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DDMALL DD2KW User Manual

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DD2KW User Manual
V1.0(Update Time: 2025-04-17)
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Summary of Contents for DDMALL DD2KW

  • Page 1 DD2KW User Manual V1.0(Update Time: 2025-04-17)

  • Page 2: Table Of Contents

    9. Decoding Settings ............15 9.1 Log in to the Decoder Web UI ........... 15 9.1.1 Log in to the DD2KW Web UI in AP Mode ......15 9.1.2 Log in to the DD2KW Web UI in Client Mode ......15 9.2 Status Page ............
  • Page 3 10.1 The SSID of the DD2KW Cannot Be Found ........ 47 10.2 Cannot Log in to the DD2KW Web UI ........48 10.3 The Monitor Screen Displays“Decoder is ready，waiting to establish a network connection” ............. 50 10.4 The Monitor Screen that the DD2KW Connected is Black ....50...

  • Page 4: Introduction

    1. Introduction The DD2KW is a mini and professional high-definition HDMI video decoder with built-in 2.4G+5G dual-band Wi-Fi antenna for wireless AV transmissions through Wi-Fi network or mobile hotspot. With H.264/H.265 compression, it supports the decoding of IP streams with protocols such as Onvif, RTSP, UDP, TCP, and SRT. It decodes and converts high-definition IP signals from IP cameras, encoders, NVRs, and other IP video sources into high-definition HDMI AV signal for output.

  • Page 5: Parameters

    3. Parameters 3.1 General Power Supply 5V/1A （Micro USB-Powered） Power Consumption 2.6W Work Temperature -10~50℃ （14~122℉） Storage Temperature -20~85℃ （-4~185℉） Work Humidity 10%-90%RH (Non-condensing) Weight Dimensions 75mm(L)*32mm(W)*15mm(H) MTBF 30,000h Table 1 3.2 Video Parameters HDMI Standard HDMI1.4 Supported Output Resolution 1920×1080P@60/50/30/25/24Hz 1920×1080i@60/50Hz 1280×720P@60/50...

  • Page 6: System Parameters

    SRT，RTSP，ONVIF，UDP Wi-Fi Standard 802.11a/n/ac 5G，802.11b/g/n 2.4G Control Method Web UI Hotspot SSID in AP Mode SSID: DD2KW; Password: 12345678 Default IP in AP Mode 192.168.2.250 WEB UI Login Credential Default username/password: admin/admin Table 3 Note: Specifications are subject to change without notice.

  • Page 7: Device Appearance Introduction

    Reset Factory Settings: Indictor flashes in red and green alternately. Table 5 5.2 Device Set Button 5.2.1 Switch Work Mode The DD2KW has two work modes: AP (Access Point) mode and Client mode. In AP mode, the DD2KW works as Wi-Fi AP device, providing web service with built-in ...

  • Page 8: Reset Factory Settings

    Internet, and performs AV decoding and output with preset protocol and parameters. 1. By default, the DD2KW is in AP mode. Long press the set button for about 3s until the indicator lights up in red to switch the device to Client mode. The decoder indictor will light up in green after it connects the mobile hotspot or Wi-Fi successfully (if the decoder doesn’t connect the mobile hotspot or Wi-Fi successfully, the indicator will be in solid...

  • Page 9: Typical Application Setup Diagram

    5. Open the browser of the control terminal like mobile phone, laptop, and tablet, type “192.168.2.250” (the default IP address of the DD2KW in AP mode) to log in to the web UI of the decoder for Networking settings. Users need to add the mobile hotspot or Wi-Fi SSID to...

  • Page 10: Network Settings

    UI in AP mode to do network settings, and then switch the decoder to Client mode for AV decoding. 1. The DD2KW indictor flashes in yellow in AP mode. If the decoder is not in AP mode, please long press the set button for about 3s until the indicator flashes in yellow to switch the decoder to AP mode.
  • Page 11 3. Open the browser of the mobile phone or laptop, type “192.168.2.250” (the default IP of the DD2KW in AP mode) to load the login page of the decoder. Enter the default username and password (admin/admin) to log in to the web UI of the DD2KW.
  • Page 12 4. Click the “Network” icon on the left menu to enter the Network setting page. On the Network/Client page, users can add the mobile hotspot or Wi-Fi router that the DD2KW needs to connect for working in Client mode. And users can set the IP parameters for the...
  • Page 13 Picture 6 1） Network Name（SSID）: The mobile hotspot or Wi-Fi router SSID that the DD2KW need to connect in Client mode. 5G network is preferred. Users can manually enter the hotspot or router SSID, or select the wanted SSID in the ...
  • Page 14 Client IP address assigned to the DD2KW; or you can switch the DD2KW back to AP mode, and log in to the web UI to see the Client IP address on the Network page.

  • Page 15: Decoding Settings

    1. Make sure the DD2KW is in Client mode, and it has connected to the hotspot or router Wi-Fi properly (the device indicator is in solid green). 2. Make sure the mobile phone or laptop is in the same LAN as the DD2KW, and IP address is in the same network segment as the DD2KW Client IP.

