38 lines
1.1 KiB
Bash
Executable File
38 lines
1.1 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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# - libv4l (brought in by USE=v4l)
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# - mpv
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# - pulseaudio
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## 0 - Find input and output sources with pactl
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input="alsa_input.usb-AVerMedia_AVerMedia_USB_Device_52030300003520-02.iec958-stereo"
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output="alsa_output.pci-0000_0b_00.4.analog-stereo"
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## 1 - Configure video
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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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## 2 - Launch viewer
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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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## 3 - Connect audio, send to background for loop
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pacat -r --latency-msec=1 -d $input | pacat -p --latency-msec=1 -d $output &
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## 4 - Cleanup
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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 pacat since it's not needed
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kill -9 $(pgrep -f pacat)
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exit
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