[NUT-devel] NUT documentation

[Måns Rullgård]

Oded Shimon <ods15 at ods15.dyndns.org> writes:

> On Sat, Oct 28, 2006 at 12:45:11PM +0100, Måns Rullgård wrote:
>> Oded Shimon <ods15 at ods15.dyndns.org> writes:
>> 
>> > On Sat, Oct 28, 2006 at 11:47:05AM +0100, Måns Rullgård wrote:
>> >> Luca Barbato <lu_zero at gentoo.org> writes:
>> >> 
>> >> > Måns Rullgård wrote:
>> >> >
>> >> >> 
>> >> >> What you're saying is that because any system CAN be abused, rather
>> >> >> try to start out with something sane, you incorporate an existing,
>> >> >> already very abused, "system" lock, stock and barrel.  Makes no sense
>> >> >> to me.
>> >> >
>> >> > Last time we discussed it we ended with a "who implements the codeclist
>> >> > got it in the spec", nobody stepped up with a list nicer than what we
>> >> > have now.
>> >> 
>> >> I don't see ANY list.  I don't care if you copy someone else's list,
>> >> or invent your own, but whatever you do, it HAS to be in the spec.
>> >
>> > one of the many proposed lists:
>> > http://lists.mplayerhq.hu/pipermail/nut-devel/2006-June/000433.html
>> 
>> Yes, there were a few PROPOSED lists.  None of them were adopted in
>> the actual spec.
>> 
>> > This is mostly grave-digging. I've never cared strongly about the issue. 
>> 
>> Therein lies the problem.  You can't set out designing a file format
>> ignoring one of the fundamental aspects.  Until this changes, I
>> consider the NUT format incomplete and a waste of time.
>
> Would it make you happy if something like this was added to the spec?
>
> possible fourcc's:
> "XVID","DIVX","DX50","FMP4"	MPEG-4 Part 2

Why so many IDs for the same codec?

> "H264","h264"			MPEG-4 Part 10
> "vrbs"			Xiph.org Vorbis
> "\x00\x50"			MP1, MP2
> "\x00\x55"			MP3
> ....
> * note: the list is not a complete list and values can be added in the 
>   future
>
> Since I don't care about the issue, I don't mind if you add such a thing 
> to the spec... For you this is fundemental. For me, this is bikeshed.

So given a NUT file, how do you know which codec is used if there is
no official list of codec IDs?

-- 
Måns Rullgård
mru at inprovide.com