Command line utility ffmpeg, dedicated to different transformations of video, is one of the tools which genuinly feel like magic. ffmpeg download link can do a lot, so it is no surprise that the documentation is overwhelming. Below are some usecases so that I do not have to search for them again and again. Dowload this document as a pdf Use cases get info about the video ffprobe -v error -select_streams v:0 \ -show_entries stream=width,height,r_frame_rate,avg_frame_rate \ -of default=noprint_wrappers=1 <file-name> Extract first frame of the video to make a crop based on pixels ffmpeg -i input....

Setting in .bashrc awk defaults to working with whitespace, not with commas, better ot set the comma as an field separator, and otuput field separator and name this modification awkc. Add this to ~/.bashrc # make a csv specific awk alias awkc='awk -F, -v OFS=,' Split a csv file into multiple files based on 7th column awk -F',' 'NR==1{h=$0; next} { f = $7 ".csv" if (!(f in seen)) { print h > f seen[f] } print >> f }' input....

Make a panel montage -label %f -geometry 400x300+4+4 -tile 2x3 *.jpg output_panel.jpg This will make a panel (two columns, three rows) where each image is 400x300pxs big with 4 pxs spacing in horizontal and vertical axis, name of each file will be under the image Resize/transform images Bit depth convert -depth 8 converts to 8 bit depth Rotate convert -rotate 90 rotates 90dg clockwise get a crop of images from the center for img in img1....

Notes: Images not copied here yet Links Link to my older repo Tutorial Evanto Tuts Installing Hugo adding path to an executable file link to my website link to hugo features Motivation I want to learn how to build a website, because I need to have a way how to present myself online. Why HUGO It can do the websites using just markdown, which I am able to work with and do not want to learn anything extra....

download as pdf Short script to filter csv file using the first couple of columns using a different csv file Example usecase I have an output csv file from cell profiler called data.csv. First column is an image number and second column is an object number, the rest are the different measurments. Based on the visual control I want to: remove measurments single object (object 1) from an image 1 remove measurements of all objects from image 2....

Download this as a pdf Download a video with subtitles embedded in the video yt-dlp --write-subs --sub-lang en --sub-format srt --embed-subs https://www.youtube.com/watch?v=VIDEO_ID Downloading a playlist into mp3 yt-dlp -x --audio-format mp3 \ --embed-metadata \ --audio-quality 5 \ <link> NOTE: after the last slash the format for playing is /watch?v=<numbers1>&list=<numbers2> need to be must be /playlist?list=<numbers2> Split into chapters yt-dlp -x --audio-format mp3 \ --embed-metadata \ --audio-quality 5 \ --split-chapters \ <link> Dowloading multiple files using a file with links (one per line) yt-dlp -a links \ -x --audio-format mp3 \ --embed-metadata \ --audio-quality 5 Troubleshooting Appears yt-dlp is in constant tug of war with google, so make sure you use the latest version....

List of programmes which need to be installed tailscale # git sudo apt install git -y # vim sudo apt install vim -y # samba neofetch curl obs audacity wine and wine tricks ffmpeg pandoc pdfgrep tmux csvkit hugo go-lang nicer fonts(?) image-magick fiji gnome-tweaks distrobox podman docker brave microsoft fonts ocular vlc whatsapp Configs Create keys to connect to: .bashrc .vimrc

List of programmes which need to be installed tailscale # git sudo apt install git -y # vim sudo apt install vim -y # samba neofetch curl obs audacity wine and wine tricks ffmpeg pandoc pdfgrep tmux csvkit hugo go-lang nicer fonts(?) image-magick fiji gnome-tweaks distrobox podman docker brave microsoft fonts ocular vlc whatsapp Configs Create keys to connect to: .bashrc .vimrc

Installation sudo apt install neovim Plugins setup Install vim-plug curl -fLo ~/.local/share/nvim/site/autoload/plug.vim --create-dirs https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim Make nvim config directory and init file mkdir ~/.config/nvim vim ~/config/nvim/init.vim call plug#begin('~/.local/share/nvim/site/plugged') Plug 'junegunn/goyo.vim' Plug 'vim-airline/vim-airline' Plug 'ixru/nvim-markdown' Plug 'sheerun/vim-polyglot' " Better syntax support Plug 'scrooloose/NERDTree' " File explorer Plug 'jiangmiao/auto-pairs' " Auto-pairing for brackets, quotes, etc. call plug#end() Install plugins nvim # Start nvim :PlugInstall Plugins NERDTree :NERDTree in nvim to start it o to open file or directory x to close nvim markdown Tab to collapse fold -> to expand fold

Motivation Be able to search through papers without needing to open them Resources link to official webpage Installation sudo apt install pdfgrep version installed: This is pdfgrep version 2.2.0. Using poppler version 24.02.0 Using libpcre2 version 10.42 2022-12-11 Use cases List files containig a matching word pdfgrep -i -l rhoa *.pdf | less finds all pdf files containg word rhoa independently on case Find lines with a word with 3 lines around it for context in a single file pdfgrep -i -C 3 rhoa Vinarsky_CDD_2025....