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Tom Sparks | 5 Aug 07:28

IP multicasting

Can Theora be streamed IP Multicasting?
Can Cortado support IP multicast?
if not, could some add IP multicasting to Cortado?

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Ralph Giles | 5 Aug 08:55
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Re: IP multicasting

On Mon, Aug 4, 2008 at 10:31 PM, Tom Sparks <tom_a_sparks <at> yahoo.com.au> wrote:

> Can Theora be streamed IP Multicasting?

Yes. There's an internet draft, but it's a bit experimental. The
elphel.com cameras can do it, for instance.

> Can Cortado support IP multicast?

It doesn't currently support that.

> if not, could some add IP multicasting to Cortado?

Someone certainly could. :-)

 -r
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yorn | 5 Aug 09:56

Re: IP multicasting

> > Can Theora be streamed IP Multicasting?
> 
> Yes. There's an internet draft, but it's a bit experimental. The
> elphel.com cameras can do it, for instance.

That sounds interesting, could you hint me to this draft?

Thanks - Yorn
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Ralph Giles | 5 Aug 18:11
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Re: IP multicasting

On Tue, Aug 5, 2008 at 12:56 AM,  <yorn <at> gmx.net> wrote:

>That sounds interesting, could you hint me to this draft?

http://svn.xiph.org/trunk/theora/doc/draft-ietf-avt-rtp-theora-00.txt

Linked from the xiph.org front page. IIRC it needs updating with the
header-transmission stuff from the corresponding vorbis draft.

 -r
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Yorn | 11 Aug 09:57

Re: IP multicasting

Ralph,

thanks for the link, I saw that draft before, but didn't get the direct 
connection to multicast transmission.

Is there somebody working on an implementation? And is there an agreement for 
the header transmission, as this seems to be quite vague from the draft. 

Are there any plans for firefox to implement rtp for the video-tag?

Regards - Yorn

Am Dienstag 05 August 2008 18:11:36 schrieb Ralph Giles:
> On Tue, Aug 5, 2008 at 12:56 AM,  <yorn <at> gmx.net> wrote:
> >That sounds interesting, could you hint me to this draft?
>
> http://svn.xiph.org/trunk/theora/doc/draft-ietf-avt-rtp-theora-00.txt
>
> Linked from the xiph.org front page. IIRC it needs updating with the
> header-transmission stuff from the corresponding vorbis draft.
>
>  -r
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Chris Double | 11 Aug 10:14

Re: IP multicasting

On Mon, Aug 11, 2008 at 7:57 PM, Yorn <yorn <at> gmx.net> wrote:
> Are there any plans for firefox to implement rtp for the video-tag?

No plans at the moment.

Chris.
--

-- 
http://www.bluishcoder.co.nz
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Ralph Giles | 11 Aug 19:41
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Re: IP multicasting

On Mon, Aug 11, 2008 at 12:57 AM, Yorn <yorn <at> gmx.net> wrote:

> Is there somebody working on an implementation? And is there an agreement for
> the header transmission, as this seems to be quite vague from the draft.

The elphel implementation is the only one I'm aware of. Look at the
vorbis draft for more details on the proposed header transmission.
Both codecs have essentially the same requirements there and the plan
is to use the same format. The theora draft just hasn't been updated.

 -r
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Yorn | 11 Aug 20:49

Re: IP multicasting

I read the vorbis-rtp draft as well. This draft gives only suggestions on how 
to transfer the headers (because it is not an RTP issue). Additionally I 
found some discussions from 2005 on the xiph-rtp mailinglist (e.g. about 
using SDL and how to reconstruct the header by only few information). This 
was the reason for my question: If there was an implementation it would have 
been nice to know what method it uses.

Maybe it's time to begin ;-)

Regards - Yorn

Am Montag 11 August 2008 19:41:33 schrieb Ralph Giles:
> On Mon, Aug 11, 2008 at 12:57 AM, Yorn <yorn <at> gmx.net> wrote:
> > Is there somebody working on an implementation? And is there an agreement
> > for the header transmission, as this seems to be quite vague from the
> > draft.
>
> The elphel implementation is the only one I'm aware of. Look at the
> vorbis draft for more details on the proposed header transmission.
> Both codecs have essentially the same requirements there and the plan
> is to use the same format. The theora draft just hasn't been updated.
>
>  -r
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Ralph Giles | 11 Aug 20:54
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Re: IP multicasting

On Mon, Aug 11, 2008 at 11:49 AM, Yorn <yorn <at> gmx.net> wrote:
> I read the vorbis-rtp draft as well. This draft gives only suggestions on how
> to transfer the headers (because it is not an RTP issue).

Hmm, I thought the newer draft was more clear than that. You might
want to ask on the xiph-rtp list.

There's also some test code at http://svn.xiph.org/trunk/xiph-rtp/ to
get you started. I think it does inline headers though.

 -r
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Tom Sparks | 5 Aug 16:38

Re: IP multicasting

On Mon, 2008-08-04 at 23:55 -0700, Ralph Giles wrote:
> > On Mon, Aug 4, 2008 at 10:31 PM, Tom Sparks
> > 
> > > Can Theora be streamed IP Multicasting?
> > 
> > Yes. There's an internet draft, but it's a bit
experimental. The
> > elphel.com cameras can do it, for instance.

What software can I use to do the streaming?

> 
> > 
> > > Can Cortado support IP multicast?
> > 
> > It doesn't currently support that.
> > 
> > > if not, could some add IP multicasting to
Cortado?
> > 
> > Someone certainly could. :-)
> > 
> >  -r
> > 

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