[mythtv] [mythtv-commits] Ticket #3541: Backend Crashes When Recording From Mux A In The UK (Freeview / DVB-T)

[Allan Stirling]

MythTV wrote:
> #3541: Backend Crashes When Recording From Mux A In The UK (Freeview / DVB-T)
> -----------------------+----------------------------------------------------
>  Reporter:  anonymous  |        Owner:  danielk
>      Type:  defect     |       Status:  new    
>  Priority:  minor      |    Milestone:  unknown
> Component:  dvb        |      Version:  head   
>  Severity:  medium     |   Resolution:         
>   Mlocked:  0          |  
> -----------------------+----------------------------------------------------
> 
> Comment(by danielk):
> 
>  Can you try the attached patch?
> 
>  A long time ago it was reported to me that the cards with the "Philips
>  TDA10046H DVB-T" frontend destroyed the CRC of their PMT tables and so we
>  had to turn off error checking and risk crashes in order to support this
>  card at all.
> 
>  However, a similar report was also filed about "DST DVB-S" cards, which
>  I've  now tested myself and it does not exhibit the reported problem, at
>  least with drivers produced in the last year. The attached patch turns off
>  the "don't check and fly blindly" behavior in MythTV for all cards. If you
>  can tune in channels at all with this patch applied, it will take me 5
>  minutes to commit a proper fix.
> 

AFAIR, this was before we handled packets which (validly) 
had no CRC.

There is nothing that the frontend does that can change the 
contents of the packets. The only card that could possibly 
do something like this is the 'fully featured' technotrend 
cards, which can (again, as far as I know) rewrite the stream.

Cheers,

Allan.