[vdr] [PATCH] time warp

Stefan Huelswitt s.huelswitt at gmx.de
Thu Jun 23 17:55:11 CEST 2005


On 23 Jun 2005 Rainer Zocholl <UseNet-Posting-Nospam-74308- at zocki.toppoint.de> wrote:
> s.huelswitt at gmx.de(Stefan Huelswitt)  22.06.05 15:11
> 
>>If CRC checking is enabled on dmx-filter setup
>>(dmx_sct_filter_params.flags |= DMX_CKECK_CRC), 
>>the driver does it for you.
> 
> And what happens with the data if it fails?
> Is it decarded or just "tagged" to be invalid?

AFAIK it's discarded by the driver.

>>VDR doesn't enables the check.
> 
> Ah, that explains easily the "garbage" in "time", or?
> Does that explain the "unknown picture type" problem too?

AFAIK CRC checking only applies to section data and not to PES
data.

>>This would be difficult, 
>>as not all tables are CRC protected.
> 
> VDR knows which tables are CRC protected, or not?

I think this can easily be tested out (if not documented
somewhere in the DVB specs), but VDRs filter API would
have to be extended to support CRC selection.

Regards.

-- 
Stefan Huelswitt
s.huelswitt at gmx.de  | http://www.muempf.de/



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