Hardware accelerated encoding

FFmpeg wiki

ffmpeg -hwaccel vaapi -hwaccel_device /dev/dri/renderD128 \
-hwaccel_output_format vaapi -i input.mp4 -c:v av1_vaapi \
-vf 'scale_vaapi=w=1280:h=720' -b:v 20M -y out.webm
Codec “-c:v” parameter value
AV1 av1_vaapi
HEVC hevc_vaapi
H264 h264_vaapi