The CMP variable seems to have been inherited from fate-api-seek which set it to null the mxf reference needed a change due to c7e14a279fa7348db10ec824bb2d67858cb1c1ca Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> (cherry picked from commit b83c849e8797fbb972ebd7f2919e0f085061f37f) Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>