[linux-dvb] Re: TS payload extraction?

[Johannes Stezenbach <js@convergence.de>]

Andy Coates wrote:
> 
> Is there a way with a full-featured card to just read the payload
> only from one of the devices (dvr?)
> 
> At the moment I'm using:
> 
>   pesFilterParams.pid     = pid;
>   pesFilterParams.input   = DMX_IN_FRONTEND;
>   pesFilterParams.output  = DMX_OUT_TS_TAP;
>   pesFilterParams.pes_type = pestype; // this is currently DMX_PES_OTHER
>   pesFilterParams.flags   = DMX_IMMEDIATE_START;
> 
> And that gives me a TS stream containing the pid I've set.
> 
> Is there a way for the drivers to do all the work and just give me
> the payload data? 

For PES data use:

   pesFilterParams.output  = DMX_OUT_TAP;

and read from the demux device (not the dvr device). You will then get
PES packets, but the reads are not aligned -- you have to search for the
start of the first PES packet manually.

Johannes


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