[FFmpeg-devel] [PATCH] Allow setting mode MONO in libmp3lame if the library is greater than 3.97

[Michael Niedermayer]

On Tue, Aug 17, 2010 at 11:39:48AM -0700, Thierry Foucu wrote:
> 2010/8/16 M?ns Rullg?rd <mans at mansr.com>
> 
> > Stefano Sabatini <stefano.sabatini-lala at poste.it> writes:
> >
> > > On date Monday 2010-08-16 17:18:51 +0200, Michael Niedermayer encoded:
> > >> On Fri, Aug 13, 2010 at 02:29:11PM -0700, Thierry Foucu wrote:
> > >> > On Fri, Aug 13, 2010 at 11:40 AM, Reimar D?ffinger <
> > Reimar.Doeffinger at gmx.de
> > >> > > wrote:
> > >> >
> > >> > > On Fri, Aug 13, 2010 at 10:00:39AM -0700, Thierry Foucu wrote:
> > >> > > > +    get_lame_version_numerical(&lame_version);
> > >> > > > +    if (lame_version.major <= 3 && lame_version.minor < 97) {
> > >> > >
> > >> > > I think that isn't quite right, it would do the wrong thing
> > >> > > for a (probably non-existent and not supported by us)
> > >> > > 2.99 version.
> > >> > >
> > >> >
> > >> > True.. Will send a new patch for this (after the follow up
> > >> > question will be answer)
> > >> >
> > >> >
> > >> > > Also do we really need to support the buggy older versions?
> > >> > >
> > >> >
> > >> >
> > >> > Up to you. I can remove the test and be done with it.
> > >> > What do the others dev think about it?
> > >>
> > >> i am in favor of such checks if and only if we have a volunteer to
> > maintain
> > >> them
> > >>
> > >> do we?
> > >
> > > I'm for adding a version check in configure, which avoids the use of
> > > an older version, as we do for other libraries (e.g. libx264,
> > > librtmp).
> >
> > How likely are old lame versions in the wild?  IOW, how old is the
> > latest bad version, and have major distros updated (to the extent they
> > ship lame at all)?
> >
> >
> Here is a patch which sets the mode based on stereo and it does not check
> the lame version.

ok, but this needs a configure check to make sure lame is not too old

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

The worst form of inequality is to try to make unequal things equal.
-- Aristotle
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