From dd3d08f0c227ebe08b445801eeb38d39cc06f377 Mon Sep 17 00:00:00 2001 From: Marco Paniconi Date: Sun, 24 Jun 2018 21:44:29 -0700 Subject: [PATCH] vp9: Add lower Q limt to cyclic refresh usage. Disable the cyclic refresh for very low average Q. This reduces encoded bitrate for static slides after the the quality has ramped up well enough (low Q). And as the cyclic refresh is not needed at low Q in most cases, this has minimal/no effect on quality on RTC set. Change-Id: Id6d449aa2351bb6886d72aafb2d406e967ed2789 --- vp9/encoder/vp9_aq_cyclicrefresh.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/vp9/encoder/vp9_aq_cyclicrefresh.c b/vp9/encoder/vp9_aq_cyclicrefresh.c index f47da2fa4..e11c94932 100644 --- a/vp9/encoder/vp9_aq_cyclicrefresh.c +++ b/vp9/encoder/vp9_aq_cyclicrefresh.c @@ -427,9 +427,11 @@ void vp9_cyclic_refresh_update_parameters(VP9_COMP *const cpi) { double weight_segment_target = 0; double weight_segment = 0; int thresh_low_motion = (cm->width < 720) ? 55 : 20; + int qp_thresh = VPXMIN(20, rc->best_quality << 1); cr->apply_cyclic_refresh = 1; if (cm->frame_type == KEY_FRAME || cpi->svc.temporal_layer_id > 0 || is_lossless_requested(&cpi->oxcf) || + rc->avg_frame_qindex[INTER_FRAME] < qp_thresh || (cpi->use_svc && cpi->svc.layer_context[cpi->svc.temporal_layer_id].is_key_frame) || (!cpi->use_svc && rc->avg_frame_low_motion < thresh_low_motion && -- 2.50.0