Andreas U. Trottmann wrote: >Hello Linux-dvb, > >After the really great news that descrambling with ca_zap and a >Twinhan clone Technisat SkyStar 1 CI now works, there is a minor >issue. > >Basically, after a certain time (which can range from two minutes >to several hours), descrambling suddenly stops, and the stream I >get from /dev/dvb/adapter0/dvr0 contains no sensible audio/video >data anymore. > >Running ca_zap again (with the same parameters as the initial >run) makes the stream work again. > >The first "solution" I tried to remedy this situation was to run >ca_zap periodically in the background. While this sort of cures >the problem (no long-time freezing anymore), it sometimes causes >a disruption of the stream right at the moment ca_zap is run. > > >Is there any better way to do this? Can we send something like a >"keep alive" command to the CAM that doesn't disturb a >descrambling operation that's already in place? > >Or, is there a way to programmatically find out when the CAM >needs to get "reminded" of the fact that it should descramble, so >we don't have to run ca_zap every couple seconds, but only when >it's really needed? > > > > Your descrambling will stop when the CA_PMT changes. We will need to create a thread in ca_zap, which keeps sending CA_PMT messages to the CA module, maybe something in the order of say 5 minutes. Manu
