Some [more or less custom] Nemo actions

Audio / Video / Image

• 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 installation (Debian / Ubuntu)

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

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 (gnome-icon-theme package)

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