[linux-dvb] How to access /dev/videoK from /dev/dvb/adapterN?

Klaus Schmidinger Klaus.Schmidinger at cadsoft.de
Fri Jun 16 11:45:06 CEST 2006


An application that uses the LinuxDVB driver can access the
DVB devices via /dev/dvb/adapterN/* (N = 0, 1, ...). However,
when it wants to, for instance, capture the current image on
a device (like VDR with its GRAB command), it needs to access
/dev/videoK, where 'K' is a number that is not directly related
to the 'N' mentioned above for the DVB device.

So VDR has to do some guessing on which /dev/videoK device might
belong to the /dev/dvb/adapterN device. This is getting particularly
problematic if there are also other /dev/video devices that have
nothing to do with any DVB devices.

Is there a defined way in which an application can query a DVB
device for its related /dev/video device?

Klaus



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