Is this log means video being hw decoded?

[TheDreadPirate]

Probably because you checked this box.

   

I can't remember the reason, but it is better to have that box checked.  If you look in the rest of the ffmpeg command you will see QSV used for actual encoding.

Code:

-vf "setparams=color_primaries=bt709:color_trc=bt709:colorspace=bt709,scale_vaapi=w=720:h=404:format=nv12:extra_hw_frames=24,hwmap=derive_device=qsv,format=qsv"

Code:

-codec:v:0 hevc_qsv