static int is_intra_more_likely(ERContext *s)
{
    int is_intra_likely, i, j, undamaged_count, skip_amount, mb_x, mb_y;

    if (!s->last_pic.f || !s->last_pic.f->data[0])
        return 1; // no previous frame available -> use spatial prediction

    if (s->avctx->error_concealment & FF_EC_FAVOR_INTER)
        return 0;

    undamaged_count = 0;
    for (i = 0; i < s->mb_num; i++) {
        const int mb_xy = s->mb_index2xy[i];
        const int error = s->error_status_table[mb_xy];
        if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))
            undamaged_count++;
    }

    if (undamaged_count < 5)
        return 0; // almost all MBs damaged -> use temporal prediction

    if (CONFIG_XVMC    &&
        s->avctx->hwaccel && s->avctx->hwaccel->decode_mb &&
        s->cur_pic.f->pict_type == AV_PICTURE_TYPE_I)
        return 1;

    skip_amount     = FFMAX(undamaged_count / 50, 1); // check only up to 50 MBs
    is_intra_likely = 0;

    j = 0;
    for (mb_y = 0; mb_y < s->mb_height - 1; mb_y++) {
        for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
            int error;
            const int mb_xy = mb_x + mb_y * s->mb_stride;

            error = s->error_status_table[mb_xy];
            if ((error & ER_DC_ERROR) && (error & ER_MV_ERROR))
                continue; // skip damaged

            j++;
            if ((j % skip_amount) != 0)
                continue;

            if (s->cur_pic.f->pict_type == AV_PICTURE_TYPE_I) {
                int *linesize = s->cur_pic.f->linesize;
                uint8_t *mb_ptr      = s->cur_pic.f->data[0] +
                                       mb_x * 16 + mb_y * 16 * linesize[0];
                uint8_t *last_mb_ptr = s->last_pic.f->data[0] +
                                       mb_x * 16 + mb_y * 16 * linesize[0];

                if (s->avctx->codec_id == AV_CODEC_ID_H264) {
                } else {
                    ff_thread_await_progress(s->last_pic.tf, mb_y, 0);
                }
                is_intra_likely += s->mecc.sad[0](NULL, last_mb_ptr, mb_ptr,
                                                  linesize[0], 16);
                is_intra_likely -= s->mecc.sad[0](NULL, last_mb_ptr,
                                                  last_mb_ptr + linesize[0] * 16,
                                                  linesize[0], 16);
            } else {
                if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
                   is_intra_likely++;
                else
                   is_intra_likely--;
            }
        }
    }
    return is_intra_likely > 0;
}

The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.