tree c9edb65e433dc4da7c74a0ddebee7c0b69ff180a
parent e251a33c382bb5af1105be7ea97ae59668b26aff
author Urvang Joshi <urvang@google.com> 1572656360 -0700
committer Urvang Joshi <urvang@google.com> 1573175733 +0000

Superres: Add a flag for exhaustive search

When SUPERRES_RECODE_ALL_RATIOS is on, we try all possible denominators
for all frames (except overlay and internal overlay frames) in
SUPERRES_AUTO mode. (Off by default).

The purpose of the flag is to find out the maximum possible gains from superres
with best strategy of picking superres denominators.

BDRate (PSNR) on hdres at low bitrates
(baseline = fullres, test = SUPERRES_AUTO with SUPERRES_RECODE_ALL_RATIOS
on):

Overall: -0.977

sunflower_720p25.y4m  -9.032
night_720p30.y4m  -7.556
factory_1080p30.y4m -3.745
cyclists_720p30.y4m -3.745
ped_1080p25.y4m -3.172
stockholm_ter_720p60.y4m  -2.613
crew_720p30.y4m -2.501
basketballdrive_1080p50.y4m -2.501
city_720p30.y4m -2.203
tennis_1080p24.y4m  -1.604
shields_720p50.y4m  -1.359
in_to_tree_1080p50.y4m  -1.351
kimono1_1080p24.y4m -1.106
parkrun_720p50.y4m  -0.743
dinner_1080p30.y4m  -0.571

Change-Id: I0dd8d3112bb81783457672b59105b352cf28ace5