ref: c30a9cd97dbeee9cdd18527e9571304cb01d0073
parent: f30b323180c3c358b646414f79f33da5664eeccb
author: Paul Wilkins <paulwilkins@google.com>
date: Thu Feb 13 09:50:55 EST 2014
Remove some cases for turning off arf. Flipping arf on and off too often is hurting some clips. This change makes no difference for 50-75% of our test clips but helps some by a big margin. (eg. std-hd crew by 6% and one of the YT and YT-hd clips by 14%) Average improvements for 2 pass, speed 2 (psnr,ssim) are as follows:- derf 0.165%, 0.210% yt 1.210%, 1.464% yt-hd 1.189%, 1.471% std-hd 1.031%, 0.886% Change-Id: I121fe66cfb4a62d384b23b484a7d648789641969
--- a/vp9/encoder/vp9_firstpass.c
+++ b/vp9/encoder/vp9_firstpass.c
@@ -1566,13 +1566,7 @@
(i >= MIN_GF_INTERVAL) &&
// for real scene cuts (not forced kfs) dont allow arf very near kf.
(rc->next_key_frame_forced ||
- (i <= (rc->frames_to_key - MIN_GF_INTERVAL))) &&
- ((next_frame.pcnt_inter > 0.75) ||
- (next_frame.pcnt_second_ref > 0.5)) &&
- ((mv_in_out_accumulator / (double)i > -0.2) ||
- (mv_in_out_accumulator > -2.0)) &&
- (boost_score > 100)) {-
+ (i <= (rc->frames_to_key - MIN_GF_INTERVAL)))) {// Alternative boost calculation for alt ref
rc->gfu_boost = calc_arf_boost(cpi, 0, (i - 1), (i - 1), &f_boost,
&b_boost);
--
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