46 lines
1.2 KiB
Bash
Executable file
46 lines
1.2 KiB
Bash
Executable file
#!/bin/sh
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# This took me far too long to figure out how to do but
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# I think I've learned a lot from it. What a great exercise!
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# These comments are for my future-self and whomever else.
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# -- Siina, 2020.11.09
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#
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# Requirements:
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# - alsa-utils
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# - libv4l (brought in by USE=v4l)
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# - mpv
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#
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# Tools I used to figure this shit out
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# - arecord, aplay
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# - ffmpeg
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# - lspci
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# - Lots of searching through ancient fragments of the 'net
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#
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# TODO:
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# - Capture the exact PIDs of the launched mpv / alsaloop to prevent
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# shutting down any other loops / mpv that happen to be open
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# Set our device to 1080p otherwise it defaults to 480p
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v4l2-ctl --set-fmt-video=width=1920,height=1080
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# Connect to capture card and display captured images immediately
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# Send to background so we can initiate the loop below
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mpv --title="Capture Card" av://v4l2:/dev/video0 --profile=low-latency --untimed &
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# Run a loop for the capture card digital audio to be sent to my desktop audio
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while :
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do
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alsaloop -C hw:2,0 -P hw:1,0 &
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if [[ $(pgrep -f alsaloop) -gt 0 ]]; then
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break
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fi
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done
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# Watch for mpv to exit
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while pgrep -f mpv >/dev/null; do
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sleep 3
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continue
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done
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# Kill the alsaloop when mpv exits, then terminate this script
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kill -9 $(pgrep -f alsaloop)
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exit
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