Re: Sidecar :(

[Jamie Wilkinson <jaq spacepants org>]

This one time, at band camp, Bengt Thuree wrote:
>On Thu, 2006-05-25 at 17:35 +0400, Alexandre Prokoudine wrote:
>> On 5/25/06, Bengt Thuree wrote:
>> 
>> > The thoughts we had was for raw files which do not have embedded tags,
>> > we should use a sidecar (same filename as photo, but ending
>> > with .jpg.xmp), if it exists.
>> >
>> > But since the raw file also have embedded data, I do not know which one
>> > to prioritise...
>> > Any suggestions most welcome...
>> 
>> I think it's pretty easy. Any additional data (which is exactly what
>> .jpg.xmp is) should be considered as newer and therefore have higher
>> priority.
>
>Would be nice if that were true...
>For instance a sidecar can follow a file, and then along the way the
>user starts to embed his tags... but the sidecar is still there...
>
>On the issue of priority...
>
>Which priority should we have for the various "Description" fields that
>exists.
>
>a) Adobe User Comment (F-Spot stores comment here)
>b) PhotoShop - Headline : PhotoShop - Caption
>c) Sidecar - title : Sidecar - description
>d) EXIF description (F-Spot clears this one on input)
>
>I prioritise them in the above order, and when one value is found, I use
>it and stops to look for more. I do not look for EXIF description at
>all.

Why don't you ask the user?  Quod Libet is a jukebox (written in Python)
that has one of the best metadata editing systems I've ever seen.

If you get two different values for the same key in the metadata, default to
one but let the user pick the canonical source from a dialog.