shithub: libvpx

Download patch

ref: bc066684ca4deff24d02ee56071d731b431bf438
parent: 129e6fe52463d192f6b48f7d42ac4a3a93c61f3b
author: Marco Paniconi <marpan@google.com>
date: Wed Oct 3 11:25:32 EDT 2018

vp8: Increase rate threshold for overshoot-drop

Increase the rate threshold for the dropping when
overshoot is detected during encoding. This helps
to prevent some unneccessary drops for hard content.

Change-Id: I258bf33883d46347efd44e1e192cb25c444d05fe

--- a/vp8/encoder/ratectrl.c
+++ b/vp8/encoder/ratectrl.c
@@ -1474,7 +1474,7 @@
     // QP threshold: only allow dropping if we are not close to qp_max.
     int thresh_qp = 3 * cpi->worst_quality >> 2;
     // Rate threshold, in bytes.
-    int thresh_rate = 2 * (cpi->av_per_frame_bandwidth >> 3);
+    int thresh_rate = 3 * (cpi->av_per_frame_bandwidth >> 3);
     // Threshold for the average (over all macroblocks) of the pixel-sum
     // residual error over 16x16 block.
     int thresh_pred_err_mb = (200 << 4);