Bash scripts I use in nautilus, they can be used without it by providing a list of files as arguments. 

To use them with nautilus place them in `.local/share/nautilus/scripts`, and they will appear in the right-click "Scripts" drop menu.

Make Telegram Sticker: Scales an image so that the larger dimension is 512px.

Convert to mp4/mp3: Converts media files to respective format using ffmpeg. I use this because GNOME's screencasts default to `webm` which is poorly supported by phones.