[MPlayer-users] Re: lavc-Options for *BEST* quality?

[Jason Lunz]

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