Installing OCRmyPDF¶
The easiest way to install OCRmyPDF is to follow the steps for your operating system/platform, although sometimes this version may be out of date.
If you want to use the latest version of OCRmyPDF, your best bet is to install the most recent version your platform provides, and then upgrade that version by installing the Python binary wheels.
Platform-specific steps
Installing on Linux¶
Debian and Ubuntu 16.10 or newer¶
OCRmyPDF versions in Debian & Ubuntu |
Users of Debian 9 (“stretch”) or later or Ubuntu 16.10 or later may simply
apt-get install ocrmypdf
As indicated in the table above, Debian and Ubuntu releases may lag behind the latest version. If the version available for your platform is out of date, you could opt to install the latest version from source. See Installing HEAD revision from sources.
For full details on version availability for your platform, check the Debian Package Tracker or Ubuntu launchpad.net.
Note
OCRmyPDF for Debian and Ubuntu currently omit the JBIG2 encoder. OCRmyPDF works fine without it but will produce larger output files. If you build jbig2enc from source, ocrmypdf 7.0.0 and later will automatically detect it (specifically the jbig2
binary) on the PATH
. To add JBIG2 encoding, see Installing the JBIG2 encoder.
Fedora 29 or newer¶
OCRmyPDF version |
Users of Fedora 29 later may simply
dnf install ocrmypdf
For full details on version availability, check the Fedora Package Tracker.
If the version available for your platform is out of date, you could opt to install the latest version from source. See Installing HEAD revision from sources.
Note
OCRmyPDF for Fedora currently omits the JBIG2 encoder due to patent issues.
OCRmyPDF works fine without it but will produce larger output files. If you
build jbig2enc from source, ocrmypdf 7.0.0 and later will automatically
detect it on the PATH
. To add JBIG2 encoding, see Installing the JBIG2
encoder.
Installing the latest version on Ubuntu 18.04 LTS¶
Ubuntu 18.04 includes ocrmypdf 6.1.2. To install a more recent version, first install the system version to get most of the dependencies:
sudo apt-get update
sudo apt-get install \
ocrmypdf \
python3-pip
There are a few dependency changes between ocrmypdf 6.1.2 and 7.x. Let’s get these, too.
sudo apt-get install \
libexempi3 \
pngquant
Then install the most recent ocrmypdf for the local user and set the user’s PATH
to check for the user’s Python packages.
export PATH=$HOME/.local/bin:$PATH
pip3 install --user ocrmypdf
To add JBIG2 encoding, see Installing the JBIG2 encoder.
Ubuntu 16.04 LTS¶
No package is available for Ubuntu 16.04. OCRmyPDF 8.0 and newer require Python 3.6. Ubuntu 16.04 ships Python 3.5, but you can install Python 3.6 on it. Or, you can skip Python 3.6 and install OCRmyPDF 7.x or older - for that procedure, please see the installation documentation for the version of OCRmyPDF you plan to use.
Install system packages for OCRmyPDF
sudo apt-get update
sudo apt-get install -y software-properties-common python-software-properties
sudo add-apt-repository -y \
ppa:jonathonf/python-3.6 \
ppa:alex-p/tesseract-ocr
sudo apt-get update
sudo apt-get install -y \
ghostscript \
libexempi3 \
libffi6 \
pngquant \
python3.6 \
qpdf \
tesseract-ocr \
unpaper
This will install a Python 3.6 binary at /usr/bin/python3.6
alongside the
system’s Python 3.5. Do not remove the system Python. This will also install
Tesseract 4.0 from a PPA, since the version available in Ubuntu 16.04 is too old
for OCRmyPDF.
Now install pip for Python 3.6. This will install the Python 3.6 version of
pip
at /usr/local/bin/pip
.
curl https://bootstrap.pypa.io/get-pip.py | sudo python3.6
Install OCRmyPDF
OCRmyPDF requires the locale to be set for UTF-8. On some minimal Ubuntu installations systems, it may be necessary to set the locale.
# Optional: Only need to set these if they are not already set
export LC_ALL=C.UTF-8
export LANG=C.UTF-8
Now install OCRmyPDF for the current user, and ensure that the PATH
environment variable contains $HOME/.local/bin
.
export PATH=$HOME/.local/bin:$PATH
pip3 install --user ocrmypdf
To add JBIG2 encoding, see Installing the JBIG2 encoder.
