I need a 6~20km long-range wireless HDMI video transmitter and receiver

Woy!

Which model to use when transmitting 1080 video and audio
over a distance of 6-20 km?

Requires the ability to program the parameters of the transmitter and receiver

COFDM
sawetara frekuensi 280 - 300 MHz
RF impedance 50 ohms
Konektor RF: SMA wadon
Tundha ngisor, wektu tundha end-to-end minimal yaiku 250ms
128-enkripsi bit AES lan dekripsi

TX
– Transmit power 15 - 25 W
– Input video:1VP-p,75ohm
– Input audio: stereo
– Video program format: MPEG-2
– Input video 1080 50Aku, 1080 60Aku, 1080 24P, 1080 25P, 1080 30P, 1080 50P, 1080 60P, macem-macem mode adaptif.
– Video format: NTSC, PAL bisa pesawat
suhu operasi : -20 ° C ~ +50 ° C

RX
-94dBm at 8M
gambar video: 1080
Audio output mode stereo unbalanced 300 / 200mv
suhu operasi : -20 ° C ~ +50 ° C

what is the price of such a transmitter and receiver?

According to the above demand, the below model is recommended.