VC1_MV_DIFF_VLC_BITS   83 libavcodec/vc1data.c #define VC1_MV_DIFF_VLC_BITS 9 //15
VC1_MV_DIFF_VLC_BITS   62 libavcodec/vc1data.h #define VC1_MV_DIFF_VLC_BITS 9 //15