WebP Encoding

This wiki/Encoding has 3 encoders:

• a Cython based encoder using the ​Advanced Encoding API (only available in version 0.13 onwards) which is faster
• a python-webm fallback
• fallback to wiki/Encodings/Pillow

And 2 decoders:

• a python-webm
• fallback to wiki/Encodings/Pillow

Be aware that although webp offers efficient compression, it can be quite slow at times, especially in "lossless" mode.

Versions

As of xpra version 0.13, we no longer support older version of libwebp, you must have version 0.3 or later.

Updated python-webm

We carry a modified version of python-webm, with the following changes:

• ​support for lossless modes
• memory leak fixed
• removed buggy code in YUV to RGB conversion files - which we don't need since we have our own colourspace conversion modules.

Source

You can find source snapshots here:
​http://xpra.org/src/

The source is kept in xpra's source tree under src/xpra/codecs/webm and the tests are under src/tests/webm

Links and Tickets

• ​WebP upstream: A new image format for the Web
• ​python-webm upstream
• #491: webp is leaking memory (same bug in Python Pillow: ​Pillow issue 586)
• 419#comment:4: better/faster lossless encoding selection: webp lossless can be extremely slow!