74 lines
2.5 KiB
Plaintext
74 lines
2.5 KiB
Plaintext
; TODO: More ffmpeg, yt-dlp
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% nixos, nixos-rebuild
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# Rebuild a flake system derivation
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sudo nixos-rebuild <type> --flake .#<flake>
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$ type: echo -e "switch\nbuild\nboot"
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$ flake: echo -e "nixinator\nnixtop"
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% nixos, nix-store, closure, dependency
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# Find out why a package is included in the closure when building the system derivation
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nix why-depends /run/current-system nixpkgs#<package>
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; TODO: Autocomplete executable, list everything in path
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% nixos, nix-store, storepath, link
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# Find the storepath of an executable in the users path
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readlink -f $(which <executable>)
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; TODO: Autocomplete executable, list everything in path
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% nixos, nix-store, storepath, libraries
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# Find the wanted dynamic libraries of an executable in the users path
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ldd $(readlink -f $(which <executable>))
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% shell, process
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# Launch a detached process with suppressed output
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<command> &>/dev/null &
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; TODO: Filter out directories from input autocomplete (if there are no directories basic grep doesn't work, always needs a pattern)
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% ffmpeg, slowmo
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# Create a slow motion version of a video with interpolated/blended frames
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ffmpeg -i <input> -filter:v "minterpolate='mi_mode=mci:mc_mode=aobmc:vsbmc=1:fps=<doublefps>',setpts=2*PTS" output.mp4
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$ input: exa -1
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% ffmpeg, cropdetect
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# Detect black bar dimensions automatically by looking at the first 10 frames
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ffmpeg -i <input> -vframes 10 -vf cropdetect -f null -
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$ input: exa -1
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% ffmpeg, cropdetect, preview
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# Preview video with applied crop settings
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ffplay -vf crop=<width>:<height>:<x>:<y> <input>
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$ input: exa -1
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% ffmpeg, cropdetect, render
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# Re-encode the video with applied crop settings
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ffmpeg -i <input> -vf crop=<width>:<height>:<x>:<y> -c:a copy output.mp4
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$ input: exa -1
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% qemu, cpu
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# Find out what features are supported by different qemu CPUs
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qemu-system-<arch> -cpu help
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; https://github.com/flathub/com.discordapp.Discord/wiki/Rich-Precense-(discord-rpc)
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% discord, flatpak, rich-presence
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# Enable rich presence for flatpak Discord
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ln -sf $XDG_RUNTIME_DIR/{app/com.discordapp.Discord,}/discord-ipc-0
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% find
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# Find files under a certain size in the current directory
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find . -type f -name "<glob>" -size -<size>
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% objdump, disassemble
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# Disassemble an object file
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objdump -d -S -M intel "<file>" | bat -l nasm
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$ file: exa -1
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% pdftocairo, pdf, svg
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# Extract svg figure from pdf page
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pdftocairo -f <page> -l <page> -svg "<input>" "<output>"
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$ input: exa -1
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% yes, head, file
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# Generate a large text file
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yes "The quick brown fox jumps over the lazy dog" | head -c <size> > <output>
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