)]}'
{
  "commit": "9a9dd27f91e0271b595fc766f668854aa884fab7",
  "tree": "6caa9cef7cdfe7a08f04f02cbc99762ebab69e8f",
  "parents": [
    "3f9c45d24b9dde7960af758189550546d53b23b3"
  ],
  "author": {
    "name": "Jingning Han",
    "email": "jingning@google.com",
    "time": "Wed Jul 31 21:18:40 2019 -0700"
  },
  "committer": {
    "name": "Jingning Han",
    "email": "jingning@google.com",
    "time": "Thu Aug 15 18:30:34 2019 +0000"
  },
  "message": "Use top-down GOP rate allocation\n\nSimplify the GOP rate allocation logic. Use a top-down frame rate\nallocation approach. Decide the ARFs frame size from base layer\ntowards higher layers using the arf boost factor. The vbr coding\nperformance for low/mid res set remains neutral. It helps the ugc\nset a bit more since the clips are less stationary than standard\ntest sets. Tested in speed 1 with 150 frames, the vbr coding stats\nare changed:\n\n     avg PSNR    overall PSNR    SSIM    PSNR-HVS\nlow  -0.07%        -0.04%        0.04%    -0.11%\nmid  -0.04%        -0.04%        0.10%    -0.12%\nugc  -0.21%        -0.23%       -0.06%    -0.32%\n\nSTATS_CHANGED\n\nChange-Id: I992cea228a57d162428edf8d7f400ea9421cd2cb\n",
  "tree_diff": [
    {
      "type": "modify",
      "old_id": "1cc676dbb217e2411fcb29a7d6531fbd7af0e6b2",
      "old_mode": 33188,
      "old_path": "av1/encoder/gop_structure.c",
      "new_id": "df0001bb587691d2212c1ebe3367d7886d4ac8e8",
      "new_mode": 33188,
      "new_path": "av1/encoder/gop_structure.c"
    },
    {
      "type": "modify",
      "old_id": "8d229c3448236ed9e406702f9fdc939c6a2e97d6",
      "old_mode": 33188,
      "old_path": "av1/encoder/pass2_strategy.c",
      "new_id": "5bb590da15fff205fad6564eddf73753ae4b777c",
      "new_mode": 33188,
      "new_path": "av1/encoder/pass2_strategy.c"
    }
  ]
}