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Advanced conversion options
Advanced conversion options in Conversion settings are the settings of mangaprep, the converter that makes the books. Most of them change the pixels of a page. These pages show how: one real page, converted twice, with only that option different.
Pages about one group of options each
Section titled “Pages about one group of options each”| Page | What it shows |
|---|---|
| Reading | A webtoon-shaped chapter converted as pages and as strips, and the reading direction each book format records |
| Cropping | How much of a page is cut away, in pixels, and what the cut keeps |
| Color and tone | The same page in grayscale and in color, lighter and darker, with the numbers behind the change |
| Double-page spreads | A spread split, kept whole or both, in which order, and what the two-page view writes into an EPUB |
| Size and borders | How a page is fitted to the screen, enlarged, stretched or cropped to fill, and what surrounds it when it is not the screen’s shape |
| Page images | The file each page is saved as: JPEG or PNG, how many grays, and what each costs in bytes |
| Cover | How a book’s cover is made from its first image, which formats have one, and the front of a wide image cut out of it |
| Book metadata | Where each format keeps the title, author and language, what a ComicInfo.xml changes, and when a Kobo book is named .kepub.epub |
Every option
Section titled “Every option”Each option as the app names it, the flags that set it on the command line, and where it is explained. An option you cannot find in the app, such as --dry-run, belongs to the command line alone.
Device and output
Section titled “Device and output”- Device, Book format, Custom width and Custom height:
--profile(-p),--format(-f),--customwidthand--customheight. What the flags do, with the tool’s own output, is in the mangaprep CLI.
Reading
Section titled “Reading”- Content:
--webtoon, or-w. - Manga reading order:
--manga-style, or-m. What it does to a split spread is in Double-page spreads.
Double-page spreads
Section titled “Double-page spreads”- Wide pages:
--splitter, or-r. - Whole spread first:
--rotatefirst. - Keep the whole spread upright:
--norotate. - Rotate clockwise:
--rotateright. - Restack 4-panel strips as 2×2:
--maximizestrips. - Start on the other side:
--spreadshift. - Invert page turns:
--invertdirection. - One page in landscape:
--onepagelandscape.
Size and borders
Section titled “Size and borders”- Page size:
--upscale(-u) for Fit, enlarging small pages,--stretch(-s) for Stretch to the screen,--wallpaperfor Crop to fill the screen. - Borders:
--whitebordersand--blackborders.
Cropping
Section titled “Cropping”- Page cropping:
--cropping, or-c. - Cropping power:
--croppingpower. - Minimum retained area:
--croppingminimum. - Preserved margin:
--preservemargin. - Inter-panel cropping:
--ipc.
Color and tone
Section titled “Color and tone”- Color pages:
--forcecolor. - Autocontrast:
--colorautocontrastand--noautocontrast. - Auto-level black point:
--autolevel. - Gamma:
--gamma, or-g. - Reduce rainbow effect:
--eraserainbow.
Page images
Section titled “Page images”- Page format:
--forcepng. - Keep all 256 grays:
--noquantize. - 8-bit PNG:
--pnglegacy. - Color pages as PNG too:
--force-png-rgb. - JPEG quality:
--jpeg-quality. - Use the images as they are:
--noprocessing.
- Cut the front cover from a wide image:
--smartcovercrop. - Crop the cover to fill the screen:
--coverfill.
Book metadata
Section titled “Book metadata”- Book title and Author:
--title(-t) and--author(-a). - ComicInfo title:
--metadatatitle. - Keep ComicInfo.xml:
--keepcomicinfo. - EPUB language:
--language. - Name the book .epub:
--nokepub.
Tool behavior
Section titled “Tool behavior”- Quiet mode:
--quiet, or-q. - Previewing a conversion, on the command line only:
--dry-run, or-n.
How the examples were made
Section titled “How the examples were made”- The pages come from comics whose authors allow copying: Pepper&Carrot by David Revoy, in color, Go Go! Encyclopedia Girls by Kasuga, in black and white, and a page by Polylerus with a black background. The credits and licences are at the end of this page, and under every picture.
- The conversion is the mangaprep that Manga2Ink ships, started from Manga2Ink’s starting settings: Kindle Paperwhite 6 (1272 × 1696 pixels), CBZ, manga reading order, double-page spreads kept both ways, small pages enlarged, margins and page numbers cropped. Only the option named in the caption is different between two pictures.
- The captions give the setting as the app names it, the flag that setting passes to mangaprep when you run it from a terminal (
no flagis the default), and the size of each page mangaprep wrote (not convertedis a picture of the input). Click a picture to open it larger. - The tables of values are not pictures: the title, author, language, reading direction and file name in them were read back from the book mangaprep wrote, converted with the same starting settings unless a row says otherwise.
- What is not shown. The free black-and-white manga there is has little printed screentone, so what depends on it, such as moiré, is described and not pictured. Pictures show pixels on your screen, not the e-ink screen of a reader.
Credits and licences
Section titled “Credits and licences”- Pepper&Carrot, episodes 1 and 6, by David Revoy (www.davidrevoy.com), CC BY 4.0. Source: the Internet Archive.
- Go Go! Encyclopedia Girls, pages 2, 3 and 4, by Kasuga, English version by Masatami, CC BY-SA 4.0. Source: Wikimedia Commons, page 3, page 4.
- Wikipe-tan Battling a Wikitroll in the Darknesses of Ignorance by Polylerus, CC BY 2.5. The file offers a choice of GFDL, CC BY-SA 3.0 and CC BY 2.5; this one is used. Source: Wikimedia Commons.
The pictures on these pages are adaptations of those pages (converted, cropped, resized and, in the diagrams of the Double-page spreads page, placed in frames with numbers and arrows), and keep the licence of the page they come from: the ones made from Go Go! are CC BY-SA 4.0, the ones made from Pepper&Carrot are CC BY 4.0, and the ones made from the Wikipe-tan page are CC BY 2.5. Where an example joins pages, into a strip or into a spread, the page that uses it says so.
How the pictures are made and checked is in the maintainers’ notes.