Ubuntu 14.04 LTS¶
Installing on Ubuntu 14.04 LTS (trusty) is more difficult than some other options, because of its age. Several backports are required. For explanations of some steps of this procedure, see the similar steps for Ubuntu 16.04.
Install system dependencies:
sudo apt-get update
sudo apt-get install \
software-properties-common python-software-properties \
zlib1g-dev \
libexempi3 \
libjpeg-dev \
libffi-dev \
pngquant \
qpdf
We will need backports of Ghostscript 9.16, libav-11 (for unpaper 6.1), Tesseract 4.00 (alpha), and Python 3.6. This will replace Ghostscript and Tesseract 3.x on your system. Python 3.6 will be installed alongside the system Python 3.4.
If you prefer to not modify your system in this matter, consider using a Docker container.
sudo add-apt-repository ppa:vshn/ghostscript -y
sudo add-apt-repository ppa:heyarje/libav-11 -y
sudo add-apt-repository ppa:alex-p/tesseract-ocr -y
sudo add-apt-repository ppa:jonathonf/python-3.6 -y
sudo apt-get update
sudo apt-get install \
python3.6-dev \
ghostscript \
tesseract-ocr \
tesseract-ocr-eng \
libavformat56 libavcodec56 libavutil54 \
wget
Now we need to install pip
and let it install ocrmypdf:
curl https://bootstrap.pypa.io/ez_setup.py -o - | python3.6 && python3.6 -m easy_install pip
pip3.6 install ocrmypdf
These installation instructions omit the optional dependency unpaper
, which is only available at version 0.4.2 in Ubuntu 14.04. The author could not find a backport of unpaper
, and created a .deb package to do the job of installing unpaper 6.1 (for x86 64-bit only):
wget -q 'https://www.dropbox.com/s/vaq0kbwi6e6au80/unpaper_6.1-1.deb?raw=1' -O unpaper_6.1-1.deb
sudo dpkg -i unpaper_6.1-1.deb
To add JBIG2 encoding, see Installing the JBIG2 encoder.
ArchLinux (AUR)¶
There is an ArchLinux User Repository package for ocrmypdf. You can use the following command.
yaourt -S ocrmypdf
If you have any difficulties with installation, check the repository package page.
Other Linux packages¶
See the Repology page.
In general, first install the OCRmyPDF package for your system, then optionally use the procedure Installing with Python pip to install a more recent version.
Installing on macOS¶
Homebrew¶
OCRmyPDF is now a standard Homebrew formula. To install on macOS:
brew install ocrmypdf
This will include only the English language pack. If you need other languages you can optionally install them all:
brew install tesseract-lang # Optional: Install all language packs
Note
Users who previously installed OCRmyPDF on macOS using pip install ocrmypdf
should remove the pip version (pip3 uninstall ocrmypdf
) before switching to the Homebrew version.
Note
Users who previously installed OCRmyPDF from the private tap should switch to the mainline version (brew untap jbarlow83/ocrmypdf
) and install from there.
Manual installation on macOS¶
These instructions probably work on all macOS supported by Homebrew.
If it’s not already present, install Homebrew.
Update Homebrew:
brew update
Install or upgrade the required Homebrew packages, if any are missing. To do this, download the Brewfile
that lists all of the dependencies to the current directory, and run brew bundle
to process them (installing or upgrading as needed). Brewfile
is a plain text file.
wget https://github.com/jbarlow83/OCRmyPDF/raw/master/.travis/Brewfile
brew bundle
This will include the English, French, German and Spanish language packs. If you need other languages you can optionally install them all:
brew install tesseract --with-all-languages # Option 2: for all language packs
Update the homebrew pip:
pip3 install --upgrade pip
You can then install OCRmyPDF from PyPI, for the current user:
pip3 install --user ocrmypdf
or system-wide:
pip3 install ocrmypdf
The command line program should now be available:
ocrmypdf --help
Installing the Docker image¶
For some users, installing the Docker image will be easier than installing all of OCRmyPDF’s dependencies. For Windows, it is the only option.
See OCRmyPDF Docker Image for more information.
