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maikmerten@svn.wikimedia.org wrote:

Uh, hello, first commit here.

Welcome!

This is a rather big patch to make jheora more spec-compliant

• basically complete rewrite how quantization matrices are computed (interpolation, scaling etc.)
• handle 4MV for partially coded macro blocks according to spec. This enables playback of Thusnelda-encoded streams.

And may I say, woohoo!

For those not familiar with the background on this, Thusnelda is an ongoing project to reimplement the Theora video encoder to create higher-quality files while remaining within the original format specification -- that is, videos encoded with the new encoder will look much better, *and* play just fine on existing compliant players.

A recent update with some samples: http://web.mit.edu/xiphmont/Public/theora/demo5.html

Unfortunately there are some bad playback implementations in the wild still, which don't play back files done with the new encoder. The existing jheora library used by the Cortado Java player, as well as... VLC! Yeouch. :)

(The Xiph Quicktime components do play back the clips just fine, though.)

- -- brion