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

Michael Niedermayer michaelni
Wed Jun 11 21:41:13 CEST 2008

On Wed, Jun 11, 2008 at 11:44:12AM -0700, Baptiste Coudurier wrote:
> Hi,
> Michael Niedermayer wrote:
> > 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.
> > 
> Well, that's a compromise we have to find.
> I see some features needed also, like to be able to set ftyp brand.
> Besides, I noticed that for .mov current muxer write double sets of
> metadata, and I'd like only one set being the standard .mov way.

> So I'd like not to write itunes specific metadata for .mov. Are you ok
> with that ?



Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Concerning the gods, I have no means of knowing whether they exist or not
or of what sort they may be, because of the obscurity of the subject, and
the brevity of human life -- Protagoras
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: Digital signature
URL: <http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/attachments/20080611/de6186c2/attachment.pgp>

More information about the ffmpeg-devel mailing list