An improved bash script to shuffle files and the MP3 tags too

Submitted by Nicola Rainiero on 2018-04-01 (last updated on 2018-04-02)

The script removes empty spaces and special characters (i.e. ', " and -) from a directory of defined files and then it shuffles them by adding a random number followed by an underscore. For the MP3 files it mixes-up also the ID3 tags and it has a special feature to add them if missing, starting from the filename (only if it is renamed like this: Album_name-Artist_name-Title_name.mp3 or Artist_name-Title_name.mp3).

Thanks to the useful comments followed my previous script: How to shuffle slyly a list of file with a bash script, I have rewritten my first one introducing a new faster shuffle engine and adding a new feature to rename not only the filename but also the id3 tags of the mp3 files. Indeed many modern MP3 players use the tag for sorting and not consider anymore the filename.

First, I want to thanks Sitaram Chamarty, his solution with BASH_REMATCH is pretty simple, elegant and awesome. Now it is faster and it possible to adapt automatically the quantity of zero in the prefix considering the final number of the files (00x if there are more of 100 files and so on).

Second, Joe with his modification to the cleaning process.

I have developed the script some months ago and after four revisions I realised that this is almost the last complete one, so I finally decided to publish it.

An improved bash script to shuffle files and the MP3 tags too

Requirement

  • id3v21  only if the extension is mp3

Usage

First you have to check the SETTINGS section of the script and change if is necessary:

# SETTINGS:
ext=mp3		# extension of the files to shuffle

In this case the files to randomise and rename is MP3

After fixed, it works in this manner:

    ./fileRandomizer.sh -shuffle directory --> to add a random prefix to a directory of mp3
    ./fileRandomizer.sh -clean directory   --> to remove the prefix to a directory of mp3
    ./fileRandomizer.sh -tags directory    --> to add id3 tags to a directory of mp3
                                               from the filename: Album-Artist-Title.mp3

NOTE: the directory is not necessary if you have the files in the working directory.

Download

You can find and download my script at the following link:

Example

$ ls -a Example/
.                             fldgkr-scikjzho-tfcmpfvg.mp3  kvjfui-kpmmmmdw-frvvfkvr.mp3  vdnnhn-ydondrlz-nuimzjfu.mp3
..                            fytuba-urksaxbg-gpdamiep.mp3  ldxtwg-xsedzjmt-ygccxtym.mp3  vqqjxb-kgtwdpxd-agcykotg.mp3
aqgbfc-xygqxlit-cqcmaxbk.mp3  ibxtvv-moxfcbey-hvcvtnve.mp3  rwfunt-jsjmwrof-fxxyefoy.mp3  xbwhvy-napflydm-oocbrckn.mp3
bmfcgg-unxqktni-hwsrjjoa.mp3  ilulvp-iwippocb-wbzyjked.mp3  rzroiq-azufwutp-vgqahoem.mp3  xfheij-plwlouwx-foqbfusz.mp3
divjyr-uvlfmxdf-sxofuvbf.mp3  iohgdx-koerbnva-osfhsgyq.mp3  sbjrsl-eijzbrbr-fjsrwrhh.mp3
elldzf-oytlqtfq-vneqgafq.mp3  jvbjoe-uarbinej-cyxhfxlt.mp3  txszoi-gjdrpqlm-ytbzmklp.mp3
$ ./fileRandomizer.sh -shuffle Example/
$ ls -a Example/
.                                05-aqgbfc-xygqxlit-cqcmaxbk.mp3  11-divjyr-uvlfmxdf-sxofuvbf.mp3  17-sbjrsl-eijzbrbr-fjsrwrhh.mp3
..                               06-kvjfui-kpmmmmdw-frvvfkvr.mp3  12-ldxtwg-xsedzjmt-ygccxtym.mp3  18-fytuba-urksaxbg-gpdamiep.mp3
01-rwfunt-jsjmwrof-fxxyefoy.mp3  07-txszoi-gjdrpqlm-ytbzmklp.mp3  13-vdnnhn-ydondrlz-nuimzjfu.mp3  19-elldzf-oytlqtfq-vneqgafq.mp3
02-ibxtvv-moxfcbey-hvcvtnve.mp3  08-jvbjoe-uarbinej-cyxhfxlt.mp3  14-xfheij-plwlouwx-foqbfusz.mp3  20-fldgkr-scikjzho-tfcmpfvg.mp3
03-iohgdx-koerbnva-osfhsgyq.mp3  09-rzroiq-azufwutp-vgqahoem.mp3  15-bmfcgg-unxqktni-hwsrjjoa.mp3
04-xbwhvy-napflydm-oocbrckn.mp3  10-vqqjxb-kgtwdpxd-agcykotg.mp3  16-ilulvp-iwippocb-wbzyjked.mp3
$ ./fileRandomizer.sh -clean Example/
$ ls -a Example/
.                             fldgkr-scikjzho-tfcmpfvg.mp3  kvjfui-kpmmmmdw-frvvfkvr.mp3  vdnnhn-ydondrlz-nuimzjfu.mp3
..                            fytuba-urksaxbg-gpdamiep.mp3  ldxtwg-xsedzjmt-ygccxtym.mp3  vqqjxb-kgtwdpxd-agcykotg.mp3
aqgbfc-xygqxlit-cqcmaxbk.mp3  ibxtvv-moxfcbey-hvcvtnve.mp3  rwfunt-jsjmwrof-fxxyefoy.mp3  xbwhvy-napflydm-oocbrckn.mp3
bmfcgg-unxqktni-hwsrjjoa.mp3  ilulvp-iwippocb-wbzyjked.mp3  rzroiq-azufwutp-vgqahoem.mp3  xfheij-plwlouwx-foqbfusz.mp3
divjyr-uvlfmxdf-sxofuvbf.mp3  iohgdx-koerbnva-osfhsgyq.mp3  sbjrsl-eijzbrbr-fjsrwrhh.mp3
elldzf-oytlqtfq-vneqgafq.mp3  jvbjoe-uarbinej-cyxhfxlt.mp3  txszoi-gjdrpqlm-ytbzmklp.mp3
$ ./fileRandomizer.sh -tags Example/
 
