commit 97c93776bbff4d01a7c5c97fef5db3f4c426ce96
author Yu-Chen (Eric) Sun <ycsun@fb.com> Fri Mar 31 13:25:48 2023 -0700
committer Marco Paniconi <marpan@google.com> Sat Apr 01 05:50:04 2023 +0000
tree 79713c4cc105f138d2bb1e4265b420ca19782de5
parent da193d53822b790ea0d36e38276de0f8cca01c95

Remove first frames' quality boosting

Remove the code forcing the first few frames to use low q.

This improves the overshoot issue when the encoder is initialized.

Change-Id: I6969a56b091045166070979183d247c244b33240

av1/encoder/ratectrl.c

diff --git a/av1/encoder/ratectrl.c b/av1/encoder/ratectrl.c
index 47d74ec..8bdbe17 100644
--- a/av1/encoder/ratectrl.c
+++ b/av1/encoder/ratectrl.c
@@ -1239,15 +1239,6 @@
       q = *top_index;
   }
 
-  // Special case: we force the first few frames to use low q such that
-  // these frames are encoded at a high quality, which provides good
-  // references for following frames.
-  if (current_frame->frame_type != KEY_FRAME && !cpi->ppi->use_svc &&
-      current_frame->frame_number >= 10 && current_frame->frame_number <= 15) {
-    q = AOMMIN(p_rc->last_kf_qindex + 108, AOMMAX(5, q - 9));
-    q = AOMMIN(rc->worst_quality, AOMMAX(q, rc->best_quality));
-  }
-
   assert(*top_index <= rc->worst_quality && *top_index >= rc->best_quality);
   assert(*bottom_index <= rc->worst_quality &&
          *bottom_index >= rc->best_quality);