[MPlayer-users] Re: lavc-Options for *BEST* quality?
Jason Lunz
lunz at falooley.org
Tue Feb 4 05:29:13 CET 2003
dalias at aerifal.cx said:
> course vorbis at -q0 sounds just as good and uses about 65kbit/s. This
> is a savings of about 22 megs for a normal length movie, but when you
> consider the extra 12 megs or so you waste on ogg page headers, it's
> not really a big difference.
I just measured a few 700M .ogm files, and the total overhead was always
about 1% (7M). I dug out some old avis for comparison, and I didn't see
that much difference, maybe an extra 3 megs or so. Maybe you were using
an old version of ogmmerge?
file bitrate total video audio overhead
-----------------------------------------------------------------------------
rushmore.avi 920/128 731926524 639513648 88880904 3531972 (3.4M, 0.48%)
aod.avi 852/128 709123722 613365454 92098825 3659443 (3.5M, 0.52%)
traffic.avi 514/128 715686394 568683344 141385995 5617055 (5.4M, 0.79%)
singles.ogm 890/85 732770345 662630351 63100765 7039229 (6.7M, 0.96%)
zoolander.ogm 1006/80 733039525 672552326 53344661 7142538 (6.8M, 0.97%)
Based on that, the improved vorbis bitrate far outweighs the ogg
overhead.
As far as seeking goes, that's an mplayer issue with non-indexed files,
not anything specific to ogg.
Jason
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