6e3a
+0,         62,         62,        1,  1843200, 0xe1e95c01
+0,         64,         64,        1,  1843200, 0x5fe55a6e
+0,         68,         68,        1,  1843200, 0x9f2a4943
+0,         70,         70,        1,  1843200, 0xbff12c77
+0,         72,         72,        1,  1843200, 0xe9812e89
+0,         74,         74,        1,  1843200, 0x70632ca1