  • Page 16: Status Page

    (normally it is the DD2KW connected Wi-Fi router) to see the IP address of the DD2KW assigned by the router; or you can switch the DD2KW back to AP mode, and log in to the decoder web UI and see the Client IP on the Network page.

  • Page 17: Output Settings

    ① Whether the IP cameras/encoders/network stream servers etc. are in the same LAN as the DD2KW, and the IP addresses are in the same network segment. ② Whether the Source settings of the DD2KW are correct? Such as the protocol, ULR address, Port etc. DD2KW 3.

  • Page 18: Source Settings

    The DD2KW supports output in 1920*1080p@60/50/30/25/24Hz, 1920*1080i@60/50Hz, and 1280*720p@60/50Hz. 2. Audio Volume You can adjust the DD2KW output volume, as well as adjust the output volumes for the HDMI output and Analog output. 9.4 Source Settings Click the Source widget on the left menu to enter the Source page, where you can add the IP stream sources for decoding.

  • Page 19: Add Stsp Stream Source

    Picture 9 9.4.1 Add STSP Stream Source 1. Click Add button, and the web page will prompt a conversation window to add the source. 2. Stream Protocol: Select RTSP. 3. Channel: The sequence number of the streams. It is automatically assigned regarding the sequence it is added.
  • Page 20 9. Go back to the Source page, and you can see the new added IP stream in the Source List. You can click the buttons under the Operation section to control the corresponding stream. Click , and the DD2KW will decode the corresponding IP stream and output to  display terminal for display. Click , and the DD2KWwill stop decoding and play the stream.

  • Page 21: Add Onvif Stream Source

    Picture 11 9.4.2 Add ONVIF Stream Source 1. Click “Add” button, and the web page will prompt a conversation window to add the source. 2. Stream Protocol: Select ONVIF. 3. Channel: The sequence number of the streams, it is automatically assigned regarding the sequence it is added.
  • Page 22 9. Go back to the Source page, and you can see the new added IP stream in the Source List. You can click the buttons under the Operation section to control the corresponding stream. Click , and the DD2KW will decode the current stream and output the video to  connected display terminal for display. Click , and the DD2KWwill stop decoding and play the stream.

  • Page 23: Add Udp Stream Source

    Picture 13 9.4.3 Add UDP Stream Source In this part, we will use DDMALL HEV-4K encoder as the UDP stream source for illustration. If you use other encoders or encoding software, you can refer to this setting method. UDP Multicast Mode 1.
  • Page 24 Picture 14 2. Go back to the DD2KW web UI/Source page, and click “Add” button to add the stream source. 3. Stream Protocol: Select UDP. 4. Channel: The sequence number of the streams. It is automatically assigned regarding the sequence it is added.
  • Page 25 10. Go back to the Source page, and you can find the new added IP stream in the Stream Source list. Click the buttons under the Operation section to control the stream. Click , and the DD2KW will decode the current stream and output the video to  connected display terminal for display.
  • Page 26 1. Go to the HEV-4K web UI and set the UDP unicast on Misc Stream page, including: set the Destination IP as 192.168.1.250 (the DD2KW IP address), set the Port number as 21000 (the range is 21000 to 22000), and set the TTL as 64 (the range is 0 to 255). Click Start...
  • Page 27 Picture 17 2. Go back to the DD2KW web UI and turn to Source page. Click Add button, and the web will prompt a conversation window to add the stream source. 3. Stream Protocol: Select UDP. 4. Channel: The sequence number of the stream. It is automatically assigned regarding the sequence it is added.
  • Page 28 9. Go back to the Source page, and you can review the new added stream in the Source list. Click the buttons under the Operation section to control the stream. Click , and the DD2KW will decode the current stream and output the video to  connected display terminal for display.

