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| author | Marco <marpan@google.com> | 2017-04-12 17:06:03 -0700 |
|---|---|---|
| committer | Marco <marpan@google.com> | 2017-04-13 11:44:35 -0700 |
| commit | 6bff6cb5a9efe88c2cbe2c5f967560f68ee3ce29 (patch) | |
| tree | b762c22d2cc977991361380166f38efce3e02886 | |
| parent | f22b828d685adee4c7a561990302e2d21b5e0047 (diff) | |
| download | libvpx-6bff6cb5a9efe88c2cbe2c5f967560f68ee3ce29.tar libvpx-6bff6cb5a9efe88c2cbe2c5f967560f68ee3ce29.tar.gz libvpx-6bff6cb5a9efe88c2cbe2c5f967560f68ee3ce29.tar.bz2 libvpx-6bff6cb5a9efe88c2cbe2c5f967560f68ee3ce29.zip | |
vp9: 1 pass VBR: Fix to rate control at low min-q.
Fix to avoid getting stuck at very low Q even
though content is changing, which can happen for --min-q=0.
Fix is to more aggressively increase active_worst_quality
when detecting significant rate_deviation at very low Q.
Change will only affect 1 pass VBR for --min-q < 4, so no
change in ytlive metrics for --min-q >= 4.
Change-Id: I4dd77dd7c08a30a4390da0ff2c8bda6fccfa76d7
| -rw-r--r-- | vp9/encoder/vp9_ratectrl.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/vp9/encoder/vp9_ratectrl.c b/vp9/encoder/vp9_ratectrl.c index f79b7c6fc..b1866cd8a 100644 --- a/vp9/encoder/vp9_ratectrl.c +++ b/vp9/encoder/vp9_ratectrl.c @@ -2172,6 +2172,11 @@ void adjust_gf_boost_lag_one_pass_vbr(VP9_COMP *cpi, uint64_t avg_sad_current) { if (rate_err < 2.0 && !high_content) { rc->fac_active_worst_inter = 120; rc->fac_active_worst_gf = 90; + } else if (rate_err > 8.0 && rc->avg_frame_qindex[INTER_FRAME] < 16) { + // Increase active_worst faster at low Q if rate fluctuation is high. + rc->fac_active_worst_inter = 200; + if (rc->avg_frame_qindex[INTER_FRAME] < 8) + rc->fac_active_worst_inter = 400; } if (low_content && rc->avg_frame_low_motion > 80) { rc->af_ratio_onepass_vbr = 15; |