static int minimum_frame_bits(VC2EncContext *s)
{
    int slice_x, slice_y, bits = 0;
    s->size_scaler = 64;
    for (slice_y = 0; slice_y < s->num_y; slice_y++) {
        for (slice_x = 0; slice_x < s->num_x; slice_x++) {
            bits += count_hq_slice(s, NULL, slice_x, slice_y, s->q_ceil);
        }
    }
    return bits;
}