christoph/flake-nixinator
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ffmpeg cheats

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Christoph Urlacher
2022-11-20 16:39:11 +01:00
parent fe05d3b670
commit 450e01e0c4
1 changed files with 20 additions and 3 deletions
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config/navi/christoph.cheat
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@ -10,20 +10,37 @@ $ flake: echo -e "nixinator\nnixtop"
# Find out why a package is included in the closure when building the system derivation # Find out why a package is included in the closure when building the system derivation
nix why-depends /run/current-system nixpkgs#<package> nix why-depends /run/current-system nixpkgs#<package>
; TODO: Autocomplete executable, list everything in path
% nixos, nix-store, storepath, link % nixos, nix-store, storepath, link
# Find the storepath of an executable in the users path # Find the storepath of an executable in the users path
readlink -f $(which <executable>) readlink -f $(which <executable>)
; TODO: Autocomplete executable, list everything in path
% nixos, nix-store, storepath, libraries % nixos, nix-store, storepath, libraries
# Find the wanted dynamic libraries of an executable in the users path # Find the wanted dynamic libraries of an executable in the users path
ldd $(readlink -f $(which <executable>)) ldd $(readlink -f $(which <executable>))
% shell, process % shell, process
# Launch a detached process with suppressed output # Launch a detached process with suppressed output
<command> &>/dev/null & <command> &>/dev/null &
; TODO: Filter out directories from input autocomplete (if there are no directories basic grep doesn't work, always needs a pattern)
% ffmpeg, slowmo % ffmpeg, slowmo
# Create a slow motion version of a video with interpolated/blended frames # Create a slow motion version of a video with interpolated/blended frames
ffmpeg -i <input>.mp4 -filter:v "minterpolate='mi_mode=mci:mc_mode=aobmc:vsbmc=1:fps=<doublefps>',setpts=2*PTS" output.mp4 ffmpeg -i <input> -filter:v "minterpolate='mi_mode=mci:mc_mode=aobmc:vsbmc=1:fps=<doublefps>',setpts=2*PTS" output.mp4
$ input: exa -1
% ffmpeg, cropdetect
# Detect black bar dimensions automatically by looking at the first 10 frames
ffmpeg -i <input> -vframes 10 -vf cropdetect -f null -
$ input: exa -1
% ffmpeg, cropdetect, preview
# Preview video with applied crop settings
ffplay -vf crop=<width>:<height>:<x>:<y> <input>
$ input: exa -1
% ffmpeg, cropdetect, render
# Re-encode the video with applied crop settings
ffmpeg -i <input> -vf crop=<width>:<height>:<x>:<y> -c:a copy output.mp4
$ input: exa -1