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

Michael Niedermayer michaelni
Wed Jun 11 08:37:30 CEST 2008

On Tue, Jun 10, 2008 at 10:54:48PM -0700, 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.

What i want (and i belive users as well) is a "universal" format which
can be used everywhere. That doesnt mean ipod tags should be in -f mp4 or
-f mov but that there is a -f foobar that contains all tags of all variants.
I prefer if i dont need to have each video 3 times so it can be played on
3 different players.

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

I hate to see young programmers poisoned by the kind of thinking
Ulrich Drepper puts forward since it is simply too narrow -- Roman Shaposhnik
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