[vdr] How to properly attach stream to live view?
udo_richter at gmx.de
Sat Jun 7 12:43:34 CEST 2008
Is there a proper way to attach another stream receiver to the currently
receiving channel, and - more important - disconnect it properly on
The problem arises from difficulties with the osdteletext plugin. (see
The problem of the current implementation is that on channel change the
teletext receiving stream is disconnected on
cStatus::ChannelSwitch(dev,0), which is _after_ GetDevice picked the
device for the next channel. And since the teletext stream is still
being received, the primary receiving device (FF card) is 'in use' and
has NeedsDetachReceiver set - so a budget card is preferred for live
viewing. (FF cards normally use no cReceivers at all for live view, so
the device is automatically 'free' on channel switch.)
(Btw: On 2x budget only systems, it seems as if the live view will
constantly switch between the devices for the same reason, or?)
Taking a look at the subtitles receiver shows that the subtitles stream
is disconnected at the beginning of cDevice::SetChannel, which is right
before the GetDevice call, thus a FF card is 'free' again at the
If there's no proper way to solve this right now, I could imagine a few
VDR changes that would:
- Find a way to mark a receiver as being 'live related' and disconnect
it before live channel switching.
- Find a way to mark a receiver as being 'extremely unimportant', and
don't count them as NeedsDetachReceiver or as Receiving() in that case,
maybe by using -1 as priority.
- Extend GetDevice to ignore some receivers that will be disconnected
afterwards anyway - maybe define 'related' receivers that will
- Notify plugins about the upcoming channel switch _before_ the
GetDevice call, so live receivers can be disconnected.
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