Re: some question on w3d

Hi!

1. The output file format from the encoder is OGG.
It's the same file format used by Ogg Vorbis. It can
hold audio or video (or both). It's just an container.
Not compatible with any standard. But this should not
be a problem because once Tarkin will be ready it's
bitstream will be easily incorporated in any major
file format out there(AVI, Mpeg4, Mov,...).
2. To answer question 2 one must know the platform you
are trying to test it. Beside this you must know that
at this point Tarkin is experimental and it does not
have "motion compensation" code in it. It's like
compressiong frame after frame but not taking into
acount the redundancy across the frames (simplified:
just like a bunch of "Jpeg" file in one big file). I
guess it's little premature to test it with lots of
frames.
I test it with one frame at a time. For this I "wrote"
a simple PPM viewer (on Windows) and I test Tarkin
with that. At this time my application does not handle
PPM seqvences but only one PPM at a time.
3. I think there is none at this time, but I'm not
sure. But decoding the OGG stream outputs the PPM /PGM
files and you can look at those after that. But you
can always write one player :)

At this stage much is focused on improving the math
part of tarkin. That's the hard part...

I hope it helped. If not, just ask more.

Best Regards,
 Kondoros Attila

--- "Yang, Wei Jian (Mac)" <[email protected]> wrote:
> hello:
> 
> I have some questions on tarkin w3d codec:
> 1. What is the output format? Is it compatible with
> Mp4 or any other
> existing standard?
> 2. Is there player that can play the .ppm sequence?
> 3. Is there player can play the output .tarkin file?
> 
> Thanks
> 
> Yang, Wei Jian (Mac)
> Bell labs, Shanghai
> Lucent Technologies (China) Co., Ltd.
> Tel:         8621-5450-4555  ext. 8610
> Fax:        8621-5490-2106
> E-mail:   [email protected]
> 
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