From 32f86ce276bad32ded0a5b5623c6c400a00deb3a Mon Sep 17 00:00:00 2001 From: paulwilkins Date: Tue, 9 Jan 2018 15:51:28 +0000 Subject: [PATCH] Add zoom break out for kf boost loop. Adds a breakout threshold to key frame boost loop. This reduces the boost somewhat in cases where there is a significant zoom component. In tests most clips no effect but a sizable gain for some clips like station. Change-Id: I8b7a4d57f7ce5f4e3faab3f5688f7e4d61679b9a --- vp9/encoder/vp9_firstpass.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/vp9/encoder/vp9_firstpass.c b/vp9/encoder/vp9_firstpass.c index fb6b132..0c5cd97 100644 --- a/vp9/encoder/vp9_firstpass.c +++ b/vp9/encoder/vp9_firstpass.c @@ -2815,6 +2815,7 @@ static int test_candidate_kf(TWO_PASS *twopass, #define FRAMES_TO_CHECK_DECAY 8 #define MIN_KF_TOT_BOOST 300 #define KF_BOOST_SCAN_MAX_FRAMES 32 +#define KF_ABS_ZOOM_THRESH 6.0 #ifdef AGGRESSIVE_VBR #define KF_MAX_FRAME_BOOST 80.0 @@ -2842,6 +2843,7 @@ static void find_next_key_frame(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) { double kf_group_err = 0.0; double recent_loop_decay[FRAMES_TO_CHECK_DECAY]; double sr_accumulator = 0.0; + double abs_mv_in_out_accumulator = 0.0; const double av_err = get_distribution_av_err(cpi, twopass); vp9_zero(next_frame); @@ -3021,7 +3023,14 @@ static void find_next_key_frame(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) { KF_MAX_FRAME_BOOST * zm_factor); boost_score += frame_boost; - if (frame_boost < 25.00) break; + + // Measure of zoom. Large zoom tends to indicate reduced boost. + abs_mv_in_out_accumulator += + fabs(next_frame.mv_in_out_count * next_frame.pcnt_motion); + + if ((frame_boost < 25.00) || + (abs_mv_in_out_accumulator > KF_ABS_ZOOM_THRESH)) + break; } else { break; } -- 2.7.4