100 lines
3.4 KiB
Nix
100 lines
3.4 KiB
Nix
{ ... }: {
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text = ''
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# Mux audio into containers. File names in sound and current dirrectories must match.
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# Usage: ffmpeg_mux_audio <SOUND> <OUTPUT DIR>
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function ffmpeg_mux_audio() {
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if [[ "''${1}" = "" ]]; then
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help ffmpeg_mux_audio
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return 2
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fi
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for file in *; do ffmpeg -i "$file" -i "$1"/"$file" -c copy -map 0:v:0 -map 1:a:0 -shortest "$2"/"$file"; done
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}
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# Mux cover into music file.
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# Usage: ffmpeg_mux_cover <FORMAT> <COVER>
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function ffmpeg_mux_cover() {
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if [[ "''${1}" = "" ]]; then
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help ffmpeg_mux_cover
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return 2
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fi
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local format="''${1}"
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local cover="''${2}"
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mkdir out
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case "''${format}" in
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# "mka"|"mkv")
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# for file in *.''${format}; do
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# ffmpeg -i "''${file}" -attach "''${cover}" -map 0 -c copy -metadata:s:t mimetype="image/''${cover##*.}" -metadata:s:t:0 filename="cover.''${cover##*.}" "./out/''${file}" || return 1
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# done
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# ;;
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*)
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for file in *.''${format}; do
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# ffmpeg -i "''${file}" -i "''${cover}" -map 0 -map 0:-v? -map 1 -codec copy -metadata:s:v title="Album cover" -metadata:s:v comment="Cover (front)" -disposition:v attached_pic ./out/"''${file}" || return 1
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ffmpeg -i "''${file}" -i "''${cover}" -map 0 -map 1 -codec copy -metadata:s:v title="Album cover" -metadata:s:v comment="Cover (front)" -disposition:v attached_pic ./out/"''${file}" || return 1
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done
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;;
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esac
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mv out/* .
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rm -d out/ && rm "''${2}"
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}
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# Generate music metadata from directory structure.
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# Top dir is the Artist name like this: `The_Beatles`.
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# Next are albums like this: `2010_My_love`.
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# Inside are songs like this: `01_sample.flac`.
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# Usage: ffmpeg_music_meta <FORMAT>
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function ffmpeg_music_meta() {
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if [[ "''${1}" = "" ]]; then
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help ffmpeg_music_meta
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return 2
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fi
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local format="''${1}"
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ls *.''${format} &> /dev/null || return 1
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local artist="''${PWD%/*}"; artist="''${artist##*/}"; artist="''${artist//_/ }"
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local album="''${PWD##*/}"; album="''${album#*_}"; album="''${album//_/ }"
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local year="''${PWD##*/}"; year="''${year%%_*}"
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# local total=$(ls *.''${format} | wc -l)
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mkdir out
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for file in *.''${format}; do
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local track="''${file%%_*}"; track=$((10#''${track})); [[ "''${track}" = "" ]] && track=0
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local title="''${file#*_}"; title="''${title%.*}"; title="''${title//_/ }"
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# echo "''${artist}; ''${album}; ''${year}; ''${track}; ''${title}"
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# TODO: make it format-specific.
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ffmpeg -i "''${file}" -map 0 -c copy -metadata "artist=''${artist}" -metadata "album_artist=''${artist}" -metadata "album=''${album}" -metadata "date=''${year}" -metadata "year=''${year}" -metadata "date_released=''${year}" -metadata "track=''${track}" -metadata "part_number=''${track}" -metadata "title=''${title}" ./out/"''${file}" || return 1
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done
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mv out/* .
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rm -d out/
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}
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# Get video FPS.
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function _ffprobe_fps() {
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local fps=$(ffprobe -v 0 -of csv=p=0 -select_streams v:0 -show_entries stream=r_frame_rate "''${1}")
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[[ "''${fps}" = "" ]] && fps=30 || fps=$((fps))
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echo "''${fps}"
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}
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# Get recommended keyframe interval for a file.
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function _ffprobe_keyint() {
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local fps=$(_ffprobe_fps "''${1}")
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echo $((fps*5))
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}
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# Get audio bitrage. 128 by default.
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function _ffprobe_ba() {
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local ba=$(ffprobe -v error -select_streams a:0 -show_entries stream=bit_rate -of default=noprint_wrappers=1:nokey=1 "''${1}")
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[[ "''${ba}" != "N/A" ]] && echo $((ba/1024)) || echo 128
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}
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'';
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}
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