ffmpeg-av1 -i Video.mp4 -preset 8 -b:a 96k -c:v libsvtav1 -c:a opus -strict -2 -y video-av1.mp4

Here is another command with better encoding.

ffmpeg-av1 -i Video.mp4 -c:v libsvtav1 -preset 6 -crf 28 -g 240 -pix_fmt yuv420p10le -svtav1-params tune=0:film-grain=10: -c:a opus -b:a 100k -strict -2 video-av1.mp4