[linux-dvb] Re: DVB and MPEG-4

[Christian Schuld <chris@sonnengesicht.de>]

Hi,

On Tuesday 07 January 2003 11:03, Peter Maersk-Moller wrote:
> Apparently on Eutelsat W3 at 7.0E on transponder C3 11262MHz
> horizontal they are broadcasting in MPEG-4 rather than MPEG-2.
>
> Has anyone been able to receive a stream (with the linux DVB
> driver) and done something useful with it ?

It is a TCP/IP encapsulated stream. Here is the log of a quick test, please 
interpret yourself:

pii:/home/chris/Downloads/dvbtune # ./dvbtune -n 2001
Successfully opened network device, please configure the dvb interface
pii:/home/chris/Downloads/dvbtune # ifconfig dvb0_0 up
pii:/home/chris/Downloads/dvbtune # tcpdump -n -i dvb0_0
tcpdump: WARNING: dvb0_0: no IPv4 address assigned
tcpdump: listening on dvb0_0
11:40:09.167710 192.168.135.39 > 224.3.0.33: (frag 54185:1480@1480+)
11:40:09.168894 192.168.135.39 > 224.3.0.33: (frag 54185:1480@2960+)
11:40:09.169921 192.168.135.39 > 224.3.0.33: (frag 54185:1307@4440)
[...]

> In principle, a budget card should be able to take the transponder feed
> as a whole, but if the driver (or is it the firmware ?) adds a
> MPEG-2 TS header to what it can identify as MPEG-2, it might not be
> very useful data coming out.

As you can see you can have the driver do the network stuff and grab stream 
from 224.3.0.33 to process it further.

> Any comments, thoughts etc ?

HTH,

> --PMM

Christian


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