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Init static_scene_max_gf_interval in vp9_rc_init()

Change-Id: I2cad885fac2fd5f3e84d02b905a2ce59eb66760e

--- a/vp9/encoder/vp9_firstpass.c

+++ b/vp9/encoder/vp9_firstpass.c

@@ -3771,7 +3771,6 @@

   int show_idx = 0;

   int last_gop_use_alt_ref = 0;

   vp9_rc_init(oxcf, 1, &rc);

-  rc.static_scene_max_gf_interval = 250;

   while (show_idx < first_pass_info->num_frames) {

     int use_alt_ref;

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

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

@@ -431,6 +431,11 @@

     rc->max_gf_interval = vp9_rc_get_default_max_gf_interval(

         oxcf->init_framerate, rc->min_gf_interval);

   rc->baseline_gf_interval = (rc->min_gf_interval + rc->max_gf_interval) / 2;

+  if ((oxcf->pass == 0) && (oxcf->rc_mode == VPX_Q)) {

+    rc->static_scene_max_gf_interval = FIXED_GF_INTERVAL;

+  } else {

+    rc->static_scene_max_gf_interval = MAX_STATIC_GF_GROUP_LENGTH;

+  }

   rc->force_max_q = 0;

   rc->last_post_encode_dropped_scene_change = 0;