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jp1 · (This post was last modified: 05-04-2011 11:06 PM by jp1.)

Hi,

I'm a developer and want to get C200 working with our device,
which acts as UPnP/DLNA server. But it servers no static files
(like do usuall NAS boxes) but live DVB channels. Box has
2 DVB-S2 tuners build-in.

DLNA works well with all those "smart" TVs from Samsung,LG,
Sony and so (including networked Blueray players from same
companies).

The issue I have with C200 is that for unknown reason (at least
for me) the box is using "Range" option inside connection
and all is reading only 500k bytes. then it closes connection
and open new one with same GET command, but with range
from 500k to 1M, and so on ...

I would like to ask if there is any way how to signal to C200
that connection should stay active all time. I understand
that C200 is doing data caching, but closing and opening
TCP connection again and again is not good behaviour
if live stream is transmitted.

Plrase let me know if there is a way how to say C200
to not open/close connection on every data chunk.

Regards

Honza

Here you can see some log of data communication on TCP port 8200:

--CONNECTION 1 OPEN--
HEAD /MediaItems/28.mpg HTTP/1.1
Host: 192.168.100.75:8200
User-Agent: Syabas/00-00-000000-00-000-400-000/00-000 Firefox/0.8.0+ (gaya3 TV Res1280x720; Browser Res1100x656-32bits; Res1280x720; mac_addr=00.00.00.00.00.00)

HTTP/1.1 200 OK
Content-Type: video/mpeg
transferMode.dlna.org: Streaming
Connection: close
Date: Wed, 04 May 2011 20:51:58 GMT
EXT:
realTimeInfo.dlna.org: DLNA.ORG_TLAG=*
contentFeatures.dlna.org: DLNA.ORG_PN=MPEG_TS_SD_NA_ISO;DLNA.ORG_OP=00;DLNA.ORG_CI=0
Server: SmartImp DLNADOC/1.50 UPnP/1.0 MiniDLNA/1.0
--CONNECTION 1 CLOSE--

--CONNECTION 2 OPEN--
GET /MediaItems/28.mpg HTTP/1.1
Host: 192.168.100.75:8200
User-Agent: Syabas/00-00-000000-00-000-400-000/00-000 Firefox/0.8.0+ (gaya3 TV Res1280x720; Browser Res1100x656-32bits; Res1280x720; mac_addr=00.00.00.00.00.00)
Range: bytes=0-524287

--CONNECTION 2 CLOSE--

--CONNECTION 3 OPEN--
GET /MediaItems/28.mpg HTTP/1.1
Host: 192.168.100.75:8200
User-Agent: Syabas/00-00-000000-00-000-400-000/00-000 Firefox/0.8.0+ (gaya3 TV Res1280x720; Browser Res1100x656-32bits; Res1280x720; mac_addr=00.00.00.00.00.00)
Range: bytes=524288-1048575

--CONNECTION 3 CLOSE--

OK, just learnt about response code 406 (Not Acceptable) which, according DLNA
Interoperability guidelines v1.0, should be used if Range: option is unsupported:

Quote:7.8.22.7 If any requested range for the specified URI can
never be processed/satisfied by the HTTP server, for
example, in the case of real-time transcoding or live
contents, the HTTP server must respond with 406 (Not
Acceptable).

But if I'm using that then C200 browser returns to channel listing.
No more attempt (no any futher GET command follow)

I think the C200 acts incorrectly here.

Honza

Here is log of communication:

Code:

GET /MediaItems/28.mpg HTTP/1.1

Host: 192.168.100.75:8200

User-Agent: Syabas/00-00-000000-00-000-400-000/00-000 Firefox/0.8.0+ (gaya3 TV Res1280x720;  Browser Res1100x656-32bits;  Res1280x720;  mac_addr=00.00.00.00.00.00)

Range: bytes=2097152-2621439

HEAD /MediaItems/35.mpg HTTP/1.1

Host: 192.168.100.75:8200

User-Agent: Syabas/00-00-000000-00-000-400-000/00-000 Firefox/0.8.0+ (gaya3 TV Res1280x720;  Browser Res1100x656-32bits;  Res1280x720;  mac_addr=00.00.00.00.00.00)

HTTP/1.1 406 Not Acceptable

Content-Type: text/html

Connection: close

Content-Length: 136

Server: SmartImp DLNADOC/1.50 UPnP/1.0 MiniDLNA/1.0

<HTML><HEAD><TITLE>406 Not Acceptable</TITLE></HEAD><BODY><H1>Not Acceptable</H1>An unsupported operation was requested.</BODY></HTML>

jp1 · 05-10-2011, 12:30 AM

Nobody with comment?

Strange, I would imagine that possibility to connect PCB to live satellite (or terestrial) signal should be good extension.

The only problem is that PCB "thinks" the remote data are static and so it does stepped requests (open connection,
ask for 500k data and close connection, then open new connection, ask for next 500k data and again close
connection). I think it comes from idea, that server is able to push requested chunk of data in max network
speed. But such assumption is not correct for live streaming when server is able to send data only
on transmitted speed.

That is why I'm asking if there is a way how to tell PCB that data are LIVE and so that it must
not do stepped read.

Honza

jp1 · 06-09-2011, 09:36 AM

OK, closing this as nobody cares Sad

[buzzwords]
If somebody, accidentally, be interesting what the device I mean,
check on its homepage on http://www.nessiedvb.com
[/buzzwords]

/Honza

H2Deetoo · 06-22-2011, 10:33 AM

This would be very interesting for sure!
Please guys, have a look at this issue!

Rgs H2Deetoo,

accident · 06-22-2011, 12:52 PM

There is a live mode in the sdk player available to flash apps.. I think it was originally added for live youtube streams but may do what you need. Of course that means making a flash app though.

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