multiple cards, one program source
If your system contains multiple video sources (in my case: ziggo-digital and ziggo-analog) but you have a single source for the programmes (in my case tv_grab_bl_py) then you probably want that the program listing is combined: one line per channel.
To accomplish this, the following items must be equal for the channels in the different video-sources:
- the callsigns
- the channel numbers
- the xmltv id
See also: grabbing