void ff_clean_h263_qscales(MpegEncContext *s);
int ff_h263_resync(MpegEncContext *s);
-const uint8_t *ff_h263_find_resync_marker(MpegEncContext *s, const uint8_t *p, const uint8_t *end);
int ff_h263_get_gob_height(MpegEncContext *s);
void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code);