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authorkatherine <shmibs@airen-no-jikken.icu>2018-12-19 17:35:39 -0700
committerkatherine <shmibs@airen-no-jikken.icu>2018-12-19 17:35:39 -0700
commitdb947a1f555eab19b87cd540c831d1fc30310025 (patch)
tree5092b1757671aa384b02625f0e6dc48804b687d9 /.config/init/funcs/audio-concat
parent5b7c0ef6b8d064685713e76143d89669b0d08f7d (diff)
downloaddotfiles-db947a1f555eab19b87cd540c831d1fc30310025.tar.gz
add fancy new functions, with shared helpers
Diffstat (limited to '.config/init/funcs/audio-concat')
-rwxr-xr-x.config/init/funcs/audio-concat127
1 files changed, 127 insertions, 0 deletions
diff --git a/.config/init/funcs/audio-concat b/.config/init/funcs/audio-concat
new file mode 100755
index 0000000..73b3ae7
--- /dev/null
+++ b/.config/init/funcs/audio-concat
@@ -0,0 +1,127 @@
+#!/usr/bin/env zsh
+# concatenate multiple audio files into one
+
+source "$HOME/.config/init/helpers" || exit 1
+
+local callstr=$0
+
+usage() {
+ echo "Usage: $callstr [OPTIONS...] <infile>..."
+ echo "Concatenate multiple audio files into one"
+ echo ""
+ echo " \e[1mdescription opt longform arg default\e[0m"
+ echo " specify destination file -o --outfile <file> out.ogg"
+ echo " specify output bitrate -b --bitrate <int>k (opus:35k, vorbis:50k, mp3:65k, flac:N/A)"
+ echo " workaround for many inputs -m --many"
+ echo " print this help -h --help"
+ exit 0
+}
+
+trap_abort() {
+ echo ""
+ abort "process interrupted"
+}
+
+trap 'trap_abort' SIGABRT SIGHUP SIGINT SIGQUIT SIGTERM
+
+local dest='out.opus'
+
+local destpat='^.*\.(opus|mp3|ogg|flac)$'
+local bitratepat='^[1-9][0-9]*k$'
+
+local filterstr
+local codecstr
+local bitratestr
+local many
+
+local parseerr=$(2>&1 zparseopts -D -E -M -A args \
+ o: -outfile:=o \
+ b: -bitrate:=b \
+ m -many=m \
+ h -help=h | cut -d ' ' -f 2-)
+
+[[ -z $parseerr ]] || abort $parseerr
+
+zparseopts -D -E -M -A args \
+ o: -outfile:=o \
+ b: -bitrate:=b \
+ m -many=m \
+ h -help=h
+
+local optarg
+for opt in ${(@k)args}; do
+ unset optarg
+ [[ -z $args[$opt] ]] || optarg=$args[$opt]
+ case $opt in
+ -o) [[ $optarg =~ $destpat ]] || \
+ abort "destination file must be of type opus, mp3, or ogg"
+ dest=$optarg
+ [[ ${optarg:e} == 'opus' ]] && codecstr='libopus' \
+ && [[ -z $bitratestr ]] && bitratestr='35k'
+ [[ ${optarg:e} == 'mp3' ]] && codecstr='libmp3lame' \
+ && [[ -z $bitratestr ]] && bitratestr='65k'
+ [[ ${optarg:e} == 'ogg' ]] && codecstr='libvorbis' \
+ && [[ -z $bitratestr ]] && bitratestr='50k'
+ [[ ${optarg:e} == 'flac' ]] && codecstr='flac' \
+ && [[ -z $bitratestr ]] && bitratestr=''
+ ;;
+ -b) [[ $optarg =~ $bitratepat ]] || \
+ abort "bitrate must positive integer + k, for kbps"
+ bitratestr=$optarg
+ ;;
+ -m) many=true ;;
+ -h) usage ;;
+ esac
+done
+
+[[ -z $codecstr ]] && codecstr='libopus'
+[[ -z $bitratestr ]] && bitratestr='35k'
+
+[[ $codecstr == "flac" ]] && bitratestr=''
+
+[[ ${#@} -eq 0 ]] && abort "no input files specified"
+
+if [[ -e $dest ]]; then
+ local delprompt
+ printf "destination file \`$dest\` exists\ndelete it? [y/N]: "
+ read -q delprompt
+ echo ""
+ [[ $delprompt = "y" ]] || return 0
+ 2>/dev/null rm $dest || abort "could not delete file \`$dest\`"
+fi
+
+local pid
+
+if [[ -z $many ]]; then
+ local inputlist=()
+ local i=0
+ for f in $@; do
+ inputlist+=(-i $f)
+ filterstr="${filterstr}[${i}:a:0] "
+ i=$((i+1))
+ done
+
+ filterstr="${filterstr}concat=n=${i}:v=0:a=1 [outa]"
+
+ (
+ ffmpeg -loglevel -8 $inputlist \
+ -filter_complex $filterstr -map '[outa]' \
+ -c:a $codecstr ${bitratestr/*k/-b:a} $bitratestr \
+ -map_metadata -1 $dest
+ ) &
+ pid=$!
+else
+ (
+ for f in $@; do
+ ffmpeg -loglevel -8 -i $f -f s16le -ar 44.1k -ac 2 pipe:
+ done | ffmpeg -loglevel -8 -f s16le -ar 44.1k -ac 2 -i pipe: \
+ -c:a $codecstr ${bitratestr/*k/-b:a} $bitratestr \
+ -map_metadata -1 $dest
+ ) &
+ pid=$!
+fi
+
+local plural
+[[ $#@ -ne 1 ]] && plural='s'
+
+wait-anim $pid "concatenating $#@ file$plural to \`$dest\`"