PAL coding and decoding with Pyctools.
This uses Pyctools to simulate a PAL coder and two decoders. PAL is the colour system used for analogue television in (most of) western Europe and many other parts of the world. It is still of some interest because of its use in TV archives. (And it presents some interesting technical problems.)
This project also demonstrates how to extend Pyctools. It can be copied (and renamed!) to use as a base for your own extensions.
- Pyctools and its requirements.
Use of Pyctools-PAL requires easy access to the source files, so installation with pip is not really appropriate.
You should clone the GitHub repository, or download and extract a zip or tar.gz archive from the GitHub releases page, and then use setup.py to install the PAL components:
git clone https://github.com/jim-easterbrook/pyctools-pal.git cd pyctools-pal python setup.py build sudo python setup.py install
The src/scripts directory contains a PAL coder, normal PAL decoder and 2D Transform PAL Decoder that can be loaded into the Pyctools graph editor.
Start with the coder so you can generate a PAL file to use with the decoders.
Before running either script you need to configure the file reader and/or writer components' path values.
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.