In both my previous and recent projects, I have been working with tags (metadata) of music files. One of the reason being I am rather particular about having a nicely organised library with all tag data aligned to the same format. Until recently while I was seeking for a solution to read and write tags of (potentially) all music formatsI only have MP3, FLAC, AIFF and M4A in my library, so that’s kinda all for me., and I encountered FFmpeg, the Swiss Army Knife of media processing.
FFmpeg has always been my go-to solution for processing media programmatically or in batch, and I have recently found the way to write into the tags of music files using it. The way of doing so might be a little verbose as everything have to fit into the command line interface with other components.
Read tags
ffprobe -show_format -print_format json aiffout.aiff ffprobe version 4.2.1 Copyright (c) 2007-2019 the FFmpeg developers built with Apple clang version 11.0.0 (clang-1100.0.33.8) configuration: --prefix=/usr/local/Cellar/ffmpeg/4.2.1_2 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags='-I/Library/Java/JavaVirtualMachines/adoptopenjdk-13.jdk/Contents/Home/include -I/Library/Java/JavaVirtualMachines/adoptopenjdk-13.jdk/Contents/Home/include/darwin -fno-stack-check' --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --disable-libjack --disable-indev=jack libavutil 56. 31.100 / 56. 31.100 libavcodec 58. 54.100 / 58. 54.100 libavformat 58. 29.100 / 58. 29.100 libavdevice 58. 8.100 / 58. 8.100 libavfilter 7. 57.100 / 7. 57.100 libavresample 4. 0. 0 / 4. 0. 0 libswscale 5. 5.100 / 5. 5.100 libswresample 3. 5.100 / 3. 5.100 libpostproc 55. 5.100 / 55. 5.100 { Input #0, aiff, from 'aiffout.aiff': Metadata: title : shake it! artist : emon feat. 初音ミク.鏡音リン.鏡音レン album : 「マジカルミライ 2014」OFFICIAL ALBUM compilation : 1 encoded_by : Max 0.9.1 title-sort : shake it! album-sort : 「まじかるみらい 2014」OFFICIAL ALBUM TDTG : 2014-11-03T15:38:58 artist-sort : emon feat sort encoder : Lavf58.29.100 Duration: 00:03:47.03, start: 0.000000, bitrate: 2822 kb/s Stream #0:0: Audio: pcm_s32be, 44100 Hz, 2 channels, s32, 2822 kb/s "format": { "filename": "aiffout.aiff", "nb_streams": 1, "nb_programs": 0, "format_name": "aiff", "format_long_name": "Audio IFF", "start_time": "0.000000", "duration": "227.027528", "size": "80095752", "bit_rate": "2822415", "probe_score": 100, "tags": { "title": "shake it!", "artist": "emon feat. 初音ミク.鏡音リン.鏡音レン", "album": "「マジカルミライ 2014」OFFICIAL ALBUM", "compilation": "1", "encoded_by": "Max 0.9.1", "title-sort": "shake it!", "album-sort": "「まじかるみらい 2014」OFFICIAL ALBUM", "TDTG": "2014-11-03T15:38:58", "artist-sort": "emon feat sort", "encoder": "Lavf58.29.100" } } }
Write tags
ffmpeg -i aiff.aiff -map 0 -y -codec copy -write_id3v2 1 -metadata "artist-sort=emon feat sort" aiffout.aiff ffmpeg version 4.2.1 Copyright (c) 2000-2019 the FFmpeg developers built with Apple clang version 11.0.0 (clang-1100.0.33.8) configuration: --prefix=/usr/local/Cellar/ffmpeg/4.2.1_2 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags='-I/Library/Java/JavaVirtualMachines/adoptopenjdk-13.jdk/Contents/Home/include -I/Library/Java/JavaVirtualMachines/adoptopenjdk-13.jdk/Contents/Home/include/darwin -fno-stack-check' --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --disable-libjack --disable-indev=jack libavutil 56. 31.100 / 56. 31.100 libavcodec 58. 54.100 / 58. 54.100 libavformat 58. 29.100 / 58. 29.100 libavdevice 58. 8.100 / 58. 8.100 libavfilter 7. 57.100 / 7. 57.100 libavresample 4. 0. 0 / 4. 0. 0 libswscale 5. 5.100 / 5. 5.100 libswresample 3. 5.100 / 3. 5.100 libpostproc 55. 5.100 / 55. 5.100 Guessed Channel Layout for Input Stream #0.0 : stereo Input #0, aiff, from 'aiff.aiff': Metadata: title : shake it! artist : emon feat. 初音ミク.鏡音リン.鏡音レン album : 「マジカルミライ 2014」OFFICIAL ALBUM compilation : 1 encoded_by : Max 0.9.1 title-sort : shake it! creation_time : 2014-11-03T15:38:58 TDTG : 2014-11-03T15:38:58 album-sort : 「まじかるみらい 2014」OFFICIAL ALBUM artist-sort : emon feat. はつねみく.かがみねりん.かがみねれん Duration: 00:03:47.03, start: 0.000000, bitrate: 2822 kb/s Stream #0:0: Audio: pcm_s32be, 44100 Hz, stereo, s32, 2822 kb/s Output #0, aiff, to 'aiffout.aiff': Metadata: title : shake it! artist : emon feat. 初音ミク.鏡音リン.鏡音レン album : 「マジカルミライ 2014」OFFICIAL ALBUM compilation : 1 encoded_by : Max 0.9.1 title-sort : shake it! album-sort : 「まじかるみらい 2014」OFFICIAL ALBUM TDTG : 2014-11-03T15:38:58 artist-sort : emon feat sort encoder : Lavf58.29.100 Stream #0:0: Audio: pcm_s32be (NONE / 0x454E4F4E), 44100 Hz, stereo, s32, 2822 kb/s Stream mapping: Stream #0:0 -> #0:0 (copy) Press [q] to stop, [?] for help size= 78219kB time=00:03:47.02 bitrate=2822.5kbits/s speed=2.08e+03x video:0kB audio:78218kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000549%
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