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H.264 vs. Theora vs. Dirac comparisonH.264 vs. Theora vs. Dirac comparisonPosted Jan 28, 2010 22:31 UTC (Thu) by DonDiego (subscriber, #24141)Parent article: Blizzard: HTML5 video and H.264 - what history tells us and why we're standing with the web
Here is a professionally done codec comparison between H.264 (x264), Theora (libtheora) and Dirac (libschroedinger):
http://codecism.blogspot.com/2010/01/theora-vs-x264-vs-sc...
Let me quote the result:
Conclusion
PSNR and SSIM don't perfectly correlate to perceived quality. But they're close, and if anything the conclusion that Theora needs at least twice the bitrate to match H.264 in terms of objective quality measurements understates the effect of x264's psychovisual optimizations.
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