Commands tagged jpg sorted by votes

Commands tagged jpg (12)

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Rename all .jpeg and .JPG files to have .jpg extension

the "i" controls case sensitiveness. It's slightly inefficient since it uselessly renames .jpg to .jpg, but that's more than compensated by launching only one process instead of two, besides being shorter to write.
This is sample output - yours may be different.
16

rename 's/\.jpe?g$/.jpg/i' *

icebrain · 2010-11-14 21:22:13 6
for all flv files in a dir, grab the first frame and make a jpg.

This is handy for making screenshots of all your videos for referring to in your flv player.
This is sample output - yours may be different.
12

for f in *.flv; do ffmpeg -y -i "$f" -f image2 -ss 10 -vframes 1 -an "${f%.flv}.jpg"; done

topher1kenobe · 2009-05-18 22:34:59 8
Find jpeg images and copy them to a central location

Use if you have pictures all over the place and you want to copy them to a central location Synopsis: Find jpg files translate all file names to lowercase backup existing, don't overwrite, preserve mode ownership and timestamps copy to a central location
This is sample output - yours may be different.
4

find . -iname "*.jpg" -print0 | tr '[A-Z]' '[a-z]' | xargs -0 cp --backup=numbered -dp -u --target-directory {location} &

oracular · 2009-12-10 08:47:04 5
Extracts PDF pages as images
This is sample output - yours may be different.
1

convert in.pdf out.jpg

ivanatora · 2010-02-26 10:51:33 3
Rename all .jpeg and .JPG files to .jpg
This is sample output - yours may be different.
1

rename 's/\.jpeg/\.jpg/' *.jpeg; rename 's/\.JPG/\.jpg/' *.JPG

unixmonkey14095 · 2010-11-14 11:47:04 4
Regnerate Exif thumbnail.

Regnerate Exif thumbnail.
This is sample output - yours may be different.
1

jhead -rgt file-name.jpg

fabio · 2014-05-09 08:36:12 8
sync a directory of corrupted jpeg with a source directory

Find all corrupted jpeg in the current directory, find a file with the same name in a source directory hierarchy and copy it over the corrupted jpeg file. Convenient to run on a large bunch of jpeg files copied from an unsure medium. Needs the jpeginfo tool, found in the jpeginfo package (on debian at least).
This is sample output - yours may be different.
0

for i in *jpg; do jpeginfo -c $i | grep -E "WARNING|ERROR" | cut -d " " -f 1 | xargs -I '{}' find /mnt/sourcerep -name {} -type f -print0 | xargs -0 -I '{}' cp -f {} ./ ; done

vincentp · 2009-05-07 00:30:36 4
Converts all jpg files to 75 quality.

Requires ImageMagick to be installed. This command was stolen from @climagic on Twitter. Probably a duplicate of command below, but this command uses slightly higher quality. http://www.commandlinefu.com/commands/view/707/compress-images-using-convert-imagemagick-in-a-bulk
This is sample output - yours may be different.
0

find . -type f -name '*.jpg' -exec convert -quality 75 {} {} \;

bobby_tables · 2011-09-23 13:51:18 4
converts an A4 PDF file to accurate jpgs
This is sample output - yours may be different.
0

pdf2jpg(){ convert -density 400 -bordercolor white -border 0 -resize 992x1403 -quality 85 $1 ${1/%pdf/jpg} ; }

return13 · 2012-11-08 15:28:18 5
List image attributes from a folder of JPEG images

Runs the identify command (from ImageMagick) on each jpg file in the current directory and returns image details according to the format parameter. The example here returns: Filename FileSize Compression Width Height More information about the available format options can be found here: http://www.imagemagick.org/script/escape.php I usually redirect the output to a text file using "> listofdetails.txt" at the end. Spreadsheet magic can then be applied. Show Sample Output
This is sample output - yours may be different.
```
402670154.jpg 20095B 80 600 400
402670164.jpg 47173B 80 600 600
402670174.jpg 88055B 95 800 800
402680421.jpg 45769B 80 586 388
402680424.jpg 45769B 80 586 388
402680442.jpg 160137B 99 600 600
```
0

for file in *.jpg; do identify -format '%f %b %Q %w %h' $file; done

phattmatt · 2012-11-16 10:06:35 6
Convert Canon CR2 raw pictures to JPG

This command takes all CR2 files in the current directory and convert them into JPG
This is sample output - yours may be different.
0

for i in *.CR2; do dcraw -c -a -h $i | ppmtojpeg > `basename $i CR2`JPG; echo $i done; done

optyler · 2013-07-25 14:58:15 5
Split an image in half for use on dual screens (mostly for use under KDE which treats each screen separately)

Output should be two JPG files named like "output-1.jpg" and "output-2.jpg". The convert command is part of ImageMagick so you'll need that and dependent packages installed to use it.
This is sample output - yours may be different.
0

convert yourdoublewideimage.jpg -crop 50%x100% +repage output.jpg

pagesix1536 · 2014-01-15 15:34:41 8

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Get ethX mac addresses

I much prefer using /sbin/ip over /sbin/ifconfig for most everything. I find the interface and output to be much more consistent and it has many abilities that ifconfig, route, etc. do not. To get the mac address for only one interface, add 'show dev [interface]' to the 'ip link' part of the command: ip link show dev eth0 | grep 'link/ether' | awk '{print $2}' . Also, both this command and the ifconfig one do not require root access to run, so the sudo is not necessary.

analyze traffic remotely over ssh w/ wireshark

Please check out my blog article on this for more detail. http://jdubb.net/blog/2009/08/07/monitor-wireshark-capture-real-time-on-remote-host-via-ssh/

Convert CSV to JSON

Replace 'csv_file.csv' with your filename.

List files

Shortcut to list files in the current path.

Find last modified files in a directory and its subdirectories

Goes through all files in the directory specified, uses `stat` to print out last modification time, then sorts numerically in reverse, then uses cut to remove the modified epoch timestamp and finally head to only output the last 10 modified files. Note that on a Mac `stat` won't work like this, you'll need to use either: $ find . -type f -print0 | xargs -0 stat -f '%m%t%Sm %12z %N' | sort -nr | cut -f2- | head or alternatively do a `brew install coreutils` and then replace `stat` with `gstat` in the original command.

Find usb device in realtime

Using this command you can track a moment when usb device was attached.

redirect stdout and stderr each to separate files and print both to the screen

Converts all windows .URL shortcuts in a directory to linux (gnome) .desktop shortcuts

Convert seconds to [DD:][HH:]MM:SS

Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

An alarm clock using xmms2 and at

I like the order of the arguments better this way.

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Commands tagged jpg (12)

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