[Bug 747315] EXIF tags: should write strings as UTF-8 by default, not Latin1

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=747315

--- Comment #4 from Paulo Neves <ptsneves at gmail.com> ---
@Sebastian:

Indeed the GST_TAGs are assumed to be UTF-8, but are they validated when
written in all the code? If the assumption is strong then i can remove the
g_utf8_validate conditional in a new patch.

About the latin1. The conversion previously done was surely not founded in
anything stated in the standard. As I said, only ANSI ASCII was foreseen. It is
indeed ironic that a Japanese industry standard depends on ANSI ASCII. One of
the possible explanations I read was that the TIFF standard is the base of the
JIF standard which in turn is an ANSI standard, ergo ANSI ASCII.

I thought that the Greek characters would be inherently multi byte. Can you
confirm me they are not? 

The text is from an Odysseus Elytis poem i think. Sorry but it has nothing to
do with my understanding of Greek == 0. I found it in a page which has lots of
poems in various languages that use Unicode:
http://www.columbia.edu/~fdc/utf8/. I think i read in the gstreamer conference
page that that lots of developers of gstreamer are living in Greece.

@Tim-Philipp I hope this patch can solve a problem then. If you have more
problems regarding tags that need to be solved let me know. I worked on this
bug because I skimmed your bugzilla profile looking for a place to help.

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