12G-SDI

SDI Input

Fill+Key

SDI Outputs

Mon Out

SDI Monitor

2160p60

Ultra HD Max

Bi-Dir

Capture + Play

TB4

Bus Powered

The Blackmagic Design UltraStudio Mini Replay 12G is the most capable model in the UltraStudio Mini 12G family — a compact, single-cable Thunderbolt 4* interface that does both capture and playback simultaneously. Connect one Thunderbolt cable, draw 15W from the bus, and you have a full bidirectional broadcast I/O solution with dedicated 12G-SDI fill and key outputs, a separate 12G-SDI monitoring output, and a 12G-SDI input for live switcher multiview monitoring.

Whether you are running live action replay in DaVinci Resolve, keying broadcast graphics over a live production switcher, or using your laptop as a real-time AI video processor — the UltraStudio Mini Replay 12G handles it all over a single Thunderbolt cable from a device smaller than a paperback book.

* Requires a computer with a Thunderbolt 4 USB-C port.

Blackmagic Design UltraStudio Mini Replay 12G — compact Thunderbolt 4 12G-SDI bidirectional capture playback interface fill key output live replay broadcast graphics AI processing Ultra HD 2160p60

Blackmagic Design UltraStudio Mini Replay 12G — 12G-SDI capture and playback with fill, key, and dedicated monitor output via Thunderbolt 4

Why Broadcast Engineers Choose the UltraStudio Mini Replay 12G

🔁

Simultaneous Capture and Playback

Bidirectional 12G-SDI over a single Thunderbolt 4 cable. Capture from your SDI input while simultaneously outputting video through the fill and key outputs — in real time, with extremely low latency.

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Dedicated Fill + Key SDI Outputs

Two independent 12G-SDI outputs — one fill, one key — connect directly to a production switcher's downstream keyer. The keyer can be muted so graphics hold off-air until the replay or stinger triggers.

🖥️

Dedicated 12G-SDI Monitor Output

A separate always-active SDI monitoring output lets you set up the next replay clip while the current one is playing to air — essential for live sports replay and news production workflows.

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12G-SDI Input for Live Monitoring

The SDI input connects to your switcher multiview so operators can monitor the live program feed while preparing replays. Or use it as a live video input for real-time AI processing or broadcast graphics generation.

⚡

Thunderbolt 4 — Bus Powered

One cable. 15W from the bus. No AC adapter. Works with any Apple Silicon Mac or Thunderbolt 4 / Thunderbolt 5 Windows and Linux PC — the entire replay rig fits in a laptop bag.

🤖

Real-Time AI Video Processing

Because the Thunderbolt link is fully bidirectional, the computer can capture, process, and output video simultaneously. Use your laptop as a real-time AI processor — overlay AI-generated graphics directly over a live SDI input feed.

🎬

Live Action Replay in DaVinci Resolve

The DaVinci Resolve cut page replay features work natively with the UltraStudio Mini Replay 12G. Capture, cue, and play back replays with automatic stingers. On-air controls trigger the downstream keyer in the switcher with a single button.

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HDR + Rec. 2020 — Hardware Colorspace Conversion

HDR static metadata packing with HLG and PQ transfer characteristics. Real-time hardware colorspace conversion between Rec. 601, Rec. 709, and Rec. 2020 — processed on the device, not the CPU.

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Mac, Windows and Linux

Full cross-platform support for macOS 15 Sequoia and macOS 26 Tahoe or later, Windows 10 and 11, and Linux — using the same free Blackmagic Desktop Video driver across all platforms.

Connections and Features for Replay and Processing

UltraStudio Mini Replay 12G connection diagram — 12G-SDI fill key monitor out SDI input Thunderbolt 4 broadcast replay workflow

The UltraStudio Mini Replay 12G is more powerful than the other Mini models because it has both capture and playback — all over a single Thunderbolt connection. The dedicated 12G-SDI fill and key outputs connect to a production switcher's downstream keyer, which can be muted so video will not key on the switcher until the replay starts. An extra 12G-SDI output is dedicated to monitoring so you always have an active output to set up the next replay clip. The 12G-SDI input is perfect for live monitoring of a switcher multiview — or for rendering broadcast graphics and AI processing over a live video feed, since the UltraStudio Mini Replay 12G is fully bidirectional.

UltraStudio Mini Replay 12G live production situation — sports replay broadcast graphics news editing Thunderbolt laptop workflow

Supports Independent Fill and Key Outputs

UltraStudio Mini Replay 12G independent fill and key SDI outputs — broadcast graphics transparency keying over live production switcher

With dual 12G-SDI outputs, the UltraStudio Mini Replay 12G connects directly into live production switchers so graphics can be overlaid with full transparency. Internally, there is hardware support for both RGBA and YUVA frame buffers. With RGBA graphics, video frames automatically transcode RGB pixels to YUV 4:2:2:4 on both fill and key outputs at full 10-bit precision.

The two SDI outputs connect to a live production switcher where they are keyed over video. The key output ensures smooth blending of transparent elements — making the UltraStudio Mini Replay 12G ideal for broadcast graphics, lower thirds, and stingers in live sports, news, and entertainment production.

Simultaneous Capture and Playback

UltraStudio Mini Replay 12G simultaneous capture and playback workflow — bidirectional 12G-SDI Thunderbolt 4 real-time AI processing broadcast graphics

The UltraStudio Mini Replay 12G uses the same Desktop Video software driver found in Blackmagic's professional DeckLink capture cards. This driver supports simultaneous real-time bidirectional transfer of video data to and from the computer with extremely low latency. You can capture image data into the computer from the SDI input while at the same time sending processed video back out through the SDI outputs.

