Imageoptim vs. optipng4/24/2023 Mozjpeg offers better compression than libjpeg-progs jpegtran. If you don't want to install mozjpeg using the instructions below then use jpegtran: yum install libjpeg-progs Redhat / Fedora yum install optipng gifsicle python-imaging libwebp-tools If you don't want to install mozjpeg using the instructions below then use jpegtran: apt-get install libjpeg-progs You may manually download it and put it in your path at Google's WebP developer website Debian / Ubuntu apt-get install optipng gifsicle python-imaging webp Unfortunately hombrew's webp formula does not yet install the gif2webp tool that picopt uses for converting animated gifs to animated webps. Ln -s $(brew -prefix)/opt/mozjpeg/bin/jpegtran /usr/local/bin/mozjpeg We must install these first macOS brew install webp mozjpeg optipng jonof/kenutils/pngout gifsicle Picopt requires several external system dependencies to run. Comic book archive optimization is not turned on by default to prevent surprises. Be aware that CBR rar archives may only be rezipped into CBZs instead of CBR. Picopt uncompresses, optimizes and rezips comic book archive files. EPub optimization is not turned on by default.ĮPub contents are never converted to other formats because it would break internal references to them. Images within the epub are handled by other programs. EPubĮPub Books are zip files that often contain images and picopt unpacks and repacks this format natively. WebP lossless & lossy formats are optimized with cwebp. Animated GIFĪnimated GIFs are optimized with gifsicle if it is available. Optipng provides the most advantage, but best results will be had by using pngout as well. To optimize PNG images or convert other lossless formats to PNG picopt requires either optipng or pngout be on the path. Picopt needs one of mozjpeg or jpegtran on the path. Picopt will perform some minor optimization on most formats natively without using external programs, but this is not very good compared to the optimizations external programs can provide. Picopt can convert RAR files into Zipfiles and CBR files into CBZ files.Picopt can convert Animated PNGs (APNG) into Animated WebP files, but does not optimize APNG as APNG.Picopt can convert Animated GIFs into Animated WebP files.Picopt can be told to convert lossless images such as BPM, PPM, GIF, TIFF into PNG, and all of the mentioned lossless formats into WebP.Picopt can optionally optimize ZIP, ePub, and CBZ containers.By default picopt will optimize GIF, JPEG, PNG and WEBP images.You must turn on conversion to PNG or WebP explicitly. Conversionīy default picopt does not convert images between formats. There are several situations where this is impractical and so Animated WebP is now a good substitute. Sequenced Images, like animated GIFs and WebP, most of the time, should be converted to a compressed video format like HEVC or VP9. The only downside is that decoding WebP Lossless takes on average 50% more CPU than PNG. As such the best practice is probably to convert all lossless images to WebP Lossless as now all major browsers support it. Lossless WebP images are smaller than PNG, much smaller than GIF and, of course, a great deal smaller thein uncompressed bitmaps like BMP. Converting lossy images rarely makes sense and so picopt only optimizes them in their current format. JPEG & Lossy WebP images are likely the best and most practical lossy image formats. The actual image optimization is best accomplished by external programs. Picopt will optionally drop hidden timestamps at the root of your image directories to avoid reoptimizing images picopt has already optimized. Picopt depends on Python PIL to identify files and Python rarfile to open CBRs. Your contributions are welcome! Please check out/fork the foundation code on GitHub and improve it! Feel absolve to contact me for assistance.A multi-format, recursive, multiprocessor aware, command line lossless image optimizer utility that uses external tools to do the optimizing. ImageOptim is free, open-source software under terms of the GPL v2 or later. You can also drop files on ImageOptim’s Dock icon, or use Services menu in Finder, or launch it from a shell script. Simply drag-drop images or folders into the window! They’ll be optimised in-place. It’s the best for publishing images on the web (easily compress pictures “Saved for Web” in Photoshop) and also helpful for making Mac and iPhone/iPad applications smaller. ImageOptim seamlessly integrates with tons of the best optimisation tools: PNGOUT, Zopfli, Pngcrush, AdvPNG, extended OptiPNG, JpegOptim, jpegrescan, jpegtran, and Gifsicle. ImageOptim optimises images – so they take up less disk space and load faster – by finding best compression parameters and by detaching pointless comments and colour profiles.
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