Post here to ask any questions about hardware suitability, configuration in ZoneMinder, or experiences. If you just want to know if something works with ZoneMinder or not, please check the Hardware Compatibility sections in the forum, and the Wiki first. Also search this topic as well.
It actually has just 4 Bt878a which each handle 4 channels of vid and 1 audio.
Popped it in a machine, dmesg shows the video0-3 get created ok using default card=0 config, and xawtv shows video from all channels.
[ update ] card=77,77,77,77 works even better - all 16 inputs show as Composite.
I've not tried audio yet, and I would like to get the digital i/o connector working to use as trigger inputs and outputs, but so far I am happy.
They also do a card with 8 vid 8 audio and I think this as 8 chips so my guess is that you would get full frame rate on all 8 channels, but it is £250 ish vs the £130 for this one.