help required with hevc_nvenc

Questions involving a Windows version of FFmpeg.
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PieCaptain
Posts: 8
Joined: Thu Oct 13, 2016 9:46 am

help required with hevc_nvenc

Post by PieCaptain » Tue Feb 26, 2019 1:10 pm

Hi!
I recently bought an Nvideo 1060Ti and switched from using libx265 to hevc_nvenc

the only thing in my command that has changed is the videocodec which i set using a variable (in powershell)

Code: Select all

&$ffmpeg -i $Inputfile -c:v $VideoCodec -c:a aac - map 0:v:0 -map 0:a:$BAT -sn $Output
($BAT is the audio track number to use)

anyway, since switching to hevc_nvenc and the 1060Ti my conversions are faster, but the output files are also a lot bigger.

What can I do to get faster encoding with hevc_nvenc, but at the same size output as when using libx265?

Thanks in advance!

Paul

pandy
Posts: 184
Joined: Mon Feb 24, 2014 1:46 pm

Re: help required with hevc_nvenc

Post by pandy » Fri Mar 01, 2019 8:02 pm

Not much, HW encoders deliver worse quality at the same bitrate, if you are interested in similar quality as x265 then you must accept increase of bitrate - probably about 20 - 30% more than x265.

btw - video codec need to be configured - you didn't provided any video codec configuration thus it is very difficult to say something.

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