squint - a bash script for cygwin to rip audio tracks from YouTube video files wihtout transcoding

squint.sh

#!/usr/bin/bash
# Licensed under any of GPLv2, MIT, and BSD 2-clause licenses

FFDIR=`cygpath -u $USERPROFILE`"/bin/ffmpeg/bin"
infile=`cygpath -w "$1"`
outfile=`cygpath -w "${1%.*}"`

echo $1

FFPROBE="$FFDIR/ffprobe.exe"
FFMPEG="$FFDIR/ffmpeg.exe"

codec=`"$FFPROBE" -loglevel quiet -show_streams -select_streams a -i "$infile" | \
  sed -En 's/codec_name=(.*)/\1/p'`

printf "Found codec '%s'\n" "$codec" >&2
	
case "$codec" in
	'aac')
		opts='-acodec copy'
		ext='m4a'
		;;
	'mp3')
		opts='-acodec copy'
		ext='mp3'
		;;
	*)
		opts='-acodec mp3 -qscale 0'
		ext='mp3'
esac

if [[ -n $2 ]]; then
	outopts="-ss $2"
fi

printf "Using ffmpeg options '%s'\n" "$opts" >&2

printf "Saving '%s.%s'\n" "$outfile" "$ext" >&2

"$FFMPEG" -i "$infile" $opts -vn -loglevel error $outopts "${outfile}.${ext}"