
Overview
4K HDMI Video Encoder: Max. HDMI input in 2160p@30Hz & max. encoding output in 2160p@30Hz at 64Mbps with HEVC/H.265 and AVC/H.264 SRT, HLS, RTMP(S), RTSP, RTSP-to-SRT, RTP, TCP, UDP, Multicast, Unicast.
4K USB to IP Encoder: Support UVC video input to stream USB camera video to live platforms directly. Max. UVC input in 2160p@30Hz & max encoding output in 2160p@30Hz at 64Mbps. Support real-time switching between HDMI video and UVC video without glitches.
USB-C Powered: Low power consumption(4W) & mini size (85*63*23mm/101g); The encodoer module is powered by 5V/1A USB-C connection and comes with semi-clear acrylic casing that you can remove the housing according to your needs.
Two USB Modes: The USB-C input port supports both USB Host and USB Device modes. In Host mode, it captures UVC image for streaming; while in Device mode, it can be expanded to support USB data transmission with keyboard and mouse for PC remote control. You can contact us to custom Device mode if you need this feature.
SD Recording & NAS Recording: The HEM-4K supports recording streaming video to SD card or NAS storage system. You can set recording parameters & download the recorded videos through web UI easily.
Remote Control Feature: The hardware encoder supports DDNS that users can remotely control the encoder through domain to modify parameters and transmit video in public Internet without using any third-party live video platforms.
Low Latency Video Transmission: The HEM-4K encoder comes with built-in DDMALL proprietary Low Latency protocol. When pairing with DDMALL low-latency decoder HDD-20, HDD-20E or HDD-10, you can enable the Low Latency protocol for video transmission in LAN with latency as less as 80ms. Contact us to custom even lower latency.
Reserved Interfaces for More Features: Debugging interfaces are reserved to realize customized development requirements such as diversified control and GPS positioning. Support RS232 bi-directional communication protocol and supports access to modules such as GPS positioning and Analog audio input.
OEM Module for DIY: Contact us to get the hardware design guide of the I/O board. So you can create a totally new powerful HDMI encoder at your wish. The encoder module always works as an extension of your systems, especially for the remote streaming, surveillance systems, command dispatch, remote rescue and more.
More Features: Support real-time text/picture/time OSD and video preview. Support encoding 4 streams at the same time with different protocols. Support one click to start/stop RTMP streaming.

4K Low-Latency SRT Encoder for Live
The HEM-4K HDMI encoder is with built-in H.265 and H.264 SRT protocol. It delivers secure, reliable and high-quality SRT video streams. No fair of congested network anymore. At the same time, It supports H.265 HLS that users can playback 4K ultra-HD video with the iOS terminals.





Track your Live Video Position with GPS
The HEM-4K comes with GPS interface for the access of GPS module. With the GPS positioning, you can easily track your streaming live status. No matter where you are, you can monitor the latitude, longitude, position, altitude, speed, satellites number, date and time of the live video so that you can take crucial measures timely. This function significantly improves the efficiency of strategy decision especially for command dispatch, remote live productions, remote rescue etc.


Parameters
| Power Supply | 5V/1A (USB-C powered) | Power Consumption | 4W |
| Work Temperature | -10~50℃(14~122℉) | Storage Temperature | -20~85℃(-4~185℉) |
| Work Humidity | 10%- 90%RH (Non-condensing) | Size/Weight | 85x63x23mm/101g |
| MTBF | 30,000H | HDMI Input | HDMI2.0 |
| USB-C Input | USB2.0 | Supported Input Resolution |
3840×2160P@60/50/30/25/24Hz 1920×1080P@60/50/30/25/24Hz 1280×720P@60/50Hz |
| Supported Encoding Output Resolution |
3840*2160@30Hz,1920*1080@60Hz,1280*720@60Hz, 960*720@60Hz,960*540@60Hz,640*480@60Hz, 320*240@60Hz Max.encoding output of Primary Stream in 3840*2160@30Hz,Max. encoding output of Secondary Stream in 1920*1080p30Hz |
Codec Format | H.265 & H.264 |
| Video Bitrate | 32Kbps~64Mbps | Audio Input | HDMI embedded audio(Interface for Analog audio input is reserved) |
| Audio Codec | AAC | Audio Bitrate | 32kbps~256kbps |
| Stream Protocols | SRT, HLS, RTMP, RTMPS, RTSP, ONVIF, UDP, RTSP-to-SRT | Control | Web UI |
| Default IP | 192.168.1.251 | Default Login Credentails | admin/admin |