[FFmpeg-devel] [PATCH] mp4 and ipod metadata

Michael Niedermayer michaelni
Wed Jun 11 15:12:47 CEST 2008

On Wed, Jun 11, 2008 at 01:05:12PM +0100, M?ns Rullg?rd wrote:
> Baptiste Coudurier wrote:
> > Michael Niedermayer wrote:
> >> On Mon, Jun 09, 2008 at 02:30:34PM -0700, Baptiste Coudurier wrote:
> >>> Hi all,
> >>>
> >>> Atm current mp4 muxer writes non standard and itunes specific metadata.
> >>> I intend to change this behaviour and to writes these metadata only for
> >>> -f ipod output format.
> >>
> >> Iam against this change unless there is an actual application for which
> >> the tags cause problems (which really shouldnt be, applications should
> >> ignore tags unknown to them, especially if they are within "user data").
> >>
> >
> > First, correct and standards tags exists for 3gp, so itunes tags should
> > not be written for 3gp, nor for mov since equivalent exist.
> >
> > Then, as a general attitude, Im against writing non standard features in
> > perfectly defined standards.
> >
> > If the user wants them he can use -f ipod format, we are not removing
> > support for metadata. We created a specific format for this, please
> > let's use it and stop spreading that mp4 is ipod/itunes format.
> I'm with Baptiste on this one.

But you arent mov/mp4 maintainer, while i am and i object to the proposed
change unless the existing functionality is provided by some other means.

[existing functionality] being having the ipod tags (which do no harm) in
other mp4 variants so they can be played on more players.

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

When the tyrant has disposed of foreign enemies by conquest or treaty, and
there is nothing more to fear from them, then he is always stirring up
some war or other, in order that the people may require a leader. -- Plato
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