ragodev / cbconvert

CBconvert is a Comic Book converter

CBconvert

Introduction

CBconvert is a Comic Book converter written in Go language.

It can convert one comic at a time or bulk convert comics to different formats to fit your various devices.

Features

• reads RAR, ZIP, 7Z, GZ, BZ2, CBR, CBZ, CB7, CBT, PDF, EPUB, XPS and plain directory
• always saves processed comic in CBZ (ZIP) archive format
• images can be converted to JPEG, PNG, GIF, TIFF or 4-Bit BMP (16 colors) file format
• rotate, flip, adjust brightness/contrast, adjust levels (Photoshop like) or grayscale images
• choose resize algorithm (NearestNeighbor, Box, Linear, MitchellNetravali, CatmullRom, Gaussian, Lanczos)
• export covers from comics
• create thumbnails from covers by freedesktop specification

Download

• Windows GUI

• Windows CMD

• Linux 64bit GUI

• Linux 64bit CMD

Using cbconvert in file managers to generate freedesktop thumbnails

Just copy cbconvert cmd binary to your PATH and create file ~/.local/share/thumbnailers/cbconvert.thumbnailer :

[Thumbnailer Entry]
TryExec=cbconvert
Exec=cbconvert thumbnail --quiet --width %s --outfile %o %i
MimeType=application/pdf;application/x-pdf;image/pdf;application/x-cbz;application/x-cbr;application/x-cb7;application/x-cbt;application/oxps;application/vnd.ms-xpsdocument;application/epub+zip;

This is how it looks like in PCManFM file manager:

Using command line app

usage: cbconvert [<flags>] <command> [<args> ...]

Comic Book convert tool.

Flags:
  --help               Show context-sensitive help (also try --help-long and --help-man).
  --version            Show application version.
  --outdir="."         Output directory
  --size=0             Process only files larger then size (in MB)
  --recursive          Process subdirectories recursively
  --quiet              Hide console output

Args:
  <args>  filename or directory

Commands:
  help [<command>...]
    Show help.


  convert [<flags>] <args>...
    Convert archive or document (default command)

    --width=0            Image width
    --height=0           Image height
    --fit                Best fit for required width and height
    --format="jpeg"      Image format, valid values are jpeg, png, gif, tiff, bmp
    --quality=75         JPEG image quality
    --filter=2           0=NearestNeighbor, 1=Box, 2=Linear, 3=MitchellNetravali, 4=CatmullRom, 6=Gaussian, 7=Lanczos
    --cover              Convert cover image (use --no-cover if you want to exclude cover)
    --rgb                Convert images that have RGB colorspace (use --no-rgb if you only want to convert grayscaled images)
    --nonimage           Leave non image files in archive (use --no-nonimage to remove non image files from archive)
    --grayscale          Convert images to grayscale (monochromatic)
    --rotate=0           Rotate images, valid values are 0, 90, 180, 270
    --flip="none"        Flip images, valid values are none, horizontal, vertical
    --brightness=0       Adjust brightness of the images, must be in range (-100, 100)
    --contrast=0         Adjust contrast of the images, must be in range (-100, 100)
    --suffix=SUFFIX      Add suffix to file basename
    --levels-inmin=0     Shadow input value
    --levels-inmax=255   Highlight input value
    --levels-gamma=1     Midpoint/Gamma
    --levels-outmin=0    Shadow output value
    --levels-outmax=255  Highlight output value

  cover [<flags>] <args>...
    Extract cover

    --width=0     Image width
    --height=0    Image height
    --fit         Best fit for required width and height
    --quality=75  JPEG image quality
    --filter=2    0=NearestNeighbor, 1=Box, 2=Linear, 3=MitchellNetravali, 4=CatmullRom, 6=Gaussian, 7=Lanczos

  thumbnail [<flags>] <args>...
    Extract cover thumbnail (freedesktop spec.)

    --width=0   Image width
    --height=0  Image height
    --fit       Best fit for required width and height
    --filter=2  0=NearestNeighbor, 1=Box, 2=Linear, 3=MitchellNetravali, 4=CatmullRom, 6=Gaussian, 7=Lanczos

man page is also available:

cbconvert --help-man | man /dev/stdin

Examples

Rescale images to 1200px for all supported files found in directory with size larger then 60MB:

cbconvert --recursive --width 1200 --size 60 /media/comics/Thorgal/

Convert all images in pdf to 4bit BMP image and save result in ~/comics directory:

cbconvert --bmp --outdir ~/comics /media/comics/Garfield/Garfield_01.pdf

BMP format is very good choice for black&white pages. Archive size can be smaller 2-3x and file will be readable by comic readers.

Generate thumbnails by freedesktop specification in ~/.thumbnails/normal directory with width 512:

cbconvert thumbnail --width 512 --outdir ~/.thumbnails/normal /media/comics/GrooTheWanderer/

Extract covers to ~/covers dir for all supported files found in directory, Lanczos algorithm is used for resizing:

cbconvert cover --outdir ~/covers --filter=7 /media/comics/GrooTheWanderer/

Compile

Install imagemagick dev packages:

apt-get install libmagickcore-dev libmagickwand-dev

Compile latest MuPDF:

git clone git://git.ghostscript.com/mupdf.git && cd mupdf
git submodule update --init --recursive
curl -L https://gist.githubusercontent.com/gen2brain/7869ac4c6db5933f670f/raw/1619394dc957ae10bcd73c713760993466b4bfea/mupdf-openssl-curl.patch | patch -p1
sed -e "1iHAVE_X11 = no" -e "1iWANT_OPENSSL = no" -e "1iWANT_CURL = no" -i Makerules
HAVE_X11=no HAVE_GLFW=no HAVE_GLUT=no WANT_OPENSSL=no WANT_CURL=no HAVE_MUJS=yes HAVE_JSCORE=no HAVE_V8=no make && make install

Compile unarr library:

git clone https://github.com/zeniko/unarr && cd unarr
mkdir lzma920 && cd lzma920 && curl -L http://www.7-zip.org/a/lzma920.tar.bz2 | tar -xjvp && cd ..
curl -L http://zlib.net/zlib-1.2.8.tar.gz | tar -xzvp
curl -L http://www.bzip.org/1.0.6/bzip2-1.0.6.tar.gz | tar -xzvp
curl -L https://gist.githubusercontent.com/gen2brain/89fe506863be3fb139e8/raw/8783a7d81e22ad84944d146c5e33beab6dffc641/unarr-makefile.patch | patch -p1
CFLAGS="-DHAVE_7Z -DHAVE_ZLIB -DHAVE_BZIP2 -I./lzma920/C -I./zlib-1.2.8 -I./bzip2-1.0.6" make
cp build/debug/libunarr.a /usr/lib64/ && cp unarr.h /usr/include

Install dependencies:

go get github.com/cheggaaa/pb
go get github.com/disintegration/imaging
go get github.com/gen2brain/go-fitz
go get github.com/gen2brain/go-unarr
go get github.com/gographics/imagick/imagick
go get github.com/hotei/bmp
go get github.com/skarademir/naturalsort
go get golang.org/x/image/tiff
go get golang.org/x/image/webp
go get gopkg.in/alecthomas/kingpin.v2

For command line app:

go get github.com/gen2brain/cbconvert
go build -o $GOPATH/bin/cbconvert github.com/gen2brain/cbconvert/cmd

For GUI app:

go get gopkg.in/qml.v1
go get github.com/gen2brain/cbconvert
go build -o $GOPATH/bin/cbconvert github.com/gen2brain/cbconvert/gui