HDMI To IP encoder modulator CVBS H.265 H.264 encoding board PCBA Ethernet RTSP UDP for UAV Drone Robotic

Introduction

There are many HDMI encoding boards on the market. Have you met these problems?

1. The delay is too long
2. The encoding format cannot be customized
3. UART AT remote control or operation cannot be used.
4. Can not support HDMI and CVBS dual video input encoding

This encoder board supports HDMI, SDI, CVBS video input, and IP ethernet RJ45 living stream output, most applications are for wireless video transmitters, which can encode the HDMI or CVBS video signal to the digital living stream by H.264 or H.265, and transfer it to the receiver, CVBS to IP converter.

The HDMI and Composite CVBS video to IP ethernet stream encoder modulator module board parameter can be configured by UART software modification. Please contact us if you need to customize a similar function to meet your project.

Advantage:

Ultra-Low Latency

H265 or H264 support

HDMI and CVBS Dual Encoding

Two Audio inputs can switch

Web UI or serial port UART AT command configuration management

• Ultra-low latency H.265/H.264 audio and video encoding maximum support 1080P60 real-time video capture and encoding
• The HDMI or AV input is encoded and outputted to a wireless module through the Ethernet port. The video encoding bit rate can be adjusted dynamically.
• Support audio input and audio decoding output. (Remote operate by UART AT command choose HDMI or CVBS audio)
• You can choose between HDMI or AV encoding for two videos with the option to control the input source using an AT command.

Feature

The board implements H.265/H.264 audio and video compression encoding, supports up to 1080P@60fps encoding, and is backward compatible with other resolutions and frame rate encoding.

Audio and video input

• HDMI interface(audio+video):1080 60P,1080 50P,1080 30P,1080 25P,1080 60I,1080 50I, 720 60P,720 50P,720 30P, …, various modes adaptive (1080p, 1080i, 720p, 1024×768, 1280×1024);
• AV in the interface (audio + video):720×480 60I(NTSC),720×576 50I(PAL), mode adaptive. through the AV interface, it can be Line in Mic in.
• The default audio input is the same as the video input interface.
• The audio input interface can also be configured through the Web UI when the serial port detects audio.
• The audio and video source signals are encoded, and the audio and video source acquisition interface can also be configured through the configuration serial port.
• The audio and video source acquisition interface can be dynamically switched through serial port commands during system operation.
  Video encoding: H.265 or H.264 format, the encoding bit rate can be configured.
  Audio encoding: AAC encoding.
• By programming special firmware HDMI+AV the simultaneous capture and encoding of board Audio output(Audio out)
• The board has a built-in audio decoding output function(Line out), which can be connected to an external headphone or audio power amplifier. Audio is decoded and played.

Ethernet port (Ethernet interface)
supports our two-way wireless transmission modulator module, or other third-party two-way links.

Wireless transmission interface( FPC Main interface)
can be connected to our COFDM wireless transmission module, and can also be connected to our two-way wireless transmission link module.

Data-UART
TTL 3.3V level, parameters such as transmission baud rate can be configured. When the board is through a wireless link, the data serial port is used for transparent data transmission.

Control-UART
TTL 3.3V level, which can be connected to our parameter configuration panel or another upper computer to configure the encoding board system.

USB Host interface
software upgrade and maintenance. (optional USB recorder function)

Power supply voltage
supports the reverse connection protection of the power input, and supports the power input range of 7~30V. Provides a 5V power output interface. The maximum working power consumption is 2.4W (1080P60 H.265 encoding), and the maximum current is 200mA.

Indicator
power indicator, video encoding work indicator.

The HDMI to IP encoder board size is 70x45x1.2mm (LWH)

The height of the back component is less than 2.5mm, and the height of the front component is less than 6.8mm.

Board weight
20.6 grams.

Interface Signal

• AL (Audio in left), audio input left channel;
• AR(Audio in right), audio input right channel;
• GND, signal ground;
• AV, analog video input. (Please ignore the color of the wiring, make sure the fourth jack is CVBS Composite video input.)

