return -1;
slice_param->macroblock_offset = macroblock_offset;
slice_param->slice_horizontal_position = s->mb_x;
- slice_param->slice_vertical_position = s->mb_y;
+ slice_param->slice_vertical_position = s->mb_y >> (s->picture_structure != PICT_FRAME);
slice_param->quantiser_scale_code = quantiser_scale_code;
slice_param->intra_slice_flag = intra_slice_flag;
return 0;