video_record_webcam.sh

# records from the webcam and my bass pedal
ffmpeg -f v4l2 -thread_queue_size 512 -i /dev/video0 -thread_queue_size 512 \
  -f alsa -i hw:1,0 -c:v copy -c:a copy \
  ${HOME}/Videos/$(date +%Y%m%d%H%M)_record.mkv
# ffmpeg -f v4l2 -thread_queue_size 512 -i /dev/video0 \
#   -thread_queue_size 512 \
#   -f alsa -i hw:1,0 \
#   -vcodec libx264 -x264opts keyint=60:no-scenecut -preset fast \
#   -q:v 4 -s 640x480 -r 30 /
#   -acodec libmp3lame -q:a 7 -channels 2 \
#   ${HOME}/Videos/$(date +%Y%m%d%H%M)_record.mkv

# Get an external camera to be seen as a webcam:
# gphoto2 --stdout --capture-movie | ffmpeg -i - -c:v rawvideo -pix_fmt yuyv422 -deinterlace -threads 0 -f v4l2 /dev/video2