[FFmpeg-cvslog] r12241 - trunk/libavformat/mov.c

[Baptiste Coudurier]

Reimar D?ffinger wrote:
> On Wed, Feb 27, 2008 at 02:35:11PM +0100, Baptiste Coudurier wrote:
>> Reimar D?ffinger wrote:
>>> On Wed, Feb 27, 2008 at 01:35:29PM +0100, Baptiste Coudurier wrote:
>>>> The problem is that you don't see any use of this feature, and fail to
>>>> understand why it is useful, but you should first read specs of 'alis'
>>>> and Alias Record functionnality.
>>> Hm. I only read parts of the Quicktime format specification and could
>>> find very little about it, but I noticed that it says:
>>> "A value of 'alis' indicates a file system alias record." (Chapter 2,
>>> page 91, "Data Reference Atom",
>>> http://developer.apple.com/documentation/QuickTime/QTFF/qtff.pdf).
>>> In which case your implementation is just plain broken, since a value of
>>> "http://test.com/test" then would have to open the _file_ named thus,
>>> whereas your implementation would try to open a http connection.
>>> And the generated filename indeed can start with http:// since the
>>> "volume" part at least in the current implementation can contain any
>>> string.
>> Please read code and specs another time, and search deeper.
> 
> Look, if you want to tell me that I am an idiot and the code the code replaces
> all ':' by '/' and thus url_fopen will only open local files, then just
> say so (and preferably add a comment to the corresponding url_fopen).

Please, no, Im not meaning that at all, Im just sick of eternal
discussions starting like this one did: "this must be a joke, etc..."

Code will do that nonetheless.

> Most of the problems are then not actually there, unless and until
> someone comes along and thinks: "hey, why not just implement the url
> reference type as well, it's almost a one-liner".

Well, Alias Record (type 'alis') is not meant to contain urls, and is
not handled here, we will see in the future, if handling those is needed
and wanted.

> Though since I have not found anything so far specifying what an
> "Macintosh alias" is I wonder how if at all filenames with a ':' are
> supposed to be specified...

There is a paper describing structure on google:
http://www.geocities.com/xhelmboyx/quicktime/formats/alias-layout.txt
Alias records contains ':' instead of '/'

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