shithub: libvpx

Info  •  Files  •  Log  •  Branches

Adjust threshold in scene detection

For 1 pass vbr: increase min_thresh slightly, and also add
condition on golden/arf update for using full nonrd_pick_partition.

Reduces possible false detection for scene cut detection.

Neutral/small change in metrics or speed for speed 5.

Change-Id: I388f4d9a56e3cc763e0148338c1bc0381e58ad76

--- a/vp9/encoder/vp9_encodeframe.c

+++ b/vp9/encoder/vp9_encodeframe.c

@@ -4216,7 +4216,8 @@

         // nonrd_pick_partition does not support 4x4 partition, so avoid it

         // on key frame for now.

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

-             cpi->oxcf.speed < 6 && cm->frame_type != KEY_FRAME)) {

+             cpi->oxcf.speed < 6 && cm->frame_type != KEY_FRAME &&

+             (cpi->refresh_golden_frame || cpi->refresh_alt_ref_frame))) {

           // Use lower max_partition_size for low resoultions.

           if (cm->width <= 352 && cm->height <= 288)

             x->max_partition_size = BLOCK_32X32;

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

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

@@ -2280,7 +2280,7 @@

     uint32_t min_thresh = 4000;

     float thresh = 8.0f;

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

-      min_thresh = 60000;

+      min_thresh = 70000;

       thresh = 2.1f;

     }

     if (cpi->oxcf.lag_in_frames > 0) {