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Black rectangular USB-C capture box with SDI and HDMI ports, volume knobs and audio jacks

BZBGEAR

BZBGEAR BG-12GCSA 12G-SDI USB-C 3.1 Gen 1 Video Capturing Device

SKU CH-GVGX-35B3E

USB-C capture box records 12G-SDI up to 4K at 30 fps or 1080p at 120 fps with HDMI 2.0 loop-out, 7.1-channel audio and 3–4 ms latency

  • Power draw8 W [max]
  • Supported resolutionsUp to 4K2K@30/1080P@120
  • Video capabilitiesUp to 4K2K@60
  • SoundHDMI output/ SDI loopout up to 7.1ch, Toslink up to 5.1ch, S
  • SDI ports12G-SDI
  • Software and appsOBS Studio (Windows, Linux, MAC), AMCap (Windows), Potplayer
  • Capture 4K at 30 or 1080p at 120 via 12G-SDI
  • Loop out 4K at 60 through HDMI 2.0 and SDI simultaneously
  • Mix microphone audio with SDI feed up to 7.1 channels
  • Ready to stream in seconds with auto format detection
  • Low 3 to 4 ms latency at 1080p for live production

Professional SDI Capture for USB-C Workflows

The BG-12GCSA is a USB-C 12G-SDI video capture device designed for broadcast and streaming professionals who need to ingest SDI signals into a computer. It accepts 12G, 6G, 3G and HD-SDI inputs with automatic format detection. The integrated scaler and HDMI 2.0 loop output allow simultaneous monitoring while capturing up to 4K2K@30 or 1080P@120.

Thermals Noise and Power Draw

The unit draws a maximum of 8 watts from a 5V DC supply, so it runs cool and silent without active cooling. Low latency of 3~4ms at 1080P keeps audio and video in sync during live production. The compact 7.3 oz enclosure adds negligible heat to a workstation or mobile rig.

12G-SDI Input with 4K2K@60 Loop Out

The single specification that defines this capture device is its 12G-SDI input paired with an HDMI 2.0 and 12G-SDI loop output supporting up to 4K2K@60. Buyers who need to capture higher frame rates at 4K or who require multi-channel input should look elsewhere.

How it compares

Measured against everything we stock in Video Capture Cards & Boxes, at today’s prices. Recalculated every night.

Price $574.99
Pricier than about 91% of the 987 comparable items (median $43.99).

Specifications

Product
Brand nameBZBGEAR
Model nameBG-12GCSA
Product colorBlack
Display
Supported resolutionsUp to 4K2K@30/1080P@120
Audio & video
Video capabilitiesUp to 4K2K@60
SoundHDMI output/ SDI loopout up to 7.1ch, Toslink up to 5.1ch, Stereo audio up to 2ch
Ports & slots
SDI ports12G-SDI
Power
Power draw8 W [max]
Power supply5 V DC
Size & build
Product weight7.3 oz [207g]

Questions about this item

How do I install the BG-12GCSA and what step is often missed?

Connect the 12G-SDI source to the input, link the USB-C 3.1 Gen 1 cable to the host, and attach the 5 V DC power supply; the step people miss is powering the unit before the host recognises the device.

What maintenance or replacement will the BG-12GCSA need later?

No user-serviceable parts are inside; keep the ventilation slots clear and verify the 5 V DC adapter remains firm — the only replaceable item is the external power supply if it fails.

What limit appears first during sustained capture with the BG-12GCSA?

The scaler caps capture at 4K2K 30 while the loop-out passes 4K2K 60, so the 30 frame ceiling is the first bottleneck in long sessions.

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