void ff_set_mpeg4_time(MpegEncContext *s)
{
    if (s->pict_type == AV_PICTURE_TYPE_B) {
        ff_mpeg4_init_direct_mv(s);
    } else {
        s->last_time_base = s->time_base;
        s->time_base      = FFUDIV(s->time, s->avctx->time_base.den);
    }
}
Unknown