if (x4->noise_reduction >= 0)
x4->params.analyse.i_noise_reduction = x4->noise_reduction;
if (avctx->me_subpel_quality >= 0)
x4->params.analyse.i_subpel_refine = avctx->me_subpel_quality;
if (x4->noise_reduction >= 0)
x4->params.analyse.i_noise_reduction = x4->noise_reduction;
if (avctx->me_subpel_quality >= 0)
x4->params.analyse.i_subpel_refine = avctx->me_subpel_quality;