To answer your "question" (more than a bug report), this is just a matter of changing the quality setting when rendering. I also filed http://bugzilla.gnome.org/show_bug.cgi?id=594564 about this, but I'm not sure they will implement it.
In any case, please report bugs on bugzilla.gnome.org, *not* on launchpad.
Also, you may be interested in trying Theora 1.1 (aka "thusnelda"), currently in release candidate status, to have better encoding quality for the same settings.
To answer your "question" (more than a bug report), this is just a matter of changing the quality setting when rendering. I also filed http:// bugzilla. gnome.org/ show_bug. cgi?id= 594564 about this, but I'm not sure they will implement it.
In any case, please report bugs on bugzilla.gnome.org, *not* on launchpad.
Also, you may be interested in trying Theora 1.1 (aka "thusnelda"), currently in release candidate status, to have better encoding quality for the same settings.