{"id":3678,"date":"2020-08-05T18:03:38","date_gmt":"2020-08-05T17:03:38","guid":{"rendered":"https:\/\/www.f5uii.net\/?p=3678"},"modified":"2021-10-20T08:43:11","modified_gmt":"2021-10-20T07:43:11","slug":"datv-encoder-h265-hdmi-external-box","status":"publish","type":"post","link":"https:\/\/www.f5uii.net\/en\/datv-encoder-h265-hdmi-external-box\/","title":{"rendered":"DATV: How to encode in h.265 with an external HDMI encoder"},"content":{"rendered":"

In my last article dedicated to amateur digital television<\/a>, I had the opportunity to present step by step how to make your first DATV picture broadcasts. In this new article, I propose to focus on the implementation of a small box, an H.265\/H.264 video encoder. It offers the possibility to those who are equipped with a computer without a “modern” graphics card unable to encode in H.265 to still be able to transmit with this H265 “compression”.<\/p>\n

In this article, and as usual, we will go step by step through all the operations described as precisely as possible. This article is “multi-page”, to browse from one page to another or directly from the contents page to the desired page.<\/em><\/p>\n

<\/p>\n

Why switch to H.265?<\/h2>\n

In the previous article, I had the opportunity to explain that the digital rate transmitted to the transmitter is dependent on the characteristics of the radio signal that will be transmitted: Mainly its spectral width (or the number of kilo symbols) and the correction factor (FEC). If this doesn’t tell you much, I invite you to (re)read this article to clarify these important notions in DATV.<\/p>\n

H.265 encoding (or MPEG-4 HEVC for High Efficiency Video Coding) is a much more powerful video encoding and compression process than H.264. Thanks to its algorithm that increases the static areas in the image and “tightens” the compression mesh, the H.265 encoder is able to save up to 70-80% bandwidth for the same quality as H.264 encoding.<\/p>\n

\"\"<\/a><\/p>\n

On the image above, we can see that there are globally less squares on the right image, encoded in H.265 than on the left image. It is this economy of uniform areas that increases the data rate useful for transmitting an image. On the other hand, if we consider that we want to use the entire available bit rate, we will then be able to improve image quality, by avoiding blurring during rapid image movement, or else be able to increase the definition of the video sent.<\/p>\n

On the other hand, H.265 encoding is only available on some recent graphics cards. Some third-generation Nvidia cards integrate an NVENC H.265 encoder (NVIDIA’s encoder). Refer to the GPU manufacturer’s list<\/a> to know if your GPU integrates this H.265 encoding technology. For those who don’t, there are boxes on the market that encode a video input to an Ethernet network “output”.<\/p>\n

There are several models on the market. We will focus on a model that is widely available and whose price remains correct: ON-DMI-16D (1080P@50fps) or ON-DM1-16A (1080p@60fps). Here are the manufacturer’s specifications.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\n