USB interface:4PIN 1.25mm pitch socket, used for the encoder board software upgrade and maintenance.

Audio-out interface:2PIN 1.25mm pitch socket, the board has a built-in audio decoding output function(Line out), which can be connected to an external headphone or audio power amplifier. Decode and play the audio input from the network port.

Ethernet: Ethernet interface,4PIN 1.25mm pitch socket

Application

1. Done or UAV video encoding
2. Robotic or mini-control vehicle
3. Unmanned Vehicles UAV
4. Unmanned Submarine
5. The HDMI to IP board can be COFDM modulation module RCB stacked and assembled with a COFDM one-way transmission module. The connection interface is FPC Main (26PIN flat cable flexible cable interface). HDMI+AV encoder + COFDM Transmitter Module
6. The HDMI to IP encoder board PCBA is connected to a two-way wireless link through the network port. At this time, the operating parameters can be configured through the network port Web UI. For example, set the video encoding bit rate, H264/H265 encoding method, audio input method, serial port baud rate, etc.
7. The board can be connected to the Control-UART parameter configuration panel to set operating parameters.

1. HDMI interface version: HDMI V1.4
2. Ethernet Output Data rate: 100MBps
3. Operating Temperature range: -40~85 degrees
4. Compatible Operating System: Embedded Linux

Web UI management Parameter setting

1. What is the default IP address of this HDMI to IP encoder?

This HDMI video to IP encoding board can view the current parameter configuration through the network port Web UI and modify it according to application needs. through the network port browser http://192.168.1.30/ (the IP address of the encoding board)

2. How to check the possible problem if the encoder output is not working?

1. Please check the Web UI from the browser, at the below picture, if the video source input is ok, then it will show the CVBS or HDMI at the red arrow.

2. Please check the HDMI encoding board LED light is blink or not.
If it is green and blink, then the video input source is working well, if not blink, then please check the video input source is ok or not.

3. How can I modify the compression bitrate?

The encoding bitrate can be configured. The default web server is set to 0.0 to represent auto (3.12Mbps will be used internally). Customers can modify this value. For example, it is possible to configure 1Mbps~2Mbps or even lower.

4. How to set the GOP？

GOP is required to be set to an integer multiple of the encoding frame rate (note that it is the encoding frame rate):

1. For example, if the camera inputs 1080p60, then the gop is set to 60/120/180 (it is not recommended to set too large)

2. For example, if the camera inputs 1080p25, the gop is set to 25/50/75 (it is not recommended to set too large)

3. For example, the camera input 1080i60, due to the need for de-interleaving, all the actual encoding is 1080p30, then the gop is set to 30/60/90

If your video source is CVBS, CVBS has two systems, PAL is 25fps, NTSC is 30fps

if your CVBS is PAL, then GOP set is 25/50/75, if your CVBS is NTSC, then GOP set is 30/60/90.

The larger the gop setting, the better the image quality, but the size difference between the I frame and the P frame becomes larger, resulting in the following disadvantages:
1. Large I-frames are prone to frame loss due to wireless transmission;
2. If the gop setting is large, the loss of the I frame will lead to a longer recovery time after the blurred screen;
3. The size difference between I frame and P frame is large, which will increase the transmission delay.

gop要求设置为编码帧率的整数倍(注意是编码帧率)：
1、比如相机输入1080p60，那gop设置为60/120/180(不建议设置太大)
2、比如相机输入1080p25，那gop设置为25/50/75(不建议设置太大)
3、比如相机输入1080i60，由于需要去交织，所有实际编码是1080p30，那gop设置为30/60/90
从上面可以看到，由于输入相机帧率不确定，所以我们一般建议配置0(Auto)
cvbs分制式，pal是25fps，ntsc是30fps
假设是pal，那gop设置25/50/75

gop设置越大，画质越好，但是I帧和P帧的大小差别变大，产生一下缺点：
1、大的I帧容易因为无线传输的原因导致丢帧花屏；
2、gop设置大，I帧丢失导致花屏后恢复时间变长；
3、I帧和P帧大小差别大，会增加传输延迟

5. Where can I download the UDP player? We recommend Splayer_v4.2_2020.6.6 which we use frequently.

Please download at the below link.