Installing on Windows¶
Direct installation on Windows is not possible. Install the Docker container as described above. Ensure that your command prompt can run the docker “hello world” container.
It would probably not be too difficult to port on Windows. The main reason this has been avoided is the difficulty of packaging and installing the various non-Python dependencies: Tesseract, QPDF, Ghostscript, Leptonica. Pull requests to add or improve Windows support would be quite welcome.
Installing with Python pip¶
OCRmyPDF is delivered by PyPI because it is a convenient way to install the latest version. However, PyPI and pip
cannot address the fact that ocrmypdf
depends on certain non-Python system libraries and programs being instsalled.
For best results, first install your platform’s version of ocrmypdf
, using the instructions elsewhere in this document. Then you can use pip
to get the latest version if your platform version is out of date. Chances are that this will satisfy most dependencies.
Use ocrmypdf --version
to confirm what version was installed.
Then you can install the latest OCRmyPDF from the Python wheels. First try:
pip3 install --user ocrmypdf
You should then be able to run ocrmypdf --version
and see that the latest version was located.
Since pip3 install --user
does not work correctly on some platforms, notably Ubuntu 16.04 and older, and the Homebrew version of Python, instead use this for a system wide installation:
pip3 install ocrmypdf
Requirements for pip and HEAD install¶
OCRmyPDF currently requires these external programs and libraries to be installed, and must be satisfied using the operating system package manager. pip
cannot provide them.
- Python 3.6 or newer
- Ghostscript 9.15 or newer
- qpdf 8.1.0 or newer
- Tesseract 4.0.0-alpha or newer
As of ocrmypdf 7.2.1, the following versions are recommended:
- Python 3.7
- Ghostscript 9.23 or newer
- qpdf 8.2.1
- Tesseract 4.0.0 or newer
- jbig2enc 0.29 or newer
- pngquant 2.5 or newer
- unpaper 6.1
jbig2enc, pngquant, and unpaper are optional. If missing certain features are disabled. OCRmyPDF will discover them as soon as they are available.
jbig2enc, if present, will be used to optimize the encoding of monochrome images. This can significantly reduce the file size of the output file. It is not required. jbig2enc is not generally available for Ubuntu or Debian due to lingering concerns about patent issues, but can easily be built from source. To add JBIG2 encoding, see Installing the JBIG2 encoder.
pngquant, if present, is optionally used to optimize the encoding of PNG-style images in PDFs (actually, any that are that losslessly encoded) by lossily quantizing to a smaller color palette. It is only activated then the --optimize
argument is 2
or 3
.
unpaper, if present, enables the --clean
and --clean-final
command line options.
These are in addition to the Python packaging dependencies, meaning that unfortunately, the pip install
command cannot satisfy all of them.
Installing HEAD revision from sources¶
If you have git
and Python 3.6 or newer installed, you can install from source. When the pip
installer runs, it will alert you if dependencies are missing.
If you prefer to build every from source, you will need to build pikepdf from source. First ensure you can build and install pikepdf.
To install the HEAD revision from sources in the current Python 3 environment:
pip3 install git+https://github.com/jbarlow83/OCRmyPDF.git
Or, to install in development mode, allowing customization of OCRmyPDF, use the -e
flag:
pip3 install -e git+https://github.com/jbarlow83/OCRmyPDF.git
You may find it easiest to install in a virtual environment, rather than system-wide:
git clone -b master https://github.com/jbarlow83/OCRmyPDF.git
python3 -m venv
source venv/bin/activate
cd OCRmyPDF
pip3 install .
However, ocrmypdf
will only be accessible on the system PATH
when you activate the virtual environment.
To run the program:
ocrmypdf --help
If not yet installed, the script will notify you about dependencies that need to be installed. The script requires specific versions of the dependencies. Older version than the ones mentioned in the release notes are likely not to be compatible to OCRmyPDF.
For development¶
To install all of the development and test requirements:
git clone -b master https://github.com/jbarlow83/OCRmyPDF.git
python3 -m venv
source venv/bin/activate
cd OCRmyPDF
pip install -e .
pip install -r requirements/dev.txt -r requirements/test.txt
To add JBIG2 encoding, see Installing the JBIG2 encoder.