116381 - Support non-experimental (but unregistered) MNG and JNG MIME types (video/mng & image/jng) in addition to experimental types (video/x-mng & image/x-jng)

Status: RESOLVED WONTFIX

(Core :: Graphics: ImageLib, defect)

Description

[Atsushi Matsuda]

The regular MNG's MIME-type is 'video/x-mng', the regular JNG's MIME-type 
is 'image/x-jng'. However, 'video/mng' and 'image/jng' also exist. But it seems 
that Mozilla (0.9.7+) is not supporting these.

Comment 1

[Christopher Hoess (gone)]

Neither of these MIME-types is registered with IANA.  Probably INVALID.

Comment 2

[Atsushi Matsuda]

#1 ->
I see.
I give up about this affair temporarily.

Comment 3

[Jeremy M. Dolan]

Would it be that bad an idea to support them now, so when they're not
experimental old Mozilla's (0.9.8, 1.0) still work? That's what I hate about the
mime type system.

I hate to skip around IANA, but It's a pretty sure bet eaither these will
eventually be v/mng and i/jng, or nothing will be for a long time.

Comment 4

[Darin Fisher]

-> pavlov

Comment 5

[Stuart Parmenter]

->tor

Comment 6

[Christian :Biesinger (don't email me, ping me on IRC)]

Attachment: patch

this patch should fix it... but do we want it? these types are still not
officially registered (according to
ftp://ftp.isi.edu/in-notes/iana/assignments/media-types/video/)

Comment 7

[Greg Roelofs]

> but do we want it? these types are still not officially registered

The traditional answer has been "no", and it's likely to be a while before they
are officially registered, insofar as IANA likes officially blessed specs
(IIRC), and neither the W3C nor the IETF nor ISO/IEC have any plans to move
forward on these (AFAIK).  ISO/IEC have been sitting on the PNG spec for a
couple of years now (or three, even?).

I realize MNG and JNG are considerably more popular in Japan, and I'd guess this
request may be due in part to the fact that some sites have jumped the gun and
started using the non-"x" types.  But such sites are officially broken, and I
imagine there will be plenty of time to upgrade Mozilla if/when it appears that
the non-"x" types are about to be registered.

One thing that would be useful, however, is a way to manually add such things
(via prefs -> applications) and actually be able to invoke the internal
decoders.  That has never worked in NN 4.x, I'm pretty sure, and I'm not sure it
works in Mozilla, either.

Greg

P.S.  Cc'ing Glenn and Chris for possible standardization insights.

Comment 8

[Greg K.]

Revising Summary.

Comment 9

[Greg K.]

(I should add that, though I revised the summary, I don't agree this should be
done until the MIME types are officially registered with the IANA.)

Comment 10

[Peter Weilbacher]

Just echoing the WONTFIXed from bug 18574.