shithub: libvpx

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vp9: Some adjustments to scene-cut detection.

Change only affects 1 pass vbr mode, speed >=5.
Increase min_thresh, decrease boost, and set a min/max
value for gf_interval.

Change-Id: I9c1e1a1ab0c5780064eb62714ee39a72ea4d2107

--- a/vp9/encoder/vp9_ratectrl.c

+++ b/vp9/encoder/vp9_ratectrl.c

@@ -2048,7 +2048,7 @@

     // for cases where there is small change from content that is completely

     // static.

     if (cpi->oxcf.rc_mode == VPX_VBR) {

-      min_thresh = 30000;

+      min_thresh = 40000;

       thresh = 2.0f;

     }

     if (avg_sad >

@@ -2062,14 +2062,15 @@

     // For VBR, under scene change/high content change, force golden refresh.

     if (cpi->oxcf.rc_mode == VPX_VBR &&

         rc->high_source_sad &&

-        cpi->refresh_golden_frame == 0 &&

         cpi->ext_refresh_frame_flags_pending == 0) {

       int target;

       cpi->refresh_golden_frame = 1;

+      rc->gfu_boost = DEFAULT_GF_BOOST >> 1;

+      rc->baseline_gf_interval = VPXMIN(20,

+          VPXMAX(10, rc->baseline_gf_interval));

       rc->frames_till_gf_update_due = rc->baseline_gf_interval;

       if (rc->frames_till_gf_update_due > rc->frames_to_key)

         rc->frames_till_gf_update_due = rc->frames_to_key;

-      rc->gfu_boost = DEFAULT_GF_BOOST;

       target = calc_pframe_target_size_one_pass_vbr(cpi);

       vp9_rc_set_frame_target(cpi, target);

     }