Quad 3G-SDI/ASI capture card with Genlock

MH4GTX features four-channels 3G-SDI/ASI capture card with Tri-Sync, Black Burst or LTC time-codes as reference. Designed to capture digital video/audio/ANC signals or MPEG TS/T2-MI streams with 3G-SDI/ASI interfaces with support up to 3Gbps bitrates. The card is used for 24/7/365 at non stop production equipment by professionals.

Key Features:

  • Four SDI/ASI interfaces for PC applications
  • External synchronization of SDI outputs with genlock port.
  • Fanless design
  • Low latency
  • Free drivers and SDK for Windows and Linux.


  • Non-linear editing suites;
  • Studio signal switchers or master control switchers;
  • Signal matrixes;
  • Live production mixers, effects generator;
  • Signal transforming equipment;
  • Transport stream multiplexers;
  • H.264/H.265/AV1/VVI encoders/decoders;
  • Digital TV modulators etc.


SDI Video Inputs: 4 x BNC 10-bit 3G/HD/SD
SDI Audio Inputs: 16 channels embedded in 3G/HD/SD.
SDI Video Outputs: none
SDI Audio Outputs: none
Sync Input: 1x Tri-Sync, Black Burst or LTC.
System bus: PCI Express 3.0 compatible with 4, 8, 16 and 32 lane PCI Express slots


SD Video Standards: 525i59,94 NTSC, 625i/50 PAL.
HD Video Standards: 720p50, 720p59.94, 720p60; 1080p23.98, 1080p24, 1080p25, 1080p29.97, 1080p30, 1080p50, 1080p59, 1080p59.94, 1080p60; 1080PsF23.98, 1080PsF24, 1080PsF25, 1080PsF29.97, 1080PsF30; 1080i50, 1080i59.94, 1080i60
SDI Compliance: SMPTE 259M, SMPTE ST 424, SMPTE ST 425, SMPTE ST 125, SMPTE ST 291, SMPTE ST 240
SDI Metadata Support: SCTE-104; Closed captioning
IP Streams Support: MPEG TS (ISO 13818-1),  DVB T2-MI (ETSI TS 102 773).
Sampling: 4:2:2; 8 bits (YUYV, UYVY); 10 bits (V210, 10 in 16).
Color Space: REC 601, REC 709.
Audio Sampling: 48 kHz/24 bits, SD embedded.


Windows: 7, 8, 10 and newer
Windows Server: 12, 16, 19 and newer
Linux: Ubuntu 20.04.1 LTS and newer (universal Linux driver - v4l (video) and ALSA (audio) support)
Development: Stream Labs SDK, MediaLooks SDK.
Firmware: Update via driver and PCI Express line
Applications: Medialooks, MultiRec, SHBP, Variant, VMix, VPlay, MultiScrren etc.


Power Consumption: 18 Watts
Operating Temperature: 1° to 40 ° C (18° to 104° F)
Storage Temperature: -30° to 45° C (-14° to 113° F)
Relative Humidity: 10-90% noncondensing
Weight: 0.2 kg (0.3 lb)
Size (W x H x L): 15x15x128
Air flow: ≥2m/s (400LFM)
Warranty: 5 years

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