This opens up solutions that go well beyond replay. Use your computer as a real-time keyer, generate broadcast graphics over a live input, or apply AI-based processing directly overlaid on live video — all through a single Thunderbolt cable from a device small enough to fit in a jacket pocket.

Compatible Software Applications

The UltraStudio Mini Replay 12G works natively with leading editing, replay, and broadcast production applications via the included Blackmagic Desktop Video driver.

DaVinci Resolve

Replay / Edit / Color

Fusion

VFX / Compositing

Final Cut Pro

NLE / Editing

Adobe Premiere Pro CC

NLE / Editing

Adobe After Effects CC

Motion Graphics

Avid Media Composer

Broadcast NLE

Also compatible with: Adobe Photoshop CC, Adobe Character Animator CC, Avid Pro Tools, Steinberg Cubase, Steinberg Nuendo, The Foundry Nuke, Grass Valley Edius, Telestream Wirecast, Resolume Arena, Vegas Pro, vMix, OBS Studio, ProPresenter, TouchDesigner, CasparCG, XSplit Broadcaster, Boinx MimoLive, and many others. Third-party support may vary — verify with your software vendor.

Who the UltraStudio Mini Replay 12G Is Built For

Live Sports Replay Operators Broadcast Graphics Engineers News Production Workflows AI Video Processing Live Production Engineers House of Worship Production

Supported Codecs — Capture and Playback via 12G-SDI

Codec Family	Formats	Best For
Apple ProRes	4444, 422 HQ, 422, 422 LT, 422 Proxy	High-quality replay capture and playback via SDI for DaVinci Resolve live replay workflows
Avid DNx	DNxHD, DNxHR	Native Avid ingest and SDI monitor output for broadcast review and sports production
Uncompressed	8-bit 4:2:2 · 10-bit 4:2:2 · 10-bit 4:4:4	Maximum precision for broadcast graphics, VFX keying, and color-critical live production
HEVC / H.265	HEVC	Efficient capture for streaming delivery and replay archive workflows
DPX	DPX	Cinema and VFX pipeline capture from 12G-SDI broadcast sources
XDCAM	XDCAM EX · HD · HD422	Sony broadcast camera capture and archive ingest workflows
DVCPRO	DVCPRO50, DVCPRO HD	Legacy Panasonic format capture and archive transfer via SDI
Other	AVC-Intra · AVCHD · Canon XF MPEG2 · DV-NTSC · DV-PAL · HDV · Digital SLR	Mixed-source capture for multi-format live production and replay environments

Full Technical Specifications — Blackmagic Design UltraStudio Mini Replay 12G

Model	Blackmagic Design UltraStudio Mini Replay 12G
SDI Video Inputs	1x 12G-SDI
SDI Video Outputs	2 total — 1x Fill, 1x Key
SDI Monitor Output	1x dedicated 12G-SDI monitoring output (always active)
SDI Rates	270Mb (SD) · 1.5G (HD) · 3G · 6G · 12G
SDI Audio Input	16 channels embedded — 48 kHz / 24-bit
SDI Audio Output	16 channels embedded — 48 kHz / 24-bit
Computer Interface	Thunderbolt 4 (USB-C)
Power	Bus powered via Thunderbolt cable — 15W, no AC adapter required
Compatible Hardware	Apple Silicon Macs · Thunderbolt 4 and Thunderbolt 5 Windows PCs · Linux
Operating Systems	macOS 15.0 Sequoia and macOS 26.0 Tahoe or later · Windows 10 (64-bit) and Windows 11 · Linux
Ultra HD / 4K SDI	2160p23.98–2160p60 · 4Kp23.98–4Kp60 DCI
HD Standards	720p50/59.94/60 · 1080i50/59.94/60 · 1080p23.98–1080p60 · 1080PsF
2K DCI (SDI)	2Kp23.98–2Kp60 DCI · 2KPsF23.98–2KPsF30 DCI
SD Standards	525i59.94 NTSC · 625i50 PAL
SDI Color Precision	8, 10, 12-bit RGB 4:4:4 (up to 2160p30) · 8, 10-bit YUV 4:2:2 (all standards)
Color Space	Rec. 601 · Rec. 709 · Rec. 2020
HDR Support	HDR static metadata packing · HLG · PQ transfer characteristics
Colorspace Conversion	Hardware-based real time
SMPTE Compliance	259M · 292M · 296M · 424M · 425M (A and B) · 2081-1 · 2081-10 · 2082-1 · 2082-10 · 2084 · ST2108-1
Hardware Frame Buffer	2vuy (8-bit YUV) · ARGB · BGRA (8-bit RGB) · Ay10 (10-bit YUVA) · r210 (10-bit RGB) · v210 (10-bit YUV) · R12B · R12L (12-bit RGB)
Software Included	Media Express · Disk Speed Test · LiveKey · Blackmagic Desktop Video Utility · Blackmagic driver (Mac and Windows) · Media Express · Desktop Video Utility · driver (Linux)
Operating Temperature	5 to 40°C (32 to 104°F)
Storage Temperature	-20 to 45°C (-4 to 113°F)
Relative Humidity	0% to 90% non-condensing
What's Included	UltraStudio Mini Replay 12G · Welcome wallet with QR code for software download
Warranty	1 Year Limited Manufacturer's Warranty

Ready to add live replay and broadcast graphics to your production?

Coremicro is an authorized Blackmagic Design reseller. The UltraStudio Mini Replay 12G ships with full manufacturer warranty and support. Questions about integrating replay into your existing SDI infrastructure or switcher setup? Our team works with broadcast gear every day.

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