1) aqgbfc_album_2-xygqxlit_artist_1-song_cqcmaxbk.mp3 hasn't the tags, they will be added.
 
2) aqgbfc_xygqxlit_cqcmaxbk.mp3 hasn't the tags, they will be added.

Do nothing, the "aqgbfc_xygqxlit_cqcmaxbk.mp3" has a wrong format:
only album-artist-title or artist-title is allowed

$ id3v2 -l aqgbfc_album_2-xygqxlit_artist_1-song_cqcmaxbk.mp3 
id3v1 tag info for aqgbfc_album_2-xygqxlit_artist_1-song_cqcmaxbk.mp3:
Title  : song cqcmaxbk                   Artist: xygqxlit artist 1             
Album  : aqgbfc album 2                  Year: 2006, Genre: Unknown (255)
Comment:                                 Track: 1
id3v2 tag info for aqgbfc_album_2-xygqxlit_artist_1-song_cqcmaxbk.mp3:
TYER (Year): 2006
TRCK (Track number/Position in set): 1
TALB (Album/Movie/Show title): aqgbfc album 2
TPE1 (Lead performer(s)/Soloist(s)): xygqxlit artist 1
TIT2 (Title/songname/content description): song cqcmaxbk

$ id3v2 -l aqgbfc_xygqxlit_cqcmaxbk.mp3 
id3v1 tag info for aqgbfc_xygqxlit_cqcmaxbk.mp3:
Title  :                                 Artist:                               
Album  :                                 Year: 2006, Genre: Unknown (255)
Comment:                                 Track: 1
aqgbfc_xygqxlit_cqcmaxbk.mp3: No ID3v2 tag

  • 1. I choose this one because it is easy to install and to use, but reading some discussion in the net probably mid3v2 is the most reliable and modern command line tagging tool.


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Nicola Rainiero

A civil geotechnical engineer with the ambition to facilitate own work with free software for a knowledge and collective sharing. Also, I deal with green energy and in particular shallow geothermal energy. I have always been involved in web design and 3D modelling.

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