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looking and cant find the perfect one.
i have 100 gig of 4K image-sequence to process.

found imagizer2 on sourceforge. multi-thread but not 64bit (does matter?).
i guess the fastest one will be using intel's IPP image core lib .

i am on windows, but if some crazy fast linux option is available i'll consider (benchmarks?).

included benchmarks i ran on a test batch of 100 5k (4.3MB) files

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You mentioned image sequence - do you want to process individual images, or combine them into video sequences? If the latter, I would do the transformations during production with virtualdub. – Andy Lee Robinson Jul 27 '11 at 20:55
yes, my orginal plan was to do this all in command line using ffmpeg ffmpeg -i d:\g\25\g_%%04d.jpg -r 15 -s hd720 -vcodec libx264 -fpre "libx264-hq.ffpreset" -crf 16 Day01_720.mp4 but fmpeg is hard coded to support images no larger then 5012pixels. hence the resize. – yoshco Jul 27 '11 at 21:56
i actually prefer avisynth for image sequence work, its so powerful. – yoshco Jul 27 '11 at 21:57
Penny drops! 4K line film quality images, not 4kb images! Yes, avisynth is great and supplied with virtual dub. ffmpeg is open source, so the 5012 pixel limit can be modified and recompiled, or the authors could increase the default limit. It shouldn't be difficult. – Andy Lee Robinson Jul 28 '11 at 21:26
adding more benchmakrs: VIPS and GraphicsMagick vips.ecs.soton.ac.uk/index.php?title=Speed_and_Memory_Use – yoshco Mar 14 at 17:03
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3 Answers

up vote 4 down vote accepted

Check out these programs:

  1. Batch Picture Resizer.
  2. Image Resizer.

Resizing images using batch files: Batch Resize.

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i took 100 5k pictures: batch picture resizer = 30sec imagizer2 = 64sec – yoshco Jul 27 '11 at 19:10
Try this one: Fast Image Resizer (adionsoft.net/fastimageresize). This one also seems promising: obviousidea.com/windows-software/light-image-resizer – Jay Mahendru Jul 27 '11 at 19:14
Fast image sizer= 110 sec – yoshco Jul 27 '11 at 19:18
light-image-resizer is crapware – yoshco Jul 27 '11 at 19:25
False advertising then. Try the batch method I put in the edited comment. If that doesn't help then I'm out of options. Otherwise, if the batch picture resizer took 30 sec, to resize 500 MB word of images (assuming each of the 100 images was 5 Mb. ea), it should take 1 hour, 40 minutes to resize all of the 100 GB of pics you have. That's not too bad? – Jay Mahendru Jul 27 '11 at 19:25
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up vote 3 down vote

Not sure how it will compare in the benchmark dept but you may want to give ImageMagick a try using the "convert" or "mogrify" tools. It sounds like it makes good use of 64 bit, number of cores and such.
All I know is that it is really powerful and feature full. I can resize in place or add options like resample filters and file type conversions.

mogrify -format jpg -filter Cubic -resize 20%x20% rgb-?.png
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i love cmd, but im also benchmark junky... mageMagick-6.7.1-Q16x64 = 149sec – yoshco Jul 27 '11 at 20:07
I guess I'm not surprised as it seems ImageMagick is more the Swiss army knife than the scalpel. Well done on the question and benchmarks. – Dennis Jul 27 '11 at 21:05
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up vote 2 down vote

I'm using IrfanView for converting 1 GB of tiff files to smaller GIF ones each night. Takes only some minutes.

A sample command woulöd look like this (I use this to convert pictures for my digital photo display)

"C:\Program Files (x86)\IrfanView\i_view32.exe" "C:\Pictures\Best\*.jpg" /resample=(720,540) /aspectratio /convert="C:\Temp\miniDisp\*_rsz.jpg"

This does resize all JPG files from C:\Picutres\Best\ to 720x540 and save them as C:\Temp\miniDisp\ OrgFilename_rsz.jpg.

The command line switches IrfanView understands can be found inside the online help (see Index - Command line options) or online here

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irfan is also my day to day tool, but irfan = 80sec for same test. – yoshco Jul 27 '11 at 19:22
Well, that's really long compared with the other programs. Thanks for the tests. – TeX HeX Jul 27 '11 at 19:34
irfanview also my viewer and batch processor of choice though virtualdub is also an essential tool. It could be used to combine image sequences into a video with the benefit of delta compression, and an image could be retrieved by indexing a frame. – Andy Lee Robinson Jul 27 '11 at 20:51
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