Several important parameters of network video encoders

There are still a lot of radio and television field with traditional cameras, rather than the network camera, there is no way given IP address directly on the Internet, like traditional video camera output is not streaming, so the data will be very large and do not fit in transmission on the network. Hence the need for a video encoder to compress video such decreased output in the camera suitable for network transmission, and can set the IP address, and having a plug flow function. In the encoder is normally selected according to their own application scenario is determined, the encoder in the choice of the network is important to note several parameters.
First, the encoder has an interface SDI / HDMI input
Why choose SDI / HDMI interface SDI / HDMI belong definition interface, but also a serial digital interface for video transmission, is based on the serial link Smpte standard. SDI / HDMI using the original video data transmission, not compressed, lossless quality guarantee, real show video content. Since the video signal were not compressed, enabling real-time transmission of video signals, the image will not cause delay.
Second, 4G network extension function, the basic requirements wifi
wifi and 4G networks function in a video encoder is a must. Because in many cases, if no WIFI network under the circumstances, you can use the 4G capabilities of its 3G network speed network speed up to ten times to several times, one of a new generation of high-quality wireless broadband communications standards, with high speed, low latency characteristics of internationalization. Selection may also preferably be built dual (2.4G / 5.8G) wifi module supports USB expansion 4G-LTEDongle, this can be achieved in various forms of wireless networks.
Third, having a function of H.265 coding technique
At present most of the webcast platform are used in H.264 encoding technology, H.265 High Efficiency Video Coding is a video compression standard, the new H.264 video coding Following enacted. H.265 (HEVC) technology is considered not only enhance the video quality, but also to achieve H.264 / MPEG-4 AVC compression ratio twice as (the same bit rate was reduced to 50% picture quality) to support even 4K resolution ultra high-definition television, the highest resolution up to 8192 × 4320 (8 K resolution). Thus H.265 techniques to improve the relationship between the streams, encoding quality, delay and complexity of the algorithm, optimized settings.
Fourth, support for multi-protocol capabilities (RTMP / RTSP / SRT)
Currently, the network broadcast encoder output to support RTMP / RTSP protocol, RTMP protocol is now standard encoder output, due to the current huge PC market, PC mainly Windows, Windows the browser basically support flash, Flash and supports RTMP protocol, so basically all of the encoders (cameras and the like) support RTMP output. RTMP HTTP protocol stream than the delay (typically 10 seconds) RTMP considered low delay, it is generally more live applications.
Next, highlight some agreement SRT, SRT is nowadays very popular open-source low-latency video transmission protocol. SRT use reliable transmission technology, can successfully achieve a normal Internet environment, among many, safe and reliable transmission and distribution of high-definition video. SRT support AES encryption to ensure end to end video transmission security. Reliability, SRT before transmission to ensure the stability by correcting technique (FEC).
Low latency, since the SRT UDT protocol built on top of, UDT protocol to solve the problem of high transmission delay. UDT protocol is based on UDP network communication protocol. SRT solve complex transmission timing problems, can be done to support high-throughput file transfer and real-time ultra-clear video. So now many radio and television broadcast industries are willing to choose to support SRT protocol encoder.