tree 247d9ac1cb6be7dcfe497c814a11714a76ed4747
parent b4fd482a436e7f3b38284aa649c931aae916cb06
author Marco Paniconi <marpan@google.com> 1607019767 -0800
committer Marco Paniconi <marpan@google.com> 1607040792 +0000

rtc: Use zeromv mode for speed >= 9

Use mode set with zeromv (via globalmv) forr speed >= 9,
for content with low motion. Also reduce threshold for
update of avg_frame_low_motion: this threshold change
is neutral bdrate but reduces max regression when using
zeromv.

bdrate gain on rtc set for speed 9:
avg gain ~0.62%, max gain ~3.2%, max regression ~1.4%.
No change in speed observed.

Change-Id: Icc993e2444444cb13c1f7fef271ca2f1349381a7