diff --git a/video/filter/vf_divtc.c b/video/filter/vf_divtc.c
index 5b57e5a4cb..b4718b355f 100644
--- a/video/filter/vf_divtc.c
+++ b/video/filter/vf_divtc.c
@@ -202,8 +202,9 @@ static int imgop(int(*planeop)(unsigned char *, unsigned char *,
        int sum = 0;
        for (int p = 0; p < dst->num_planes; p++) {
            sum += planeop(dst->planes[p], src ? src->planes[p] : NULL,
-                          dst->w * (dst->fmt.bpp[p] / 8), dst->plane_h[p],
-                          dst->stride[p], src ? src->stride[p] : 0, arg);
+                          (dst->w * dst->fmt.bytes[p]) >> dst->fmt.xs[p],
+                          dst->plane_h[p], dst->stride[p],
+                          src ? src->stride[p] : 0, arg);
        }
        return sum;
    }
diff --git a/video/filter/vf_phase.c b/video/filter/vf_phase.c
index 45d5e4ae44..0b31ede5e5 100644
--- a/video/filter/vf_phase.c
+++ b/video/filter/vf_phase.c
@@ -205,7 +205,7 @@ static struct mp_image *filter(struct vf_instance *vf, struct mp_image *mpi)
 
    int pw[MP_MAX_PLANES] = {0};
    for (int p = 0; p < mpi->num_planes; p++)
-       pw[p] = (mpi->w * mpi->fmt.bpp[p] + 7) / 8;
+       pw[p] = ((mpi->w * mpi->fmt.bpp[p] + 7) / 8) >> mpi->fmt.xs[p];
 
    mode=vf->priv->mode;