[mythtv] Problems with DVB CRCs
Allan Stirling
Dibblahmythml0015 at pendor.org
Tue Nov 22 07:25:54 EST 2005
Daniel Kristjansson wrote:
> On Mon, 2005-11-21 at 13:31 +0000, Allan Stirling wrote:
>
>>I'm looking at why I am seeing consistent problems with CRC errors reported in
>>Myth, where other tools appear to be happy with the data stream.
>>
>>According to:
>>http://happy.emu.id.au/lab/tut/dttb/dtbtut4b.htm
>>CRC (PES_CRC_flag)
>>crc is optional in a PES packet. Looking in mpeg/pespacket.cpp,h this doesn't
>>appear to be implemented.
>
> Oops. In my defense this wasn't written to be a general PES packet
> parser, it was written to handle just ATSC PSIP tables which have
> additional constraints on the PES packet, and then got extended to
> handle DVB tables without the aid of the relevant standards documents.
>
>
>>The reason I'm thinking this is a Myth issue, rather than a card issue is it
>>happens on:
>
> ... This is really easy to fix, so I'll do it today or tomorrow and
> we'll see if it fixes your problem ...
>
This fixes the issue with CRCs on Astra-28.2 for me. I think it should be
possible to rip out the "CRC faulty" card stuff now :)
Cheers,
Allan.
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