[Helix-client-dev] X-MP3-DRAFT-00
"Robert Craig" <[email protected]> Fri, 30 Mar 2012 15:17:50 -0700
| Newsgroups | gmane.comp.multimedia.helix.devel |
|---|---|
| Message-ID | <059AF07365DC474393A19A3AF187DF740855B010@NAHALD.us.int.genesyslab.com> |
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Thanks Jamie. That helps.
=20
When I view the RTP stream in WireShark, I don't see any ADU descriptor
(i.e. one or two-byte header), so I am wondering why people call it an
"ADU" frame. I just see the standard MP3 32-bit header at the start of
each packet.
=20
-- Rob Craig
=20
Jamie Gordon wrote:
> The is no definitive specification. :)
=20
> The packet payload is simply one complete ADU frame (no payload
> headers). RTP clock rate is equal to audio sampling rate. Marker bit
is
> unused.
=20
> The definition of an ADU frame can be found in RFC 3119.
=20
> Thanks,
> Jamie
=20
On 03/30/2012 11:53 AM, Robert Craig wrote:
> Can anyone post details on the MP3 via RTSP packet format that Helix
> uses. It's called X-MP3-DRAFT-00, but I can't find a definitive
> description of this format anywhere on the Web, just a few off-hand
remarks.
>=20
> Thanks!
>=20
> Rob Craig
>=20
=20
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<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New"'>Thanks
Jamie. That helps.<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New"'><o:p> </o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New"'>When
I view the RTP stream in WireShark, I don't see any ADU descriptor (i.e. =
one or
two-byte header), so I am wondering why people call it an =
"ADU"
frame. I just see the standard MP3 32-bit header at the start of each =
packet.<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New"'><o:p> </o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New"'>--
Rob Craig<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New"'><o:p> </o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New"'>Jamie
Gordon wrote:<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New"'>>
The is no definitive specification. :)<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New"'><o:p> </o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New"'>>
The packet payload is simply one complete ADU frame (no =
payload<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New"'>>
headers). RTP clock rate is equal to audio sampling rate. Marker bit =
is<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New"'>>
unused.<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New"'><o:p> </o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New"'>>
The definition of an ADU frame can be found in RFC =
3119.<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New"'><o:p> </o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New"'>>
Thanks,<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New"'>>
Jamie<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
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New"'><o:p> </o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New"'>On
03/30/2012 11:53 AM, Robert Craig wrote:<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New"'>><i>
Can anyone post details on the MP3 via RTSP packet format that =
Helix<o:p></o:p></i></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New"'>><i>
uses. It's called X-MP3-DRAFT-00, but I can't find a =
definitive<o:p></o:p></i></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New"'>><i>
description of this format anywhere on the Web, just a few off-hand =
remarks.<o:p></o:p></i></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New"'>><i><o:p> </o:p></i></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New"'>><i>
Thanks!<o:p></o:p></i></span></p>
<p class=3DMsoNormal><span =
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New"'>><i><o:p> </o:p></i></span></p>
<p class=3DMsoNormal><span =
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Rob Craig<o:p></o:p></i></span></p>
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