void ff_mpeg4_init_direct_mv(MpegEncContext *s);
int ff_mpeg4_set_direct_mv(MpegEncContext *s, int mx, int my);
void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code);
void ff_mpeg4_init_direct_mv(MpegEncContext *s);
int ff_mpeg4_set_direct_mv(MpegEncContext *s, int mx, int my);
void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code);