US 
Yuan SC542N2-L SDI PCIe SDI Capture Card with 2 x SDI Inputs at 1080p60
PCI ExpressSC542N2-L SDI Overview
A two-camera stream or recording needs both SDI feeds captured in step, with each one still reaching its monitor. The SC542N2-L SDI is Yuan’s 2-channel PCIe SDI capture card for that set-up, with two SDI inputs and two SDI loop-through outputs on one short card.
Each channel captures SDI up to 1920 x 1080p at 60/50 fps, with HD-SDI at 1080p30/25/24, 1080i60/50 and 720p60/50, and SD-SDI at 720 x 480i and 720 x 576i. Color formats for capture and preview are 8-bit RGB24 and RGB32 at 4:4:4, YUY2 at 4:2:2, and YV12 and NV12 at 4:2:0. Two embedded audio channels are captured as stereo 16-bit at 32 to 48 kHz. On-board processing handles cropping and scaling, auto signal detection and deinterlacing. There is no built-in hardware encoder, so any encoding is left to the host software.
The card uses a PCIe x1 Gen2 link. Yuan provides a Windows and Linux SDK, supports DirectShow and V4L2 software, and lists vMix, OBS, Zoom, Skype, Teams, Discord, Slack, Cisco Webex and GoToMeeting as compatible applications. The SC542N1-L SDI is the single-channel version, and the SC542N4-L SDI captures four SDI feeds on PCIe x4.
Yuan supports Windows 7, 8, 8.1 and 10, Linux 2.6.14 or later in 32-bit and 64-bit form, Linux on ARM, and the NVIDIA Jetson TX2, Nano, AGX Xavier and Xavier NX. The board measures 122.3 x 68.9 mm and carries 16 GPIO lines and a watchdog. The loop-through outputs keep both feeds on their local monitors while recording runs. Yuan lists multi-device and multi-instance support, for hosts that run more than one card or capture session.
SC542N2-L SDI Specifications
| Overview | |
|---|---|
| Brand & Model | Yuan SC542N2-L SDI |
| Video Capture | |
| Host Interface | PCIe [x1, Gen2] |
| Simultaneous Video Inputs | 2 |
| Video Input | 2x SDI |
| Video Resolution Input | HD30 [1920x1080p @ 30/25fps] |
| Video Output | 2x SDI |
| Video Resolution Output | HD60 [1920x1080p @ 60/50fps] |
| Color Format | NV12 RGB24 RGB32 YUY2 YV12 |
| Audio Input | 2x SDI Embedded Audio Input |
| Audio Output | 2x SDI Embedded Audio Output |
Official Yuan USA Distributor
Things Embedded is an official Yuan USA distributor, supplying the SC542N2-L SDI installed in the capture PCs we build for USA broadcast and AV projects. Within the Yuan range the SC542N4 SDI captures four SDI feeds on PCIe x4, and the SC542N2-L Hybrid pairs one SDI channel with a DVI-I channel.
With two SDI channels and loop-through the SC542N2-L SDI sits among our PCIe capture cards and our SDI video capture cards. Where two SDI cameras must be captured at 1080p60 from one short PCIe x1 slot, with both feeds still reaching their monitors, this is the model to specify.
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