ffmpeg -y \
-f x11grab -video_size 1280x720 -framerate 30 -show_region 1 -i :0.0+0,49 \
-f v4l2 -s 320x180 -r 10 -i /dev/video0 \
-filter_complex overlay=main_w-overlay_w:main_h-overlay_h \
-f pulse -ac 1 -itsoffset 4.5 -i alsa_input.usb-046d_0825_3950EF10-02-U0x46d0x825.analog-mono \
-f pulse -ac 2 -ss 3 -i alsa_output.pci-0000_00_14.2.analog-stereo.monitor \
-filter_complex amix=inputs=2 \
-vcodec libx264 -preset ultrafast -maxrate 2300k -bufsize 2300k -g 60 \
-acodec libfdk_aac -ar 44100 -ab 64k \
-f flv test.flv