[mythtv] why is vbi device kept busy?
cafeschintze at gmx.net
Mon Mar 17 20:10:02 EST 2003
as I can see, mythtv keeps the vbi-device busy during the use of the
tuner chip. Is it really necessary to have that done? The reason IŽm
asking is that for foreign mythtv-users (Austria, Germany,
Switzerland, France, Italy and Turkey) there exists a very good
alternative to using the tv_grab_<cc> application called nxtvepg
(http://nxtvepg.sourceforge.net/). The interesting thing about it
is, that it constantly gathers the programm information over the
tv-tuner card, not over the internet. This also makes it very
interesting for using mythtv in standalone hardware, so no modem or
lan connection is needed.
Christian Hoenig (www.christianhoenig.de) wrote a few example
scripts for importing the nxtvepg data into the mythtv database.
Thanks again Christian.
Nxtvepg uses a passive acquisition mode that gathers its
information only when
a) the tuner is not used by another application
b) the tuner is used, but the channel is set to one of those
providers that transmit programm data (see
http://nxtvepg.sourceforge.net/provnets.html to get an idea of what
All provided that the vbi device is not kept busy. Maybe it would be
possible to select wether mythtv should open the vbi-device or not.
Another solution to the problem would be the possibility to execute
a shell skript, that could run each time mythtv changes from or to
using the tuner chip and which would start/stop nxtvepg. Using
nxtvepg whenever the tv-card is not in use, would be already great.
Also I have talked to the programmer of nxtvepg. He says, that it's
planned to write a daemon which could provide the vbi data between
different applications in a more centralized manner. But in order to
use this with mythv, a few changes would have to be done to mythtv.
I really don't know much about it.
Ok, enough for now. I can't really code (unfortunately). But maybe
someone who can, could just tell me if I'm thinking in the right
cafeschintze mailto:cafeschintze at gmx.net
More information about the mythtv-dev