#!/bin/sh
# This took me far too long to figure out how to do but 
# I think I've learned a lot from it. What a great exercise!
# These comments are for my future-self and whomever else.
# -- Siina, 2020.11.09
#
# Requirements:
# - alsa-utils
# - libv4l (brought in by USE=v4l)
# - mpv
#
# Tools I used to figure this shit out
# - arecord, aplay
# - ffmpeg
# - lspci
# - Lots of searching through ancient fragments of the 'net
#
# TODO:
# - Capture and retry to connect audio

# Set our device to 1080p otherwise it defaults to 480p
v4l2-ctl --set-fmt-video=width=1920,height=1080

# Connect to capture card and display captured images immediately
# Send to background so we can initiate the loop below
mpv av://v4l2:/dev/video0 --profile=low-latency --untimed &

# audio can't connect until video is established due to a constant
# powercycle when inactive, likely due to lack of proper driver
sleep 3

# Run a loop for the capture card digital audio to be sent to my desktop audio
alsaloop -C hw:2,0 -P hw:1,0

# Let's exit this shit when done
exit