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Commands
This is an ongoing list of commands that I’m probably going to use a lot, as an overview for easy reference.
Git commands
| Command | Description | Example |
|---|---|---|
| cd | Change directory | cd C:\Users\mvoss\Pictures\temp\ |
| pwd | Get current directory | |
| ls | List all files and folders in current directory | |
| copy, cp | Copies an item from one location to another | cp *.jpg* -Destination "~/Documents\Gitlab\fabacademy\michelle-vossen\assets\images\weeks\week1" |
| mkdir | Make a new directory | mkdir week2 |
ImgMagick
| What it does | Command |
|---|---|
| adjust extension | magick convert img.jpg img.png |
| resize | magick mogrify -resize “800>” .jpg |
| quality | magick mogrify -quality 75% .jpg |
| convert all images from one extension to another (png to jpg) | magick mogrify -format jpg .png |
ffmpeg
| What it does | Command |
| Convert mov to mp4 | ffmpeg -i input.mov -q:v 0 output.mp4 |
| Compress mp4 (you can change the 500k to another number and the scale as well to lower or increase the size) | ffmpeg -i input.mp4 -vcodec libx264 -b:v 500k -vf scale=-2:500 -an output.mp4 |
| Speed up mp4 (lower number is faster; it drops frames so that’s good for compression) | ffmpeg -i input.mp4 -filter:v “setpts=0.06*PTS” output.mp4 |
| Rotate video clockwise | ffmpeg -i in.mov -vf “transpose=1” out.mov |
| Powershell command for batch ffmpeg (you have to be in the folder that has the videos that have to be compressed) | Get-ChildItem *.mp4 -recurse | % { ffmpeg -i $_.FullName -vcodec libx264 -b:v 500k -vf scale=-2:500 -an ("C:\Users\mvoss\Pictures\temp\batch" + "\" +$_.Name) } |
Powershell
| What it does | Command | |
| Renaming all files in a folder (note: this only works if the file extensions are jpg, change accordingly; there are more elegant ways to do it but this was my rush solution; can work nicely after changing all extensions to jpg with ImgMagick anyway) | [ref]$i = 1; gci -file | Rename-Item -NewName {‘{0:D4}.jpg’ -f $i.Value++, $_} |
| Giving a preview of what a command is going to do | -whatif |
esptool
esptool --port com25 --baud 115200 --chip esp32c3 read_mac