09-04-2020, 05:08 PM
Only the EyeLink 3 can save high framerate (up to 500 FPS) of the eyes. For more information about the EyeLink 3 and its capabilities, please see our website:
Unfortunately, it is not possible to directly record high-speed video from other EyeLink systems.
In the EyeLink 1000, EyeLink 1000 Plus and EyeLink Portable Duo, the high-framerate signal sent from the camera to the Host PC is a proprietary data stream, not a standard video signal.
However, if you need a low-framerate video of the participant's eye for documentation or presentation purposes from these systems, here are a few possible workarounds:
Unfortunately, it is not possible to directly record high-speed video from other EyeLink systems.
In the EyeLink 1000, EyeLink 1000 Plus and EyeLink Portable Duo, the high-framerate signal sent from the camera to the Host PC is a proprietary data stream, not a standard video signal.
However, if you need a low-framerate video of the participant's eye for documentation or presentation purposes from these systems, here are a few possible workarounds:
- Workaround 1: Use a Video Capture device
You can use a video capture device to capture the monitor output from the Host PC. This signal can then be sent to a separate computer to be recorded as a standard video file.
Important Note: During a recording, the thumbnail images of the eyes shown on the Host PC screen refresh at a lower rate (approximately 30 Hz), so this method will not capture the full temporal resolution of the eye tracker.
- Workaround 2: Record the Participant's Eye Directly
Use a separate video camera aimed directly at the participant's eye. To synchronize this external video with your EyeLink data, you can use a distinct event at the start of each trial, such as:- A brief flash of light.
- An audible beep recorded by the camera's microphone.
- A TTL pulse sent to a shared recording device.
- A brief flash of light.