132 lines
3 KiB
Bash
132 lines
3 KiB
Bash
# Convert between different formats.
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# Usage: transcode <FORMAT> [FILES]
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transcode()
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{
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local IFS=$'\n'
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local targets=("${@:2}")
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local format="${1}"
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local total=${#targets[@]}
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local count=0
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local failed=0
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# Report no format.
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if [[ "${format}" = "" ]]; then
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echo -e "${color_bred}No format specified.${color_default}"
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echo "Usage: transcode <FORMAT> [FILES]"
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return 2
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fi
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# All files by default.
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if [[ "${targets}" = "" ]]; then
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targets=($(ls --classify | grep -v /$))
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total=${#targets[@]}
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fi
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# Process.
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for target in "${targets[@]}"; do
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# Increment counter.
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((count++))
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# Define context names and status.
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local from="${target##*.}"
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local to="${format}"
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local status="[${count}/${total}] ${target} -> ${target%.*}.${to}"
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# Show status.
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echo -e "${status}"
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# Skip same format.
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[[ "${from}" = "${to}" ]] && continue
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# Support multiple inputs.
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[[ "${to}" = "mp3" ]] && from=""
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[[ "${to}" = "flac" ]] && from=""
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[[ "${to}" = "mka" ]] && from=""
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[[ "${to}" = "mkv" ]] && from=""
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# Send convert.
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case "${from}-${to}" in
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"gz-xz"|"tgz-txz")
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_transcode_gz-xz "${target}"
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;;
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"xz-gz"|"txz-tgz")
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_transcode_xz-gz "${target}"
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;;
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"-mp3")
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_transcode_mp3 "${target}"
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;;
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"-av1")
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_transcode_av1 "${target}"
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;;
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"-flac")
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_transcode_flac "${target}"
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;;
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"-mka")
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_transcode_mka "${target}"
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;;
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"-mkv")
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_transcode_mkv "${target}"
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;;
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*)
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echo -e "${color_yellow}Conversion ${target##*.}-${to} not supported.${color_default}"
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false
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;;
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esac
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# Show error.
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if [[ ${?} != 0 ]]; then
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echo -e "${color_bred}${status}: Failed.${color_default}"
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((failed++))
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fi
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done
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if [[ ${failed} != 0 ]]; then
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echo -e "${color_bred}Failed: ${failed}.${color_default}"
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false
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fi
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}
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_transcode_gz-xz()
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{
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pv "${1}" | gzip -d | xz -9e > "${1%gz}xz"
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}
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_transcode_xz-gz()
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{
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pv "${1}" | xz -d | gzip -1 > "${1%xz}gz"
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}
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_transcode_mp3()
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{
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ffmpeg -i "${1}" -c:a libmp3lame -b:a 320k -f mp3 "${1%.*}.mp3"
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}
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_transcode_flac()
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{
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ffmpeg -i "${1}" -c:a flac -f flac "${1%.*}.flac"
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}
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_transcode_mka()
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{
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ffmpeg -i "${1}" -c:a libopus -b:a 128k -vn "${1%.*}.mka"
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}
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_transcode_mkv()
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{
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# Calculate keyframe int.
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local fps=$(ffprobe -v 0 -of csv=p=0 -select_streams v:0 -show_entries stream=r_frame_rate "${1}")
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fps="${fps%%/*}"
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local keyint=$((fps*5))
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# Calculate audio bitrate.
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local braudio=$(ffprobe -v error -select_streams a:0 -show_entries stream=bit_rate -of default=noprint_wrappers=1:nokey=1 "${1}")
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braudio=$((braudio/1024))
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[[ ${braudio} -gt 128 ]] && braudio=128
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# Convert.
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ffmpeg -i "${1}" -c:a libopus -b:a ${braudio}k -c:v libsvtav1 -crf 35 -svtav1-params "fast-decode=1:tune=0" -preset 8 -g ${keyint} -vf "scale=-1:min'(1080,ih)'" "${1%.*}.mkv"
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}
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# Export.
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export -f transcode _transcode_gz-xz _transcode_xz-gz _transcode_mp3 _transcode_flac _transcode_mka _transcode_mkv
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