From: Marco Paniconi <marpan@google.com>
Date: Wed, 13 May 2020 22:08:15 +0000 (-0700)
Subject: vp9-rtc: Increase thresh for scene detection
X-Git-Tag: v1.9.0-rc1~16
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=1243d2fc27b1cad8863ac2d688b4fde71a80a74d;p=libvpx

vp9-rtc: Increase thresh for scene detection

For CBR screen content mode. Makes it more
robust to false detections.

Change-Id: Icad89adb6f79b530b589bba2c71ba88ee5088d37
---

diff --git a/vp9/encoder/vp9_ratectrl.c b/vp9/encoder/vp9_ratectrl.c
index 5dd745f3a..4da50379b 100644
--- a/vp9/encoder/vp9_ratectrl.c
+++ b/vp9/encoder/vp9_ratectrl.c
@@ -2960,7 +2960,7 @@ void vp9_scene_detection_onepass(VP9_COMP *cpi) {
     int scene_cut_force_key_frame = 0;
     int num_zero_temp_sad = 0;
     uint64_t avg_sad_current = 0;
-    uint32_t min_thresh = 10000;
+    uint32_t min_thresh = 20000;  // ~5 * 64 * 64
     float thresh = 8.0f;
     uint32_t thresh_key = 140000;
     if (cpi->oxcf.speed <= 5) thresh_key = 240000;