Talk recording

ffmpeg.sh

#!/usr/bin/bash

ffmpeg \
    -f alsa -sample_rate 44100 -thread_queue_size 1024 -itsoffset -0.5 -i hw:0 \
    -f x11grab -r 30 -thread_queue_size 1024 -i :0.0 \
    -f v4l2 -r 30 -video_size 320x180 -thread_queue_size 1024 -i /dev/video0 \
    -filter_complex "
        [1:v]scale=1920x1080[slides];
        [slides][2:v]overlay=x=1580:y=20
    " \
    -preset ultrafast \
    output.mp4