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  1. Member
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    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:
    Image Attached Files
    Last edited by Abdler; 17th Nov 2019 at 11:43.
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  2. Member
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    Can anyone create a higher quality output file from this source file???
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  3. 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
    users currently on my ignore list: deadrats, Stears555
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