obu: set subsampling to 1 for monochrome

parent 8f87eebe
......@@ -221,7 +221,7 @@ static int parse_seq_hdr(Dav1dContext *const c, GetBits *const gb,
if (hdr->monochrome) {
hdr->color_range = dav1d_get_bits(gb, 1);
hdr->layout = DAV1D_PIXEL_LAYOUT_I400;
hdr->ss_hor = hdr->ss_ver = 0;
hdr->ss_hor = hdr->ss_ver = 1;
hdr->chr = DAV1D_CHR_UNKNOWN;
hdr->separate_uv_delta_q = 0;
} else if (hdr->pri == DAV1D_COLOR_PRI_BT709 &&
......
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