H.265\/H.264 HDMI Video Encoder<\/strong><\/h3>\n<\/td>\n<\/tr>\n

Basic<\/td>\nInformation<\/td>\n\u00a0\u00a0 Username\uff1aadmin;\u00a0 Password\uff1a12345\uff1b IP\uff1a192.168.1.120<\/td>\n<\/tr>\n
Model<\/td>\n\u00a0 ON-DMI-16D\u00a0 \u00a0or\u00a0 \u00a0 ON-DMI-16A<\/td>\n<\/tr>\n
Chipset<\/td>\n\u00a0 Hi3516D (1080p@50fps) or Hi3516A (1080p@60fps)<\/td>\n<\/tr>\n
Video\/Audio
\nCompression<\/td>\n		Video Encoding<\/td>\n\u00a0 H.265\/H.264 Encoding<\/td>\n<\/tr>\n
Audio<\/td>\n\u00a0 AAC, G.711U, G.711A;\u00a0 Sample: 48000kHz\uff1bG.711U\/A for NVR<\/td>\n<\/tr>\n
Audio sampling<\/td>\n\u00a0 32K, 48K, 64K, 128K or 8000HZ(for NVR)<\/td>\n<\/tr>\n
Bitrate<\/td>\n\u00a0 CBR\/VBR\uff1b 64kbps-12Mbps(adjustable)<\/td>\n<\/tr>\n
Frame rate<\/td>\n\u00a0 1-30fps (adjustable)<\/td>\n<\/tr>\n
Bitrate<\/td>\n\u00a0 Main Stream\uff1a1920*1080, 1600*900, 1440*1050, 1280*1024, 1280*800, 1280*720\uff1b
\nSub Stream\uff1a1280*720\uff1b800*600, 720*576, 640*480, 640*352, 352*288, 320*240<\/td>\n<\/tr>\n
Video Stream<\/td>\nUDP<\/td>\n\u00a0 udp:\/\/@224.1.2.3:10000<\/td>\n<\/tr>\n
TS stream<\/td>\n\u00a0 http:\/\/192.168.1.120:80\/ts\/0(main stream)
\nhttp:\/\/192.168.1.120:80\/ts\/1(sub stream)<\/td>\n<\/tr>\n
RTSP<\/td>\n\u00a0 rtsp:\/\/192.168.1.120:554\/live\/0(main stream)
\nrtsp:\/\/192.168.1.120:554\/live\/1(sub stream)<\/td>\n<\/tr>\n
Network
\nProtocols<\/td>\n		Protocols<\/td>\n\u00a0 TCP\/IP, UDP, RTSP, ONVIF, HTTP, DNS, RTMP, TS stream, DHCP<\/td>\n<\/tr>\n
WI-FI Protocols<\/td>\n\u00a0 Support 802.11b\/g\/n, WEP, WPA, WPA2 Encrypted Protocol<\/td>\n<\/tr>\n
Private Protocols<\/td>\n\u00a0 Hikvision and DaHua Private Protocols<\/td>\n<\/tr>\n
Interfaces<\/td>\nNetwork Port<\/td>\n\u00a0 RJ45 10M \/ 100M Adaptive Ethernet Interface<\/td>\n<\/tr>\n
HDMI<\/td>\n\u00a0 1CH HDMI Input<\/td>\n<\/tr>\n
Reset<\/td>\n\u00a0 Support<\/td>\n<\/tr>\n
Others<\/td>\nOperating Environment<\/td>\n\u00a0 Temperature: -10\u2103~+55\u2103; Humidity: <95%<\/td>\n<\/tr>\n
Server<\/td>\n\u00a0 Support Baidu Cloud, Youtube, Wowza and other streaming media servers<\/td>\n<\/tr>\n
NVR Compatibility<\/td>\n\u00a0 Support H.265 NVR from Hikvision and DaHua\u3010Audio:G.711U\u3011<\/td>\n<\/tr>\n
CMS Client<\/td>\n\u00a0 Support Hikvision (iVMS-4200\/8700) and DaHua (SmartPSS)<\/td>\n<\/tr>\n
Power Supply<\/td>\n\u00a0 DC 12V\/1A<\/td>\n<\/tr>\n
Consumption<\/td>\n\u00a0 \u22643W<\/td>\n<\/tr>\n
Dimension<\/td>\n\u00a0 115(L) * 70(W) * 33(H)mm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Here is the encoder manual to download: H.265 HDMI Video Encoder Quick Start Guide_ERV1.2.pdf<\/a><\/p>\n

\"\"<\/a>\"\"<\/p>\n

<\/p>\n

External encoder architecture with Adalm Pluto<\/h2>\n

The case is to be considered as a screen or a video projector that would be connected to your computer. Except that in our case, the encoder does not display an image but encodes the video and audio to send it via a network to a receiver\/diffuser, a receiver which in our case is the Adalm Pluto with the firmware PlutoDVB. The H.264\/H.265 encoder has an HDMI connector through which we will send the video and audio. It is advisable to use the RJ45 cable to connect the box to the network rather to the wifi network, which is more prone to disturbance.<\/p>\n

It is therefore also assumed that you have also connected your Adalm Pluto on an Ethernet network (see my previous article to perform this operation).
\n\"\"<\/a><\/p>\n

Where to buy this H.265 encoder ?<\/h2>\n

You can find this encoder at various retailers, usually shipped from China.<\/p>\n