Invitation to competition! Best possible encoder settings for HEVC TURING.

[Abdler]

Hello VP members!


Here is the original sample file:

https://sendgb.com/HxROXQD6ywU



The output file must be around 2500 Kilobit/sec in NVENC HEVC compression.

The Contest:

Can anybody make higher quality NVENC video with this bitrate?

My Settings: (the audio was ignored / not present in the transcoded video)



Settings:
NVEnc --avhw -i -INPUT- --fps 23.976 --codec h265 --profile main10 --level auto --tier high --sar 1:1 --lookahead 32 --output-depth 10 --vbrhq 2500 --max-bitrate 240000 --aq --aq-strength 8 --gop-len 600 --strict-gop --no-i-adapt --ref 7 --multiref-l0 7 --multiref-l1 7 --nonrefp --bframes 3 --bref-mode disabled --no-b-adapt --mv-precision Q-pel --cu-max 32 --cu-min 8 --preset quality --colormatrix bt709 --vpp-resize default --output-res 1920x1080 --vpp-gauss disabled --cuda-schedule sync --keyfile GENERATED_KEY_FILE --output "C:\AppData\Local\Temp\555.265"


My transcoded file is here: https://sendgb.com/31UsgYBHMf8

or here:

[Abdler]

Can anyone create a higher quality output file from this source file???

[Selur]

not really using NVEnC much, but here are some obvious things taking into account how MPEG compression works:
a. using 'open gop' should allow the encoder to produce better quality than closed gop
b. 'adaptive b-frame placement' should allow the the encoder to produce better quality than fixed b-frame placement
c. using 'temporal' adaptive quantization should allow the the encoder to produce better quality than when using spacial adaptive quantization (depending on the source strength 8 might be too high)
d. 'adaptive I-frame placement' should allow the encoder to produce better quality than when using a static I-frame placement
e. no using 'Key frames for chapters' should allow the encoder to produce better quality than when enforcing key frames at specific locations to help navigation