====== LKV373A: a $40 HDMI capture solution? ======
The Lenkeng LKV373A is a $40 HDMI-over-IP network sender used for sending video over a network to a remove TV, but can it be used instead as a cheap video capture device?
* [[https://odysee.com/@OpenTechLab:f/otl-003-lkv373a-hdmi-capture:2|odysee]]
* [[https://www.youtube.com/watch?v=SAvGylthpkU|YouTube]]
* [[https://peertube.social/videos/watch/e7ce6e0f-c926-41b7-abd3-05090fcdc84c|peertube.social]]
* [[https://www.banggood.com/LKV373A-HDMI-Extender-TX-Sender-100-120m-Support-1080P-Over-Cat5-Cat5e-Cat6-p-1175541.html?p=SD062212952342201708|LKV373A Tx on Banggood]] @ $38.99
===== Danman's Blog =====
* [[https://blog.danman.eu/new-version-of-lenkeng-hdmi-over-ip-extender-lkv373a/|New version of Lenkeng HDMI over IP extender – LKV373A]]
* [[https://blog.danman.eu/reverse-engineering-lenkeng-hdmi-over-ip-extender/|Older post about a previous hardware version]]
===== Firmware Repository =====
* [[https://drive.google.com/drive/folders/0B3mWuDyxrXyKSTZZZlRESlpBZmM?usp=sharing|Daniel Kučera's Google Drive Firmware Repository]]
===== Graphics Tests =====
* [[http://www.asty.org/cmatrix/|cmatrix]]
* [[ftp://www.x.org/pub/X11R6.8.1/doc/glxgears.1.html|glxgears]]
* [[http://www.minetest.net/|Minetest]] - Open-Source Minecraft-like.
===== Commands =====
==== Block Zero Length UDP Packets ====
sudo iptables -t raw -A PREROUTING -p udp -m length --length 28 -j DROP
==== Configure Unicast ====
curl "http://192.168.0.24/dev/info.cgi?action=streaminfo&udp=n&rtp=y&multicast=n&unicast=y&mcastaddr=192.168.0.2&port=5004"
===== John Kelly's LKV373A Setup Tool ====
[[https://github.com/John-K/lkctl]]
===== More Tricks =====
Very (0.2s) low latency viewing technique:
socat UDP-RECV:5004 - | mplayer -fs -
...or...
socat UDP-RECV:5004 - | tee recording.ts | mplayer -fs -
...to record simultaneously.
===== Credits =====
* Intro Music: [[http://freemusicarchive.org/music/Logan_Takahashi/Live_at_WFMU_on_Champ_Sound_with_DJ_Guy_4282016/|Logan Takashi - Orb-O]] (CC-BY-NC-ND).