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I have to convert DPI of more than 5k Tiff images on a monthly basis from 200x200 to 100x100. I can do that in Irfan view using a .bat file that i have created.. the following is the .BAT file code

@"c:\program files\irfanview\i_view32.exe" "e:\batch1*.tif /aspectratio /resample /tifc=4 /dpi=(100,100) /convert=e:\batch2*.tif" %*

Where tifc=4 is Fax 4 compression

However, the above code doesn't help me change the DPI for other pages except for Only the first page in the tiff thats getting converted to 100 DPI. Rest all pages are still 200 DPI. I am using WinXP Professional and Irfan View. Can anyone tell me what I am missing. Or any other alternative program where I can create a .bat file and run the batch process using Command line?

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You certainly can access the setting (affect all layers for tiffs, bottom right corner) in Advanced Options at batch menu dialog. So, the functionality is already there.Wether it's already ported to command line options, I don't know, might be not documented.

Another solution that could help (neither tried) is Imagemagick, download at www.imagemagick.org. It is a free command line editor/converter.

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Its not helping me S.gfx. When i use the Advance Options at the Batch menu, its only publishing one page instead of the 10 pages that I already have. – hemalshah Feb 15 '11 at 12:38
Further more, I wish to have this as a Batch Conversion. I havent tried ImageMagick but will try that one too.. I read somewhere that applying the conversion settings to all pages on the command line isnt possible, however I can set up a process for each page. That, is not going to work when I have more than a 1000 files to be processed. I will try ImageMagick and see if it works for me... Thanks for your time. – hemalshah Feb 15 '11 at 12:40
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