Blackmagic Design - Blackmagic Streaming Decoder 4K

Blackmagic Streaming Decoder 4K is a professional device designed to take compressed H.264 and H.265 video streams from Blackmagic encoders, ATEM switchers or Blackmagic cameras and convert them back to SDI and HDMI video. It supports RTMP and SRT so you can receive streams from multiple streaming platforms and ensure secure, reliable transmission.

This decoder supports point-to-point streaming so you can receive video signals from a remote encoder and convert them for local distribution. It also supports Blackmagic Cloud Streaming so you can receive streams directly from the Blackmagic cloud network. It also features a 12G-SDI reference input so you can connect Tally, camera control and Talkback signals so you can have two-way communication between the decoder and your cameras.

Blackmagic Streaming Decoder 4K features SDI and HDMI outputs so you can connect to professional monitors, switchers or other video production equipment. Like the encoder, it features a 2.2" color LCD display, which allows you to monitor the status of the video stream and quickly access the device settings.

It is designed to be easily integrated into professional racks, thanks to its compact 1/3 rack format, which allows multiple units to be mounted in a small space. It also includes a redundant power supply with support for AC and DC power, ensuring continuous operation even in the event of failures.

User benefits

• Multiple resolutions supported: HD, Ultra HD and 4K DCI
• Efficient decoding thanks to H.264 and H.265 protocols
• Direct reception from remote encoders without loss of quality
• Sends Talkback, camera control and Tally signals to the camera

Application areas

• Broadcast applications, to receive and decode high-quality content on professional infrastructures
• Conferences
• Distribution of high-quality video content for webinars, presentations and corporate communications
• Distributed productions
• Conversion of signals for professional centralized control rooms 
• Mobile studios

Technical characteristics

Connections

• SDI reference inputs: 1
• SDI video outputs: 1
• SDI reference outputs: 1
• SDI rates: 1.5G, 3G, 6G, 12G
• HDMI 2.0 video outputs: 1
• Live stream audio inputs / outputs: 2 channels embedded live stream audio on output, 2 channels embedded Program audio on input, 2 channels embedded Talkback audio on input   
• SDI audio inputs: 16 channels embedded audio on 12G-SDI Ref IN
• SDI audio outputs: 16 channels embedded audio on 12G-SDI Ref OUT, 2 channels embedded audio on 12G-SDI OUT
• HDMI audio outputs: 8 channels embedded audio on monitor out
• Webcam output: 1 x USB-C up to 2160p 60
• Ethernet: supports 10/100/1000 BASE-T for live streaming, configuration, and software updates

Video standards

• HD video input standards: 720p 50, 720p 59.94, 720p 60, 1080i50, 1080i59.94, 1080i60, 1080p 23.98, 1080p 24, 1080p 25, 1080p 29.97, 1080p 30, 1080p 50, 1080p 59.94, 1080p 60, 1080P sF23.98, 1080P sF24, 1080P sF25, 1080P sF29.97, 1080P sF30
• 2K video standards: 2Kp 23.98 DCI, 2Kp 24 DCI, 2Kp 25 DCI, 2Kp 29.97 DCI, 2Kp 30 DCI, 2Kp 50 DCI, 2Kp 59.94 DCI, 2Kp 60 DCI, 2KPsF 23.98 DCI, 2KPsF 24 DCI, 2KPsF 25 DCI, 2KPsF 29.97 DCI, 2KPsF 30 DCI
• Ultra HD video inp ut standards: 2160p 23.98, 2160p 24, 2160p 25, 2160p 29.97, 2160p 30, 2160p 50, 2160p 59.94, 2160p 60
• 4K video standards: 4Kp 23.98 DCI, 4Kp 24 DCI, 4Kp 25 DCI, 4Kp 29.97 DCI, 4Kp 30 DCI, 4Kp 50 DCI, 4Kp 59.94 DCI, 4Kp 60 DCI
• SDI compliance: SMPTE 259M, SMPTE 274M, SMPTE 292M, SMPTE 296M, SMPTE 372M, SMPTE 424M, SMPTE 425M level A and B
• Video input color space: Rec. 709, Rec. 2020
• 3G SDI: auto detects SMPTE level A or B on SDI input
• HDMI HD video standards: 720p 50, 720p 59.94, 720p 60, 1080i 50, 1080i 59.94, 1080i 60
  1080p 23.98, 1080p 24, 1080p 25, 1080p 29.97, 1080p 30, 1080p 50, 1080p 59.94, 1080p 60
• HDMI Ultra HD video standards: 2160p 23.98, 2160p 24, 2160p 25, 2160p 29.97, 2160p 30, 2160p 50, 2160p 59.94, 2160p 62
• HDMI 4K video standards: 4Kp 23.98 DCI, 4Kp 24 DCI, 4Kp 25 DCI, 4Kp 29.97 DCI, 4Kp 30 DCI, 4Kp 50 DCI, 4Kp 59.94 DCI and 4Kp 60 DCI
• HDMI color precision: 4:2:2
• HDMI color space: YUV
• Video streaming standards: 720p 25, 720p 30, 720p 50, 720p 60, 1080p 23.98, 1080p 24, 1080p 25, 1080p 29.97, 1080p 30, 1080p 50, 1080p 59.94, 1080p 60, 2160p 23.98, 2160p 24, 2160p 25, 2160p 29.97, 2160p 30, 2160p 50, 2160p 59.94, 2160p 60

Streaming

• Direct streaming: supports RTMP (H.264)  or (SRT) H.265 streams from the Blackmagic Streaming Encoder or compatible Blackmagic cameras
• Closed captions: Web Presenter 4K supports embedding CEA‑608 and CEA‑708 closed captions in your live RTMP stream
• Time Code support: source Time Code over RTMP and SRT streams on 12G-SDI OUT

Control and monitoring

• Control panel: built-in panel with 6 buttons, spin knob control, and 2.2" color display
• Device control: front panel, USB-C or Ethernet
• External control: supports remote camera control, color corrector, Tally, and Talkback
• REST API over Ethernet for external control via HTTP when used with REST client applications
• Built-in display: 2.2" LCD for monitoring video, audio, and status plus menu settings

Software compatibility

• Works with Facebook, Twitch, YouTube, Twitter, Restream.IO, Vimeo, BoxCast, Castr, AfreecaTV, Bilibili, DouYu, Weibo, Zoom, Skype, Microsoft Teams, QuickTime Player, FaceTime, OBS Studio, Open Broadcaster, VLC, Wirecast Play, Wowza Streaming Engine

Operating systems

• macOS 13.0 Ventura, macOS 14.0 Sonoma or later
• Windows 10 (64-bit), Windows 11
• Linux: supported
• Chrome OS: supported

Power requirements

• Power supply: 1 x internal 100 - 240 V_AC
• 12 V_DC input: 1 x 4-pin XLR for +12 V_DC input (external power supply or battery use)

Physical installation

• Rack size: one-third rack unit width, 1 rack unit height

Environmental specifications

• Operating temperature: 0 to 40 °C  
• Storage temperature: -20 to 45 °C 
• Relative humidity: 0 to 90% non-condensing

Physical specifications

• Dimensions: 14 x 4.4 x 17.55 cm
• Weight: 755 g

What's in the box

• Blackmagic Streaming Decoder 4K
• Welcome wallet with QR code for software download