CBconvert

Introduction

CBconvert is a Comic Book converter.

It allows you to convert individual comics 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 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

Using

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
    --quality=75     JPEG image quality
    --filter=2       0=NearestNeighbor, 1=Box, 2=Linear, 3=MitchellNetravali, 4=CatmullRom, 6=Gaussian, 7=Lanczos
    --png            Encode images to PNG instead of JPEG
    --bmp            Encode images to 4-Bit BMP (16 colors) instead of JPEG
    --gif            Encode images to GIF instead of JPEG
    --tiff           Encode images to TIFF instead of JPEG
    --rgb            Convert images that have RGB colorspace (use --no-rgb if you only want to convert grayscale 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

  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

Install go package:

go get github.com/gen2brain/cbconvert
go install github.com/gen2brain/cbconvert

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