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.

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!