I converted a number of files from JP2 to PNG, all greyscale, and I am trying to compress them using the RIOT plugin but I am not having any luck! Also, as one of the options of Riot is to work with advpng, and this doesn't exist in the plugins directory, nor can it find the file to download. The upload requirement is PNG and they are too large. The .PNG images after compression are larger than before. I also installed the RIOT standalone software but this is no different. Can someone help please? Thanks.
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Try selecting the PNGOUT plugin from the Save as PNG dialogue. Its slow but should give good compression.Before you post ... Edit your profile • IrfanView 4.62 • Windows 10 Home 19045.2486
Irfan Paint • Irfan View Help • IrfanPaint Help • Riot.dll • More Skins • FastStone Capture • Uploads
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Originally posted by Bhikkhu Pesala View PostTry selecting the PNGOUT plugin from the Save as PNG dialogue. Its slow but should give good compression.Irfanview 4.54, Win 10 Pro 64bit 16gb RAM, Intel UHD graphics
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PNG Crush gets good compression much faster than PNGOUT, but you will need to run a rename utility afterwards. That's workable on large numbers of images. I use it to optimise a hundred or so images at a time for Opera skins.- I select the folder of images in Explorer
- I run PNG crush which takes a minute or so on a hundred images. It adds a 2 to the filename.
- I move the new images to C:\TEMP
- I rename the new images
- I select all to check that they did actually get smaller than the originals
- I move them back and overwrite the originals
Last edited by Bhikkhu Pesala; 29.04.2011, 05:29 AM.Before you post ... Edit your profile • IrfanView 4.62 • Windows 10 Home 19045.2486
Irfan Paint • Irfan View Help • IrfanPaint Help • Riot.dll • More Skins • FastStone Capture • Uploads
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RIOT developer
visit the Radical Image Optimization Tool website
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Originally posted by luciansabo View PostFor usage of advpng with RIOT just download and install advpng.exe and it’s dependency – zlib.dll – in the plugins folder.Irfanview 4.54, Win 10 Pro 64bit 16gb RAM, Intel UHD graphics
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advpng has nothing to do with IrfanView. It is now an IrfanView plugin. You need to put it there for RIOT as will be used only be RIOT. Please update RIOT to the latest version from the official website.RIOT developer
visit the Radical Image Optimization Tool website
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