static int vf_open(vf_instance_t *vf, char *args) { vf->config=config; vf->query_format=query_format; vf->put_image=put_image; vf->uninit=uninit; vf->priv = calloc(1, sizeof (struct vf_priv_s)); vf->priv->skipline = 0; vf->priv->scalew = 1; vf->priv->scaleh = 2; if (args) sscanf(args, "%d:%d:%d", &vf->priv->skipline, &vf->priv->scalew, &vf->priv->scaleh); return 1; }