[mythtv] [mythtv-commits] Ticket #1866: DVB Scanning - Remaining Issues
Janne Grunau
janne-mythtv at grunau.be
Sun Aug 20 21:53:35 UTC 2006
On Saturday 19 August 2006 12:27, MythTV wrote:
> #1866: DVB Scanning - Remaining Issues
>
> * status: assigned => closed
> * resolution: => fixed
>
> Comment:
>
> The behaviour of tuned scan as it now exists is to
> tune to the given transport and just scan that. ie.
> It's the same as transport scan just with a user
> defined tranport.
>
> Previously (mythtv <= 0.19) the information received
> in the NIT would be used to add other transports to
> the list to be scanned.
>
> The current behaviour is more logical from a users
> point of view, since they asked it to scan the
> given transport, and are not expecting it to go
> wandering off scanning other transports.
I disagree. The scan is called "Full scan (tuned)". I would expect that
something called full scan will find all or almost availabe channels.
> The old behaviour can be acheived by doing the
> tuned scan, and then existing transport scan,
> as the tuned scan will populate dtv_multiplex
> from the NIT found on the first transport.
This is for a first time user confusing and for anyone else impractical.
Most users of Full scan (tuned) use it since there is no full scan for
DVB-S and DVB-C.
I looked into this 2 weeks ago and agree that it can't fixed easily. We
are probably not able to have the old behaviour in 0.20 but it should
be fixed sometime.
> Alternatively, full scan is available to find
> all the transports being broadcast, which will
> work even if the transports do not provide any
> information about other transports, as happens
> in certain countries.
There is no full scan for DVB-S and DVB-C. I don't think that an
equivalent to the DVB-T full scan is practical for DVB-S and DVB-C.
Astra 19.2E has about 100 transponders and I don't think it's a good
idea to maintain for several orbital positions lists of transponders in
the MythTV source code. For DVB-C we could scan the appropiate frecency
tables we have already. Although it is most of the time more effort
than needed.
Janne
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