Tvheadend

Hello,

i would like to stream some channels using directly hdmi for each channel, so i'm looking for encoders to transmit the channels to my NAS tvheadend server.

I don't know which hdmi encoders are recommended to work without problems with tvheadend, i found these but i'm not sure about them : http://www.oupree.com/HD-Video-Encoder/

I really need advises about that, every little information is welcome.

Thank you .