tree 28687b17327ed942cebf9e4bc901486df2d726fe
parent 1ab085239f9fb7194b7c9943bbc5a679bdc0a313
author Yunqing Wang <yunqingwang@google.com> 1634099694 -0700
committer Yunqing Wang <yunqingwang@google.com> 1634152919 +0000

rtc: Adjust gf length for speed >= 9

This CL continued the work in
https://aomedia-review.googlesource.com/c/aom/+/147006
At real time speed 9 and 10, due to the deep optimizations, using
avg_frame_low_motion to represent high or low motion wasn't accurate
anymore. To compensate for that, we lowered the gf length at these
speeds.

Overall performance got slightly better (see below), and coding
performance of jimredvga_25fps.y4m was improved by 3.67% - 3.96%.
          avg_psnr:  ovr_psnr:  ssim:  encoder speed:
speed 9:
rtc:       -0.065     -0.059    -0.009   -0.067
speed 10:
rtc:       -0.104     -0.084    -0.074   -0.036

STATS_CHANGED

Change-Id: I561ad8914efd8a0c5231c40871d32dca6c7ad5fe