Trinet Stereo

Trinet Stereo has two ultra-wide cameras 70 mm apart, recording both eyes together with motion data and audio on one clock. Every unit is calibrated individually at the factory, so recordings are ready for stereo depth, 3D reconstruction and stereo visual-inertial odometry.

Two ultra-wide cameras, 70 mm apart. Worn on the head strap — see [Mounting](../get-started/mounting.md).

Specifications

Cameras	2, baseline 70 mm
Sensors	3 MP rolling shutter, recorded at 1920×1080 per eye
Frame rate	30 fps (nominal)
Codec	H.264 (default) or H.265 for card recordings (firmware 0.5.7 or newer); live USB stream is H.264
Card bitrate	Constant 10 Mbps per eye
Storage	About 10 GB per hour (both eyes, audio and motion data)
Lens	Ultra-wide fisheye; effective field of view about 158° horizontal × 94° vertical per eye (from calibration)
Frame timing	Timestamped at mid-exposure of the centre image row; rolling-shutter readout about 32 ms, reported per frame
Motion sensing	3-axis accelerometer (±8 g), 3-axis gyroscope (±2000 °/s) at 400 Hz; 3-axis magnetometer at about 100 Hz
Audio	Stereo microphones, AAC, 44.1 kHz on card recordings
IMU–video alignment	Sub-millisecond, hardware-timestamped
Recording to card	One button; no limit on take length
Live streaming	USB webcam mode: one 3840×1080 side-by-side stream (both eyes) to Android or a computer
Wireless	Multi-camera sync; recording-status broadcast readable by the Trinet app
Calibration	Every unit calibrated at the factory; stored on the camera and embedded in every recording
Weight	About 51 g
Power	USB-C, 5 V; a supply of 1 A or more is recommended

Recordings

Each take is saved as two video files — one per eye — plus timestamps for each eye and one motion data file:

Trinet/recording/take0001_L.mp4    left eye
Trinet/recording/take0001_R.mp4    right eye
Trinet/recording/take0001_L.vts    left-eye frame timestamps
Trinet/recording/take0001_R.vts    right-eye frame timestamps
Trinet/recording/take0001.imu      motion data

Both video files carry the camera's identity and its factory calibration. See Files on the card.

Heat

Trinet Stereo does not pause for heat when used on its own. If it reaches its critical temperature it saves both eyes, the light shows solid red for about two seconds, and the camera switches off. Reconnect power to start again. In a Wrist Kit, a kit-wide cooling pause is used instead. See Heat and thermal protection.

iPhone

Trinet Stereo streams in USB webcam mode only. iPhone streaming is available on Trinet Mono.