fate: Force jpeg2000 decoder for dcinema

so that no external decoder is used which would break the test

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

tests/fate/video.mak

@@ -187,7 +187,7 @@ FATE_VIDEO-$(call DEMDEC, IPMOVIE, INTERPLAY_VIDEO) += fate-interplay-mve-16bit
 fate-interplay-mve-16bit: CMD = framecrc -i $(TARGET_SAMPLES)/interplay-mve/descent3-level5-16bit-partial.mve -pix_fmt rgb24 -an
 
 FATE_VIDEO-$(call DEMDEC, MXF, JPEG2000) += fate-jpeg2000-dcinema
-fate-jpeg2000-dcinema: CMD = framecrc -flags +bitexact -i $(TARGET_SAMPLES)/jpeg2000/chiens_dcinema2K.mxf -pix_fmt xyz12le
+fate-jpeg2000-dcinema: CMD = framecrc -flags +bitexact -vcodec jpeg2000 -i $(TARGET_SAMPLES)/jpeg2000/chiens_dcinema2K.mxf -pix_fmt xyz12le
 
 FATE_VIDEO-$(call DEMDEC, JV, JV) += fate-jv
 fate-jv: CMD = framecrc -i $(TARGET_SAMPLES)/jv/intro.jv -an -pix_fmt rgb24