Best FFmpeg command for downscaling h264 video from 2160p 1080p?

[jorax68528]

As title says, I need to downscale 4K video to FHD retaining as much quality as possible, what command should I use to achieve this?

[davexnet]

Why don't you just use one of the x264/x265 GUI's and use one of their presets?

[jagabo]

ffmpeg -i input.mp4 -vf scale=w=1920:h=1080 -c:v libx264 -x264opts qp=0 -c:a copy output.mp4

[jorax68528]

ffmpeg -i input.mp4 -vf scale=w=1920:h=1080 -c:v libx264 -x264opts qp=0 -c:a copy output.mp4

ty