Splayer_v4.2_2020.6.6

https://drive.google.com/file/d/1ihzUhfnx2Wo3zLO8UAs1aUQeLswonJD-/view?usp=sharing

Splayer_v4.3_2022.10.22

https://drive.google.com/file/d/1PQc-LZ55qGnjeMsjkHYSloHfY3NEUsGH/view?usp=drive_link

6. Is mpeg-2 TS over UDP supported? Instead of RSTP, i need MPEG-2 Transport stream.

1. We can modify the TS stream over UDP, but the TS stream is a non-standard TS stream that we have modified, which needs to be interpreted by our decoder board or special player (Download).
2. If you agree with the RTSP protocol, VLC can play it; if you only agree with the TS stream (due to our non-standard modification), VLC cannot decode and play it, so we must use our special player. (Download).
3. If you want to switch to the standard MPEG-2 TS stream to play with VLC, our software engineer can customize the firmware for you (this will take a few days) for an additional fee of USD500.
4. We use non-standard mpeg-2 ts streams primarily for the following reasons:
   1. The standard mpeg-2 ts stream has too much overhead outside the effective data, making it unsuitable for use with cofdm;
   2. The standard mpeg-2 ts stream is difficult to implement the aes encryption function;
   3. The standard mpeg-2 ts stream is difficult to achieve serial port transparent transmission (used with our decoder board)
5. If you don't need our decoder board, encryption and serial port transparent transmission, it is also possible to use standard mpeg-2 ts stream
6. It is recommended that you try our player; in real-time performance, our player outperforms vlc.
   The vlc player's algorithm does not take into account real-time performance; instead, it will constantly adjust its cache (only increase but not shrink). As a result, the longer it is played, the longer the delay may be (especially when used with a wireless link)

7. Do you have any SSL certification or code signing certification to protect your HDMI AV encoder board?

1. SSL certificate is HTTPS protocol, our products do not support it now, only HTTP.
2. The default encoder board through the RTSP protocol, RTSP is not encrypted. You can set a longer password. And change it frequently.
3. If you want to encrypt, you need to use a pair of our codec boards (with encoder and decoder board as TX and RX), with UDP protocol, and they are using aes256 encryption. (Just like the bank level.)

8. Do you offer customized firmware for me?

Yes, Sure, please contact us. Let me list your demand at the below.

1. We need to take a composite analog PAL video signal and transmit it using h264 over MPEG2 TS. OK
2. The output must be playable through VLC. OK
3. UPD://@1030. OK
4. The output network stream packet should be 188 bytes standard mpeg2 TS. OK
5. Compression scheme is h. 264, CVBS PAL input and IP output. OK

How to upgrade the firmware of the CVBS PAL Analog or HDMI video input encoder board IP RJ45 ethernet output?

9. Would you offer me the COFDM UART AT commands?

Sure

Please check the below link

COFDM UART AT command for the transmitter and Receiver.

Or

Download the COFDM Transmitter UART AT command PDF.

COFDM Receiver UART AT command PDF.

10. Can you make the PCB size to 40x40mm?

Thanks.

Only CVBS composite video input, we once designed and produced 42x37mm, CVBS composite video source to IP encoder board. (No HDMI input)

If both CVBS and HDMI video input, we can not make it smaller. Except that you allow the use of two PCB boards stacked.

11. What should I do if I can't ping the encoder board from my computer?

Please follow the checkpoints below to confirm.

