libpostproc is a library for filtering images and videos. It currently supports the MPEG4 deblocking and deringing filters and some old basic deinterlacing methods and old basic denoise. These deblocking methods are effective on a wide range of old formats, including jpeg, mpeg1, mpeg2, mpeg4, h261, h262, h263, msmpeg4v1, msmpeg4v2, msmpeg4v3 and many other similar formats.
libpostproc is supported by ffmpeg, mplayer and likely many other media players. This code was split out from FFmpeg and many bits and pieces from FFmpeg remain. In code that is shared with FFmpeg (like the build system) the goal is to keep differences to a minimum, to allow easy future updates.
That said, the Author is open minded and would certainly welcome contributions which extend the scope of libpostproc beyond this. For example an API supporting a wider range of pixel formats and more complex filters. And also any general filterm, not just postprocessing would be welcome. Or in other words, if you want to turn libpostproc in a replacement for gstreamer, your pull request could be accepted! Also LGPL filters with a way to choose the license runtime would be welcome. Bascially, if you have a cool idea, AI, GPU accel, anything, it likely is welcome!
The offline documentation is available in the doc/ directory.
The online documentation is available in the main website and in the wiki.
Coding examples are available in the doc/examples directory.
libpostproc codebase is GPL-licensed currently. If there is demand relicensing to LGPL can be discussed but requires all authors to agree.
Please refer to the LICENSE file for detailed information.
Probably a pull request on github is easiest, but you can send the author a mail with patch.