  • Page 29: Add Srt Stream Source

    SRT has three modes: Caller, Listener and Rendezvous. You can set up SRT session for video transmission based on any of the three modes. Here we would like to use DDMALL encoder HEV-4K and decoder DD2KW as example to introduce how to set up SRT session for video transmission.
  • Page 30 Table 6 Set the Decoder to SRT Caller 1. Log in the web UI of the DD2KW, and click Add button on the Source page. The web UI will prompt a stream source adding window. 2. Stream Protocol: Select SRT.
  • Page 31 for the encryption. Only when the encoder uses the same encryption format and password, can the video transmission be performed. If you choose not to encrypt the SRT session, select None. Here for example, we select None. 11. Bandwidth Overhead: Recommend to use the default proportion 25%; the proportion is higher, the more stable the SRT transmission is, but the bigger bandwidth will it take.
  • Page 32 4) Latency: Set it to 120, which is the same value as the Latency of the decoder. 5) Encryption: Set it to None. As the DD2KW is set to none, so we set the same here (If the decoder uses encryption, then here you need to use the same encryption format and password here).
  • Page 33 Picture 21 15. Go back to the DD2KW web UI, and you can see the new added SRT-Caller stream on the Source list. Click the buttons under the Operation section to control the stream. Click , and the DD2KW will decode the stream and output to the connected...
  • Page 34  Picture 22 Set the decoder to SRT Listener 1. Log in to the DD2KW web UI, and click Add button on the Source page. The web will prompt a source adding window. 2. Stream Protocol: Select SRT. 3. Channel: The sequence number of the stream. It is automatically assigned regarding the sequence it is added.
  • Page 35 6. Source Port: Set it to the same value as the Destination Port of the Caller device. Here for example we set it as 4201. 7. Latency: The video transmission buffering time. By default, it is 120ms with modification range 0-5000. Recommend to use the default value. 8.
  • Page 36 6) Latency: Set it to 120, which is same as the Latency value of the decoder. 7) Encryption: Set it to None. As the decoder DD2KW is set to None, so we same the same here (if the decoder is set to encrypt the SRT transmission, the encoder must use the same encryption format and password for SRT transmission).
  • Page 37 9) Payload Size: Set it to 1316, which is same as the decoder value. 10) Click Start after all parameter settings are done for AV transmission. Picture 24 13. Go back to the DD2KW web UI, and you can see the new added SRT-Listener stream...
  • Page 38  Picture 25 Set the Decoder to SRT Rendezvous Mode 1. Log in to the decoder DD2KW web UI, and click Add button on the Source page. The web will prompt a source adding window. 2. Stream Protocol: Select SRT.
  • Page 39 4. Name: You can customize a name for the stream. For example: SRT-Rendezvous. 5. Mode: Select Rendezvous. 6. Destination Address: The format is srt://the encoder’s IP address. Here for example we enter: srt://192.168.1.251. 7. Destination Port: in Rendezvous mode, the encoder and decoder use the same Destination Port.
  • Page 40 6) Latency: Set it to 120, which is same as the Latency value of the decoder. 7) Encryption: Set it to None. As the DD2KW is set to None, we select None here (If the decoder encrypts the SRT transmission, the encoder must use the same encryption format...
  • Page 41 and password for video transmission). 8) Bandwidth Overhead: Set it to 25%, which is same as the decoder value. 9) Payload Size: Set it to 1316, which is same as the decoder value. 10) Click Start after all parameter settings are done for AV transmission. Picture 27...

  • Page 42: Network Settings

    15. Go back to the decoder DD2KW web UI, and you can see the new added SRT-Rendezvous stream on the Source list. Click the buttons under the Operation section to control the stream. Click , and the DD2KW will decode the stream and output to the connected ...

  • Page 43: Network/Client

    DD2KW needs to connect in Client mode, and you can set the DD2KW Client IP. Picture 29 1. Network Name (SSID): It is the SSID of the hotspot or Wi-Fi router that the DD2KW needs to connect in Client mode for working. 5G network is preferred.

  • Page 44: Network/Access Point

    IP assigned to the DD2KW; or you can switch the DD2KW back to AP mode, and then log in to the web UI of the DD2KW to see the assigned Client IP on the Network page.

  • Page 45: System Settings

    2. Password: The password of the DD2KW when it works as a hotspot in AP mode. By default, it is 12345678, and you can edit it accordingly. 3. Wireless Band: The band of the DD2KW when it works as a hotspot in AP mode. You can select 5G or 2.4G. By default, it is 2.4G.

  • Page 46: System/Device Info

    Restore: Remain the Network settings, and reset other settings to factory default values. Reset: Reset the device to factory settings. 9.6.2 System/User configure On the User Configure page, you can edit the login credentials for the DD2KW. Recommend to edit the username and password to avoid unauthorized login to your device.

  • Page 47: Frequently Asked Questions

    10.1 The SSID of the DD2KW Cannot Be Found When the DD2KW is in AP mode, it works as a Wi-Fi AP mode to provide web service with built-in web UI. You can use the laptop, mobile phone or tablet to connect the DD2KW...

  • Page 48: Cannot Log In To The Dd2Kw Web Ui

    10.2 Cannot Log in to the DD2KW Web UI When the DD2KW is in AP mode or Client mode, you can log in to its web UI for parameter settings through mobile phone, tablet, or laptop etc. But the network connection methods between the control terminal and DD2KW are different in the two modes, and IP addresses for login are also differently.
  • Page 49 (such as the router the DD2KW connected) to see the IP assigned to the DD2KW; or you can switch the DD2KW to AP mode, and log in to its web UI to see the Client IP on the Network page.

  • Page 50: The Monitor Screen Displays"Decoder Is Ready，Waiting To Establish A Network

    The indictor is in solid red means the DD2KW is in Client mode, but it hasn’t connected to the hotspot or Wi-Fi router. 1) Switch the DD2KW to AP mode (press the set button for about 3s until the indicator flashes in yellow), and use the control terminal (mobile phone, tablet, laptop etc.) to...
  • Page 51 4. Please check what is the DD2KW’s output resolution, and if the resolution is within the supported range of the monitor. You can log in to the web UI of the DD2KW, on the Output page, you can see and edit the DD2KW output resolution.

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