reads rar, zip, 7z, gz, bz2, cbr, cbz, cb7, cbt, pdf, epub, xps and plain directory
always saves processed comic in cbz (zip) format
images can be converted to JPEG, PNG or 4-Bit BMP (16 colors) format
choose resize algorithm (NearestNeighbor, Bilinear, Bicubic, MitchellNetravali, Lanczos2/3)
export covers from comics
create thumbnails from covers by freedesktop specification

Download

Using

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

Comic Book convert tool.

Flags:
      --help             Show context-sensitive help (also try --help-long and --help-man).
      --version          Show application version.
  -p, --png              encode images to PNG instead of JPEG
  -b, --bmp              encode images to 4-Bit BMP instead of JPEG
  -w, --width=0          image width
  -h, --height=0         image height
  -q, --quality=75       JPEG image quality
  -n, --norgb            do not convert images with RGB colorspace
  -i, --interpolation=1  0=NearestNeighbor, 1=Bilinear, 2=Bicubic, 3=MitchellNetravali, 4=Lanczos2, 5=Lanczos3
  -s, --suffix=SUFFIX    add suffix to file basename
  -c, --cover            extract cover
  -t, --thumbnail        extract cover thumbnail (freedesktop spec.)
  -o, --outdir="."       output directory
  -m, --size=0           process only files larger then size (in MB)
  -r, --recursive        process subdirectories recursively
  -Q, --quiet            hide console output

Args:
  <args>  filename or directory

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 archive to 4bit BMP image and save result in ~/comics directory:

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

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

Generate thumbnails by freedesktop specification in ~/.thumbnails/normal directory, Lanczos3 algorithm is used for resizing:

cbconvert --interpolation=5 --outdir ~/.thumbnails/normal --thumbnail /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
HAVE_X11=no HAVE_GLFW=no HAVE_GLUT=no WANT_CURL=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/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/nfnt/resize
go get github.com/skarademir/naturalsort
go get gopkg.in/alecthomas/kingpin.v2

Install go package:

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