SMPTE 386M (D-10) lists 4 as value to be used
SMPTE 377-1-2009 says
    "The definitions of 00h (coSiting) and 04h (Rec 601) are equivalent. The value of 04h is deprecated. New
     MXF encoders shall use the value of 00h instead."
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>