[vorbis] AVI stream w/ AC3 5.1ch

Christopher Granade cgranade at greens.org
Fri Jul 25 16:23:41 PDT 2003



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moerk wrote:
| what's wrong with this, it's around 17% of the bandwith for the audio
| signal. i would it's a maximum of 256 kbps for a 5.1 signal, which is
| not too much, you should be able to hear the ac3 compression. i doubt
| you can get much lower with vorbis without getting much worse audio
| quality (you are lossly compressing a already lossly compressed signal).

Well, simply that it could be better... I think my figures there were
off, as I was quoting from memory. I had another video, where AC3 took
82,131KB, the video took 138,261KB and the OGG took 58,771KB when
transcoded 5.1ch->5.1ch with the OggMachine tool reccommended me by this
list. That, and with the OGG format's normalization data, it sounds
better than the original AC3.
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