[vdr] [ANNOUNCE] DVB-S2 + H.264 support for VDR-1.5.12
abraham.manu at gmail.com
Wed Jan 2 19:13:54 CET 2008
Reinhard Nissl wrote:
> Manu Abraham schrieb:
>>> I know DVB-S2 cards can do DVB-S that's the reason to force VDR to use
>>> DVB-S only cards for DVB-S before the DVB-S2 ones, which if you want a
>>> DVB-S2 channels, so is your DVB-S2 cards free.
>>> But one should get a way to tell VDR no to try to tune DVB-S2 channels
>>> on DVB-S card.
>> You can do that. In fact the application should do a DVBFE_GET_INFO. This will query
>> the capability of that specific driver. Based on the driver capabilities, issue a tuning
>> request. That way a tune will be attempted only on the capable device.
>> It is a simple check, though.
>> The patched version doesn't look at the device capability flags, before issuing a tune ?
>> Or is something else wrong/missing ?
> I must admit, I didn't have a look at the source code so far, but
> from what I recall, I don't think that it is that easy. I think,
> a simple check will only make VDR tell you that the channel in
> question cannot be received.
> I've experienced myself that VDR used the DVB-S2 card for a DVB-S
> recording and then endlessly tried to switch to a DVB-S2 channel
> using the DVB-S card -- obviously without success.
How can you ask a DVB-S device to tune to DVB-S2 ? Poor demodulator,
it has to do what it is not even capable of. :)
> VDR's device selection logic is already quite complex. It has to
> deal with FF cards which have so far been used to watch the DVB-S
> channels, cards which provide CI interfaces and simple receiver
> cards. Moreover it now would have to deal with cards capable of
> doing DVB-S2, with or without CI interface respectively.
The logic wouldn't be much different. It is the same as requesting a DVB-C
device to be tuned to DVB-S. The CI interface doesn't make the hardware
look any different.
> As I'm only distributing the DVB-S2 part which Marco Schlüßler
> provided several months ago, I've contacted him and asked him for
> an update.
Ok, I will ask Marco on the relevant. Thanks for the feedback.
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