Linked by Eugenia Loli on Wed 12th Dec 2007 05:56 UTC
Benchmarks A lot was said lately about the Vorbis/Theora vs h.264/AAC situation on the draft of the HTML5. As some of you know, video is my main hobby these days (I care not about operating systems anymore), so I have gain some experience on the field lately, and at the same time this has made me more demanding about video quality. Read on for a head to head test: OGG Theora/Vorbis vs MP4 h.264/AAC. Yup, with videos. And pictures.
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Theora not necessarily worse...
by FellowConspirator on Thu 13th Dec 2007 13:22 UTC
FellowConspirator
Member since:
2007-12-13

While I generally like h.264 myself (generally use it in a Quicktime container), the samples you post of frames from the encoded videos show that the big difference is sharpness due to local decreases in contrast. Presumably this would be corrected by using a different DCT matrix (an option to FFMPEG).

In this case, I'd be inclined to conclude that you'd probably get encodings that were functionally identical if you further adjusted the Theora encoding parameters (which may take considerable trial and error -- but that was true of h264 encoding at one time too).

Using Theora as a baseline probably makes very good sense. However, Quicktime is also open and free from patents (the container format, not the popular codecs used with it), and it might make sense to use Theora in a quicktime container to leverage the additional features of that which including hinting, references, chapters, captioning, etc.

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