108 lines
2.9 KiB
Bash
Executable File
108 lines
2.9 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -e
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# Copyright (C) 2021 Tessa Nordgren
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation, version 3.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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RESAMPLING_OPTS="-af aresample=resampler=soxr:dither_method=shibata:precision=28:out_channel_layout=mono -ar 16000"
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ML_SPEECH_OPTS="--language-code=en --include-word-time-offsets --encoding=ogg-opus --sample-rate=16000"
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function check_deps() {
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for TOOL in gcloud ffmpeg python3; do
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if [[ ! -f "$(which ${TOOL})" ]]; then
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echo "missing ${TOOL}, please install!"
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return 1
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fi
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done
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return 0
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}
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function usage() {
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echo "Usage: $(basename $0) [-h] video [video ...]"
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echo -e "\tvideo\tvideo file(s) to convert audio to subtitles."
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echo -e "\t-h\tshows this usage message."
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echo -e "\t-n\tdon't include audio in output."
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}
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INCLUDE_AUDIO=1
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function argparse() {
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if [[ ${#} -eq 0 ]]; then
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echo -e "$0: must supply one or more video files to process\n" >&2
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usage
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return 1
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fi
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optstring=":hn"
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while getopts "${optstring}" arg; do
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case "${arg}" in
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h)
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usage
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exit 0
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;;
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n)
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export INCLUDE_AUDIO=0
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;;
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:)
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echo -e "$0: must supply argument to -$OPTARG.\n" >&2
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exit 1
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;;
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?)
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echo -e "$0: invalid option: -${OPTARG}\n" >&2
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usage
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exit 2
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;;
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esac
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done
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shift $(($OPTIND - 1))
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export ARGS=( "$@" )
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}
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function title() {
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echo "Processing '$1'..."
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COUNT="$(seq 0 ${#1})"
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UNDERLINE="$(printf '=%.0s' ${COUNT})"
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echo "------------${UNDERLINE}----"
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}
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check_deps
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argparse "$@"
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mkdir -p tmp
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for FILE in "${ARGS[@]}"; do
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title "${FILE}"
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BASENAME="$(basename "${FILE%.*}")"
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AUDIO="tmp/${BASENAME}.opus"
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YML="tmp/${BASENAME}.yml"
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SRT="tmp/${BASENAME}.srt"
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OUT="${FILE%.*}_with_subs.mkv"
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if [[ ! -f "${AUDIO}" ]]; then
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echo "extracting audio..."
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ffmpeg -loglevel error -y -i "${FILE}" ${RESAMPLING_OPTS} "${AUDIO}"
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fi
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if [[ ! -f "${YML}" ]]; then
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echo "converting audio to text..."
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gcloud -q --format yaml ml speech recognize-long-running "${AUDIO}" ${ML_SPEECH_OPTS} > "${YML}"
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fi
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if [[ ! -f ${SRT} ]]; then
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echo "converting google yaml data to subtitle data..."
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./ml2srt.py "${YML}"
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fi
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if [[ "${INCLUDE_AUDIO}" == 0 ]]; then
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AUDIO_OPTS="-an"
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fi
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ffmpeg -loglevel error -y -i "${FILE}" -i "${SRT}" ${AUDIO_OPTS} -c copy "${OUT}"
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echo -e "Finished, result is in: '${OUT}'\n"
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done
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