42 lines
1.5 KiB
Plaintext
42 lines
1.5 KiB
Plaintext
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#!/bin/bash
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# Record a few seconds of system audio, and save. Intended to seamlessly record
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# audio for anki cards, while watching anime. MacOS only
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#
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# May require changing capture device. Find available options with:
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# $ ffmpeg -f avfoundation -list_devices true -i ""
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# Change the number in the ffmpeg argument to desired device. BlackHole-2ch is
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# recommended for recording macos system audio. Make sure vlc's output device
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# is an aggregate of BlackHole-2ch and the speakers
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#
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# External dependencies: ffmepg, BlackHole-2ch
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if [[ $(uname) != 'Darwin' ]]; then
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printf 'This is meant for MacOS\nAborting...\n'
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exit 1
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fi
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recording_name="$(date +'%m_%d_%Y-%H_%M_%S' | awk '{printf("%s%s", $0, ".mp3")}')"
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mkdir -p ~/Desktop/anki_recordings
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ffmpeg \
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-f avfoundation \
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-i ":2" -filter:a "atempo=0.95" \
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-t "${1:-6}" \
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~/"Desktop/anki_recordings/${recording_name}"
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unset recording_name
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# Further reference ====
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# Rec audio with ffmpeg
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# https://apple.stackexchange.com/questions/326388/terminal-command-to-record-audio-through-macbook-microphone
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#
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# With vlc? Wouldn't require BlackHole-2ch this way
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# https://forum.videolan.org/viewtopic.php?t=87923
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#
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# Trim on the fly? Save a unix timestamp in a file, then have ffmpeg trim the
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# recording based on the time in the file. Use a second hotkey to edit the
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# file's time with the current timestamp. Default should be +10s from start
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# https://unix.stackexchange.com/questions/182602/trim-audio-file-using-start-and-stop-times
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# ex: set syntax=bash:ff=unix:
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