)]}'
{
  "commit": "c3571bc88feb570d4199638ecdc18976eebcaf7d",
  "tree": "7f1fec53fbfad6c7669daa65280cdec93e870a10",
  "parents": [
    "4c10a3c287f34bde40e6c846c3d03a6f5d90bed8"
  ],
  "author": {
    "name": "Zoe Liu",
    "email": "zoeliu@google.com",
    "time": "Mon Feb 27 16:52:12 2017 -0800"
  },
  "committer": {
    "name": "Yaowu Xu",
    "email": "yaowu@google.com",
    "time": "Fri Apr 14 18:28:44 2017 +0000"
  },
  "message": "Adjust encoder rate allocations for ext-refs\n\nThis CL is targeted to improve the objective/subjective quality of the\n\"ext-refs\" coding tool.\n\nTuned the frame rate factors as follows:\n\n(1) BRF_UPDATE:\n    Decreased from INTER_HIGH (1.5) to GF_ARF_LOW (1.25);\n(2) Both LAST_BIPRED_UPDATE and BIPRED_UPDATE:\n    Increased from INTER_LOW (0.80) to INTER_NORMAL (1.00)\n, which is to reduce the bits allocated to the BWEDREF frame whereas\nto increase the bits allocated to the bi-directionally predicted\nframes.\n\nObtained a coding gain in overall PSNR as follows, compared against\nthe original ext-refs:\n\nlowres: BDRate -0.181%\nmidres: BDRate -0.090%\nhdres:  BDRate -0.701%\n\nChange-Id: Id001f3b124d833da9f80eba4cdec2ca3f6ba9d82\n",
  "tree_diff": [
    {
      "type": "modify",
      "old_id": "fa116d70f5bba4eaad7518d4ef75d0ff59a13461",
      "old_mode": 33188,
      "old_path": "av1/encoder/firstpass.c",
      "new_id": "1fe4e53eb797d54b7eb944cbdd8185db301ec223",
      "new_mode": 33188,
      "new_path": "av1/encoder/firstpass.c"
    }
  ]
}