1. After connecting the encoder board with your computer by ethernet cable, the LED of RJ45 connector should be blinking or not. (to check the ethernet connection is ok or not)
2. Is your computer configured with 192.168.1.x network segment ip?
3. Have you modified the default IP address of the encoding board? If the IP address changed, maybe you can download and use the below software to find what IP address now.
   https://www.advanced-ip-scanner.com/
4. Or Directly connect the UART cable of the encoding board to the computer, and use the serial port debugging assistant to send the ATGIP_ command.get ip address command Operation Video at Youtube
   

   Format	ATGIP_ Example: ATGIP_
   Parameter	No
   Use	to query the current IP address of the receiving end
   Return value	Example: ATGIP_ ATGIP192.168.0.215 OK
   Remark	query command

5. More COFDM UART AT commands, please check this link. https://ivcan.com/encoder-modulator-decoder-demodulator-module-parameter/

12. Is it possible to control/modify DNR, Sharpness, Contrast, White Balance, and so on?

These parameters are determined by the camera, only the sensor has it.

One more question: In the future is there any possibility to incorporate these features in the output side of encoder (if we get volume orders) ?

Our Answer: These are the parameters of the isp, and our current encoding boards are all bypass isp (because we don't connect the sensor, we don't need and can't use the isp), so we can't add these parameters.

13. Does the composite video input support both PAL and NTSC standards?

Yes, CVBS input support NTSC and PAL, Automatic detection and adaptation

14. Should I buy the extra parameter configuration board tool for this HDMI / CVBS to IP encoder?

1. The parameter configuration board tool is mainly used for the COFDM module function. If you buy this HDMI / CVBS to IP encoder Vcan1746 separately, you don’t need to buy a parameter configuration board tool, you can adjust the parameters through the Web UI.
2. Of course, if you want to use the parameter configuration board tool to adjust some parameters of the encoder board, it is also possible.
3. For example, the video encoding bit rate can be configured through the Web UI or changed through the extra parameter configuration board tool. The Web UI can configure all the parameters, and the parameter configuration board tool can only adjust some of them.

15. Please send me Electrical Diagram to find where to find short circuit

Ok, please check the below link

Vcan1746 HDMI CVBS Encoder Board Module Diagram

16. Do this encoder module board has recorder function via USB or TF card?

Yes, if you need, we can offer you the special firmware to have USB recorder function.

Question: Does your USB DVR support playback on the encoded video?

Answer: No, The USB has the record function. You need to play it on a computer, it can not playback on the encoder board directly.

17. We will use it with two inputs (HDMI and PAL) and with 12V, Can you confirm it's working?

1. Do you mean HDMI or AV input, or do you need HDMI and AV to support two simultaneous inputs?
2. Currently it supports either HDMI or AV input.
3. Vcan1746 can only choose one of HDMI/AV at present, other boards can meet the firmware you need, but this board only supports SDI + AV/AHD output.
4. If necessary, you can evaluate the board with SDI + AV/AHD input to see if it meets your requirements. If yes, our HDMI + AV input Vcan1746 can be made the same later.
5. If you really need to evaluate the HDMI + AV interface, please first buy Vcan746 and burn the default shipping firmware for testing. HDMI and AV can be selected for use. If there is a certain amount of follow-up orders, we can develop a special firmware to support HDMI+AV input at the same time.
6. The display of HDMI and CVBS video input by two channels at the same time is similar to Hikvision IPC, which is divided into main bit rate and sub bit stream. The main stream corresponds to HDMI, and the sub stream corresponds to CVBS.
7. Now we can develop a new firmware to support HDMI and CVBS to live streaming at the same time, but the audio can only be selected from one of the two (the system selects HDMI audio/analog audio according to the video access situation).

More FAQ

Video Encoder and Decoder FAQ

HS Code

8517629900, Some of our customers use this HS code for your reference.

Special Function Custom Development

1. HDMI and CVBS Dual Video Encoding

2. USB has a video recording function.

3. Special handling of encoding formats to match your custom decoder board

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