blocks|key|691638|text|据我所知，convert被设计为只处理一个输入文件，尽管我必须承认我不理解您得到的输出。mogrify更适合于以下样式的批处理：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|691639|mogrify+-path+../dsc_small+-define+jpeg:extent=2MB+dsc_big/*|code-block|syntax|javascript|691640|但老实说，我认为这对于一般的使用是危险的(如果你忘记了-path，它会覆盖原始图像)，所以我总是使用convert和一个for循环来实现：|691641|for+file+in+dsc_big/*;+do+convert+$file+-define+jpeg:extent=2MB+dsc_small/`basename+$file`;+done|691642|如果您正在处理当前目录中的文件，则不需要使用basename调用。|691643|entityMap|0|LINK|mutability|MUTABLE|url|http://www.imagemagick.org/Usage/basics/#mogrify^0|5|7|18|7|0|0|0|R|5|1E|7|0|0|M|8|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@$9|11|A|12|1|13]]|E|$]]|$1|F|3|G|5|H|7|14|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|15|8|@$9|16|A|17|B|C]|$9|18|A|19|B|C]]|D|@]|E|$]]|$1|M|3|N|5|H|7|1A|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|1B|8|@$9|1C|A|1D|B|C]]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|1E|8|@]|D|@]|E|$]]]|R|$S|$5|T|U|V|E|$W|X]]]]

<code>convert</code> is designed to handle a single input file as far as I can tell, although I have to admit I don't understand the output you're getting. <a href="http://www.imagemagick.org/Usage/basics/#mogrify" rel="noreferrer">mogrify</a> is better suited for batch processing in the following style:

<pre><code>mogrify -path ../dsc_small -define jpeg:extent=2MB dsc_big/*
</code></pre>

But honestly I consider it dangerous for general usage (it'll overwrite the original images if you forget that <code>-path</code>) so I always use <code>convert</code> coupled with a for loop for this:

<pre><code>for file in dsc_big/*; do convert $file -define jpeg:extent=2MB dsc_small/`basename $file`; done
</code></pre>

The <code>basename</code> call isn't necessary if you're processing files in the current directory.

blocks|key|691705|text|虽然这是一个古老的问题，但我添加这个回答是为了让任何其他偶然发现这个问题的人受益。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|691706|我也遇到了同样的问题，并且对使用mogrify感到沮丧，于是我编写了一个名为easymagick的基于Python的小实用程序，以便在内部使用convert命令时简化此过程。|offset|length|style|CODE|691707|请注意，这仍然是一项正在进行的工作。如果能得到任何形式的反馈，我将不胜感激。|691708|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/danishm/easymagick^0|0|G|7|1Z|7|12|A|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@$D|T|E|U|F|G]|$D|V|E|W|F|G]]|9|@$D|X|E|Y|1|Z]]|A|$]]|$1|H|3|I|5|6|7|10|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|Q]]]]

Although this is an old question, but I'm adding this response for the benefit of anyone else that stumbles upon this.

I had the same exact issue, and being discouraged by the use of <code>mogrify</code>, I wrote a small Python based utility called <a href="https://github.com/danishm/easymagick" rel="nofollow">easymagick</a> to make this process easier while internally using the <code>convert</code> command. 

Please note, this is still a work in progress. I'll appreciate any kind of feedback I can get.

blocks|key|475594|text|这对我很管用|type|unstyled|depth|inlineStyleRanges|entityRanges|data|475595|convert+-rotate+90+*.png+rotate/image.jpg+|code-block|syntax|javascript|475596|生成image-0.jpg、image-1.jpg、image-2.jpg+.....在“旋转”文件夹中。不过，我不知道有什么方法可以保留原始文件名。|475597|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

This works for me

<pre><code>convert -rotate 90 *.png rotate/image.jpg 
</code></pre>

produces image-0.jpg, image-1.jpg, image-2.jpg ..... in the 'rotate' folder. Don't know of a way to preserve the original filenames though.

