Command line notes – a collection of useful one-liners

cl.sh

# Copyright 2019 A. H.

#  Permission is hereby granted, free of charge, to any person obtaining a 
#  copy of this software and associated documentation files (the "Software"), 
#  to deal in the Software without restriction, including without limitation 
#  the rights to use, copy, modify, merge, publish, distribute, sublicense, 
#  and/or sell copies of the Software, and to permit persons to whom the 
#  Software is furnished to do so, subject to the following conditions:
#
#  The above copyright notice and this permission notice shall be included in 
#  all copies or substantial portions of the Software.
#
#  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 
#  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
#  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
#  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
#  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
#  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
#  DEALINGS IN THE SOFTWARE.

# RENAME

# Replace a string in all file names in a folder
rename 's/old/new/' * 


# EXIFTOOL

# Add coordinates to images in folder from gpx file
exiftool -P -overwrite_original -geotag=track.gpx /path/to/images

# Name files according to EXIF date and timestamp
exiftool -ext jpg -ext mp4 '-filename<CreateDate' -d '%Y-%m-%d %H.%M.%S%%-c.%%e' ../exiftool_test/

# Delete all EXIF information
exiftool -all= foo.jpg

# Modify file modification/creation date to match EXIF data
exiftool '-DateTimeOriginal>FileModifyDate' foo.jpg

# Modify EXIF creation date to match filename for files in this folder
exiftool "-createdate<filename" "-datetimeoriginal<filename" -overwrite_original_in_place ./

# Shift all timestamps of pictures
exiftool -AllDates-=1:10 -filemodifydate-=1:10 -P -overwrite_original *.jpg

# Retrieve original file number (e.g. IMG_007.jpg from the FileNumber exif field and use as filename
exiftool '-filename<$FileNumber.%e' *.jpg


# FFMPEG 

# Combine image files as video
cat *.jpg | ffmpeg -f image2pipe -r 24 -vcodec mjpeg -i - -vcodec libx264 out.mp4

# Trim video from -ss to length -t
ffmpeg -i input.mp4 -ss 00:29:21 -t 00:02:26 -async 1 -c copy output.mp4 

# convert .mov from fcpx into much smaller mp4
ffmpeg -i input.mov -c:v libx264 -c:a aac -strict experimental output.mp4


# YOUTUBE-DL

# Download with subtitles
youtube-dl url -o output.mp4 --write-sub

# Download audio only from
youtube-dl -f 'bestaudio[ext=m4a]' 'http://youtu.be/videoid'


# GHOSTSCRIPT

# Convert all text to curves in PDF
gs -o file-with-outlines.pdf -dNoOutputFonts -sDEVICE=pdfwrite input-file.pdf


# MKGMAP 

# Combine multiple img files into one
java -jar mkgmap.jar --gmapsupp a.img b.img c.img typ.TYP 


# MP3INFO

# Print mp3 file names with track lengths of files in current folder
mp3info -p "%f: %m:%02s\n" *.mp3

# Print the total length of all mp3 files in a folder (in minutes)
# (corrected version of https://superuser.com/a/947201)
for file in *.mp3; do mp3info -p "%S\n" "$file"; done | paste -sd+ - | sed 's+\(.*\)+(\1)/60+' | bc
# in hh:mm:ss format (https://stackoverflow.com/a/54541337) 
for file in *.mp3; do mp3info -p "%S\n" "$file"; done | paste -sd+ - | bc | dc -e '?1~r60~r60~r[[0]P]szn[:]ndZ2>zn[:]ndZ2>zn[[.]n]sad0=ap'


# FLUIDSYNTH

# Convert a folder of midis to wav using a soundfont
for filename in ./*.mid; do
    fluidsynth -F "$(basename "$filename" .mid).wav" soundfont.sf2 "$filename"
done


# ZIP

# remove mac-related files from zip archives
zip -d filename.zip __MACOSX/\* \*/.DS_Store