Some [more or less custom] Nemo actions

Update since some versions of nemo, some actions doesn't works anymore. This is due to an issue in nemo actions files parsing (this is a problem parsing % of bash parameter expansion). The problem has been fixed in this commit and deployed in Nemo version 4.8.3. If you use an older version of Nemo you should see some errors invoking %F. Try to update Nemo to a version >= 4.8.3

Audio / Video

• extract_sound : use ffmpeg to extract sound from video, and create a sound file in the same dir (with corresponding extension)
• concatenate_wavs : use sox to concatenate multiple wavs, and create a resulting wav file in the same dir (named as concatenation of wavs filenames)
• convert_to_mp3 : use lame to convert files to mp3, and create sound files in the same dir (with corresponding extension). No check is done on the file format (must be wav)
• convert_to_wav : use ffmpeg to convert files to wav, and create sound files in the same dir (with corresponding extension).
• convert_to_aac : use ffmpeg to convert files to aac, and create sound files in the same dir (with corresponding extension).
• convert_to_flac : use flac to convert files to flac, and create sound files in the same dir (with corresponding extension). No check is done on the file format (must be wav)
• normalize audio : use ffmpeg to normalize audio levels (using loudnorm filter), and create sound files in the same dir (with "-norm" appended to name). No check is done on the file format (must be wav)
• flac_to_wav : use flac to extract selected flac file(s) to wav
• image_resize : use mogrify (ImageMagick) to resize images
• convert to webp : use mogrify (ImageMagick) to convert images to Webp format
• stabilize_videos : use ffmpeg / libvid.stab to stabilize a video file, or all videos inside a directory, and display advancement using zenity
• repair_video : use ffmpeg to "repair" a video file, ie copy content and rewrite file headers
• convert_to_gif: use ffmpeg to convert selected videos to Gif (animated)

Others actions

• paste_link : create a softlink to selected file, in the same directory (same name, prefixed by "link to")
• pdfimages_extract : use pdfimages command (poppler-utils package in Debian) to extract images from PDF and place them in "pdfimages" subdir
• pdf_repair : use qpdf command to repair PDF file and create "-repaired.pdf" file
• pdf_to_djvu : use pdf2djvu command to convert PDF file to DJVU format
• link to Public : make a link to the file onto ~/Public directory (typically shared via Samba)
• remove_empty_dirs : recursively remove dirs that do not contains any file
• remove_node_modules : recursively remove node_modules dirs
• remove_exif_data : use exiftool to remove exif data from image
• remove_empty_dirs : recursively remove dirs that do not contains any file
• mass_rename : launch Thunar's mass reame utility with selected files
• img2pdf : use img2pdf utility to create a PDF file from selected images

Install

• install zenity
• install lame (to use audio conversion scripts)
• bundle install (this will install Ruby dependencies)
• link or put files to ~/.local/share/nemo/actions/
• restart nemo (nemo -q; nemo)

Other dependencies

• Imagemagick (apt install imagemagick) to use images resizing
• ffmpeg (apt install ffmpeg) to use video tools
• sox (apt install sox) to use wavs concatenation tools
• lame (apt install lame) to use audio conversions tools
• flac (apt install flac) to use flac compression tools
• pdfimages (apt install poppler-utils) to use PDF images extraction tools
• pdf_repair (apt install qpdf) to use PDF file repairing tools
• pdf2djvu (apt install pdf2djvu) to use PDF to DJVU conversion tool
• Thunar (apt install thunar) to use mass rename action

All in one:

apt install imagemagick ffmpeg sox lame flac pdfimages pdf_repair poppler-utils pdf2djvu thunar img2pdf

Debug

nemo -q; NEMO_DEBUG=Actions nemo

Write an action

To make scripts executed to multiple files with a progress bar, use bash_action.rb. Simple example:

• execute ls command on each selected files: Exec=<scripts/bash_action.rb "ls {}" %F>
• same effect, but adding a bash variable: Exec=<scripts/bash_action.rb "filename={}; ls \"$filename\"" %F>

Take a look to existing actions. Particularly flac_to_wav.nemo_action is a simple real-world example.

To specify icon you can use Icon-Name. Available icons are located in /usr/share/icons/gnome/32x32/actions.

Debug actions (show actions logs and Nemo errors about actions)

nemo -q; NEMO_ACTION_VERBOSE=1 nemo --no-desktop

Some tricks:

• the space between " and %F> is important; ie "%F> will not work

TODO

• catch errors and use Zenity to pass error messages to user