blocks|key|691822|text|我找到了bash+-ing到所需的文件夹，然后使用bash全局变量$PWD使我的convert不会抛出任何错误。我正在利用ImageMagick最近实现的caption:+http://www.imagemagick.org/Usage/text/#caption函数来用基本文件名标记我的图像，并将它们放在第一个文件中的另一个目录中。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|691823|cd+~/person/photos
mkdir+labeled
for+f+in+$PWD/*.JPG;+do
++++width=$(identify+-format+%25w+$f)
++++filename=$(basename+$f+.JPG)
convert+-background+'#0008'+-colorspace+transparent+-fill+white+-gravity+center+-size+${width}x100++caption:"${filename}"+${f}+%2Bswap+-gravity+south+-composite+"$PWD/labeled/${filename}.jpg";
done|code-block|syntax|javascript|691824|entityMap|0|LINK|mutability|MUTABLE|url|http://www.imagemagick.org/Usage/text/#caption^0|X|4|14|7|25|8|2E|1A|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]|$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@$9|Z|A|10|1|11]]|E|$]]|$1|F|3|G|5|H|7|12|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|13|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]]]

I found that <code>cd</code>-ing into the desired folder, and then using the bash global variable <code>$PWD</code> made my <code>convert</code> not throw any errors. I'm utilizing ImageMagick's recently implemented <code>caption:</code> <a href="http://www.imagemagick.org/Usage/text/#caption" rel="nofollow">http://www.imagemagick.org/Usage/text/#caption</a> function to label my images with the base filename and place them in another directory within the first.

<pre><code>cd ~/person/photos
mkdir labeled
for f in $PWD/*.JPG; do
 width=$(identify -format %w $f)
 filename=$(basename $f .JPG)
convert -background '#0008' -colorspace transparent -fill white -gravity center -size ${width}x100 caption:"${filename}" ${f} +swap -gravity south -composite "$PWD/labeled/${filename}.jpg";
done
</code></pre>

blocks|key|475746|text|经过长时间的尝试，这条命令帮了我大忙。我想从一大堆不同宽度和高度的大图片中制作相同大小的缩略图。这是为了创建一个画廊页面。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|475747|convert+-define+jpeg:size=250x200+*.jpg++-thumbnail+250x200%5E+-gravity+center+-extent+250x200++crop/thumbnail-%25d.jpeg|code-block|syntax|javascript|475748|我得到了重新调整大小的缩略图，它们都具有相同的宽度和高度。:)感谢ImageMagick。|475749|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

This was the command which helped me after a long try.
I wanted to make same sized thumbnails from a big list of large images which have variable width and height . It was for creating a gallery page.

<pre><code>convert -define jpeg:size=250x200 *.jpg -thumbnail 250x200^ -gravity center -extent 250x200 crop/thumbnail-%d.jpeg
</code></pre>

I got re-sized thumbnails which all having same width and height. :) thanks to ImageMagick.

I have a folder of images over <code>4MB</code> - let's call this folder <code>dsc_big/</code>. I'd like to use <code>convert -define jpeg:extent=2MB</code> to convert them to under <code>2MB</code> and copy <code>dsc_big/*</code> to a folder <code>dsc_small/</code> that already exists.

I tried <code>convert dsc_big/* -define jpeg:extent=2MB dsc_small/</code> but that produces images called <code>-0</code>, <code>-1</code>, and so on.

What do I do?

Batch resize images into new folder using ImageMagick

Python

我在4MB上有一个包含图片的文件夹-让我们称这个文件夹为dsc_big/。我想使用convert -define jpeg:extent=2MB将它们转换到2MB下，并将dsc_big/*复制到已经存在的dsc_small/文件夹中。我尝试过convert dsc_big/* -define jpeg:extent=2...

问使用ImageMagick批量调整图像到新文件夹的大小
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