Questions tagged [mogrify]
15 questions
8
votes
1 answer
How do I batch-downsize images on linux, while keeping small images small?
I have a whole lot of photos and it's time to clean up the mess and free some disk space.
I know mogrify is great to batch-resize things down. The problem is, in some directories I have small images mixed with the big ones. I'd like to…
Gabriel
- 364
7
votes
2 answers
How to crop north and center with morgify in ImageMagick
Is there a way to crop an image centered horizontally, but not centered vertically? For example, here is how I would want an image cropped:
However, using the command mogrify -crop 250x250 -gravity North cat.jpg, I get:
Note I’m going to be doing…
Steven Jeffries
- 383
7
votes
3 answers
mogrify - how do you recurse through subfolders in Windows
I thought there was a simple switch in mogrify command options that tells it go through subfolders as well. I didn't find any. On Linux, the "find" command seems to do the trick, how do you do this on Windows?
magick mogrify -resample 72 -resize…
Regmi
- 855
3
votes
2 answers
ImageMagick's mogrify tool darkens PNGs (when only trying to resize)
I'm trying to use the simple command to resize images and overwrite the originals:
mogrify -resize 80% *
My source images are semi-transparent PNGs that happen to be grayscale. The resize operation works, but is making the images darker.
This used…
Jeff Ward
- 518
3
votes
1 answer
Converting JPEG/PNG to TIFF with Imagemagick format results in a file size about 6.5 times bigger
I am told to use TIFF format for my raster images (originally I have both JPEG and PNG images) according to the editorial office of the journal I am submitting a research paper to.
I tried ImageMagick to convert those images to TIFF format:
magick…
Amazigh_05
- 133
2
votes
1 answer
Normalise levels, contrast, brightness of an image sequence
When making animated gifs or short stop-motion videos from an image sequence, I want them to have all similar levels so that the output looks smooth. It does not have to be a professional quality result, just a simple command to adjust for the…
wim
- 3,327
2
votes
1 answer
ImageMagick Mogrify Compress Images Recursively
Windows 10. ImageMagick v7.1.0-62
I need to compress and optimise a lot of .jpg images using ImageMagick. I am using the following command, which is working (this overwrites the original files which is what I want).
I run this in the windows command…
jonboy
- 231
2
votes
1 answer
ImageMagick - How to avoid overwriting existing files with mogrify?
I have these files under ./:
a.jpg
b.jpg
256/a.jpg
I'm running this command to convert files to 256px:
mogrify -path ./256/ -resize 256x256 *.jpg
But this command always overrides the existing files in 256, such as 256/a.jpg. Even though the…
Hykilpikonna
- 197
1
vote
1 answer
Imagemagick's mogrify can't render text
I'm trying a simple
mogrify test.png -annotate +100+100 '26082015'
on a simple image, and no text is rendered.
I also tried:
mogrify test.png -font courier -fill black -pointsize 20 -annotate +100+100 "26082015"
and
mogrify test.png -gravity…
Nelson Teixeira
- 167
- 11
1
vote
4 answers
How can I run mogrify over the 3 million JPG files?
I have 3 million JPG files stored in a Linux CentOS 6 server.
I want to change quality to %50 file size over 1 megabyte.
I wrote this command but got an "argument list too long" error:
$ find -type f -name "*..jpg" -size +1M | xargs mogrify -quality…
Metin Çelik
- 11
1
vote
1 answer
Invalid arguement error when trying to convert TIFS to JPGS using ImageMagick (across multiple directories)
I am trying to convert and resize some tif files to jpgs using ImageMagick (and move them to a new folder). I've gotten the command to work on individual folders using magick mogrify -format jpg -quality 50% -density 1200 -path "V:\Temp\test2"…
vm72
- 13
- 2
1
vote
2 answers
Does mogrify copy images that fall through resize filter?
I want to run the following command:
mogrify -path /somepath -resize '1600x1600>' *
are Images, that don't exceed the size of 1600x1600 copied to /somepath? (I am asking, since they would fall Through the '1600x1600<' filter)
Greetings Niklas
P.S.:…
niklasfi
- 641
1
vote
2 answers
Convert (compress) JPEG images using mogrify keeping the original files in the same directory
I'm trying to convert(compress) a bunch of JPEG images using imagemagick command mogrify, keeping the original file in the same directory.
I'm typing in terminal window : mogrify -quality 25% *.JPEG con-%002d.JPEG then I get the error : mogrify:…
1
vote
1 answer
Using Imagemagick to convert images to the video: background of the video is black, whereas the background of the pictures are white
I created a movie file from a set of PDF files using:
mogrify -verbose -density 500 -resize 800 -format png ./*.pdf"
convert -delay 600 *.png movie.mp4
on Microsoft Windows 10 (requires Imagemagick and Ghostscript to be installed). The first…
Franck Dernoncourt
- 24,246
- 64
- 231
- 400
0
votes
0 answers
Why does mogrify output more files than what I gave as input
I converted some PDF files to PNG files using:
mogrify -background white -alpha off -verbose -density 1000 -resize 1600 -format png ./*.pdf
on Microsoft Windows 10 (requires Imagemagick and Ghostscript to be installed).
My folder contained…
Franck Dernoncourt
- 24,246
- 64
- 231
- 400