[linux-dvb] Re: MPEG-4

[Nathan Whittacre <nwhittacre@admediadisplays.com>]

Thank you for your response.  Are there any plans to implement the CI 
protocol in the budget cards?  If not, for what reasons?  Also, what 
about decoding the MPEG-4 stream that is multiplexed with the MPEG-2 
stream? 
Thanks,
Nathan

Johannes Stezenbach wrote:

> Nathan Whittacre wrote:
>  
> > I am currently working with a broadcasting company that has about 20 
> > channels on an Echostar satellite.  They are looking to multiplex a few 
> > MPEG-4 streams along side their MPEG-2 streams.  They are using 
> > Echostar's conditional access to restrict viewing.  If we used a PCI 
> > tuner with Linux that supports a CAM, could we, theoretically pull the 
> > MPEG-4 stream out of the multiplexed stream and decode it?  They tell me 
> > that some set-top-boxes can do this...but we do not have any specifics 
> > yet.  They are looking for some guidance on this matter and the stream 
> > would only be used for the PCI based tuner card on Linux.
> >    
> AFAIK CI is only supported on AV7110 based cards (Hauppauge Nexus-S),
> not on the Budget/Nova or other cards.
>
> There are two implementations of the CI prrotocol stack: An old one in the
> firmware, which has some quirks and does not work with many CAMs.
> The newer one just implements a CI link layer interface which requires
> a userspace library for handling CAMs. Code to do that is included
> in VDR http://www.cadsoft.de/vdr/, or in the libdvb from
> http://www.metzlerbros.org/dvb/index.html.
>
>
> HTH,
> Johannes
>  



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