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Capture.U 1.3.1 is the latest release of Vicon’s movement analysis software for biomechanical insights in the field. It works seamlessly with Vicon Blue Trident sensors to provide real-time data overlaid on video, enabling biomechanists, researchers, coaches and sports teams to analyze subject or athlete movement by assessing live information.

It includes new features such as support for the Blue Trident Firmware 10 and enabling the retention of the calibration when you are capturing global angles. In addition, a number of issues reported since the last release of Capture.U have been addressed.

For more information, see:

Watch the Vicon video Capture.U 1.3.1 - What's New? on YouTube.

What's new in the Capture.U app 1.3.1?

To use the Capture.U app 1.3.1, you must upgrade the Blue Trident sensor firmware to 10 or later. To do this, use Capture.U Desktop 1.3.1 or later.

The latest version of the Capture.U app provides these new features:

For information on previous versions of the Capture.U app, see the relevant PDFs.

Support for Blue Trident Firmware 10

The latest version of the Capture.U app supports Firmware 10.#, for both first-generation Blue Trident sensors and the new second-generation sensors.

If you connect Blue Trident sensors that are running Firmware 9, you are alerted of their incompatibility, and are required to perform a firmware upgrade.

To do this, you must use Capture.U Desktop 1.3.1 or later. For information on how to upgrade the firmware, see Update sensor firmware.

Access calibration walkthrough from Settings

You can now quickly access an animated walkthrough on how to calibrate your Blue Trident sensors.

To view the calibration walkthrough:

  1. On the Home screen, tap the Settings icon (the cog symbol, bottom right).

  2. From the options, select How to calibrate.

Global angles calibrations remembered between sessions

When you collect or stream global angles, you must calibrate each sensor (for a reminder of how to do this see Calibrate IMUs).

Calibrations for global angles now persist on Blue Trident IMU sensors across each trial or streaming mode, so it is not necessary to calibrate with every trial. For example, you can calibrate in Real-Time Insight capture mode and then capture global angles in To Sensor mode and the calibration is retained.

The calibration for a given sensor is only retained if the subsequent trial which uses that sensor also collects or streams global angles. You must re-calibrate for the next global angles trial if:

  • The subsequent trial for that sensor does not capture global angles, for example, if you capture global angles and then capture a raw data (ie, High-g) trial.
  • The sensors have not actively collected or streamed data in any mode for two hours.

The calibration is retained, even if you close the app, relaunch Capture.U and capture another trial with global angles, provided the new trial takes place within a two-hour period.

Sensor calibration status indicator

New sensor indicators and onscreen prompts now provide you with more feedback on when you need to calibrate sensors.

When global angles are enabled in any collection or streaming mode, an icon is displayed at the top right of each sensor on the sensor selection screen, indicating its calibration status. If a calibration is required, a 'Require calibration' icon is displayed.

When you start a capture and a sensor requires calibration, a message prompting you to calibrate the sensor is displayed at the bottom of the screen:

When you select a calibrated sensor and start a capture, the sensor is configured and a message is briefly displayed, prompting you to check that all sensors are in range and to wait for them to finish configuring.

To let you know that a sensor is calibrated, a C (Calibrated) icon is displayed at the top right of the sensor:

  • While global angles are streaming or being captured in To Sensor or To Device modes
  • When you select the next trial for any capture mode after calibrating the sensor for global angles

The calibration status of the sensors is not updated unless the trial or stream has stopped or 60 seconds has elapsed, to enable you to calibrate multiple sensors. After a collection or stream has started, you can calibrate all sensors simultaneously if you wish.

What's new in Capture.U Desktop 1.3.1?

The latest version of Capture.U Desktop provides these new features:

For information on previous versions of Capture.U Desktop, see the relevant PDFs.

Support for Blue Trident Firmware 10

Capture.U Desktop 1.3.1 supports Firmware 10.# only.

When you connect sensors with out-of-date firmware to a PC that is running Capture.U Desktop, you are prompted to upgrade to Firmware 10.#.

The new Blue Trident second-generation sensors are supplied with Firmware 10. However, if you have first-generation Blue Trident sensors, you must upgrade them to be able to use Capture.U 1.3.1.

Blue Trident Firmware 10 is found in the following location:

C:\Users\UserName\AppData\Roaming\Capture.U Desktop\firmware

For instructions on upgrading firmware, see New process for upgrading firmware.

New process for upgrading firmware

You can now update Blue Trident firmware using a new workflow in Capture.U Desktop that is easier to use and improves the reliability of the upgrade process.

To upgrade your Blue Trident firmware to version 10.#:

  1. Plug in the out-of-date sensor(s) to a PC that is running Capture.U Desktop 1.3.1 or later.
    On the Sensor tab, a list of connected sensors is displayed. For each out-of-date sensor, a notification indicates that an upgrade is required and specifies the version to update to, together with other details.

    • If you're using second-generation Blue Trident sensors, do not downgrade your sensor firmware.
    • If you have first-generation Blue Trident sensors, you can safely downgrade their firmware, if necessary.  However, as Capture.U 1.3.1 Desktop is not compatible with firmware earlier than 10.#, if you downgrade the firmware from version 10, you must uninstall Capture.U 1.3.1 and use an earlier version of Capture.U.
  2. As instructed by the notification, hold down the button on the Blue Trident's cradle for 10 seconds.
    The sensor notification updates to display Waiting for sensor to restart for firmware upgrade, then Firmware upgrade in progress and finally, on completion, Success! Will now reboot sensor.

    After the sensor reboots, the display on the Sensor tab returns to normal.

For full instructions on upgrading firmware, see  Update sensor firmware.

Preview captured data when capturing global angles

With Firmware 10, you can preview the resultant acceleration when global angle data is captured to the sensor, making it easier to create or modify regions of interest or to crop the trial.

Log file available in Capture.U Desktop

If you need to send a detailed log file to Support, you can use command line options to generate a log file and to specify its level of reporting and location. Log files can be extremely useful in troubleshooting an issue in Capture.U Desktop.

Log files, which are readable text files, are kept for each day the system is used. No more than 10 files are kept on disk.

To generate the log files in their default locations:

  • On Windows, to access the log files:
    1. In a Command Prompt window, run these commands:
      cd C:\Users\UserName\AppData\Local\Programs\captureu-desktop
      "Capture.U Desktop.exe" --loglevel debug
    2. To find the log files, go the following default location:
      C:\Users\UserName\AppData\Roaming\Capture.U Desktop\logs
  • On Mac, to access the log files:
    1. In the Terminal, run this command:
      open Capture.U\ --args --loglevel debug
    2. To find the log files, go the following default location:
      ~/Library/Application Support/Capture.U Desktop/Logs

To specify a custom path for the log files:

On Windows:

Open a Command Prompt window and enter the following:

cd C:\Users\UserName\AppData\Local\Programs\captureu-desktop


"Capture.U Desktop.exe" --loglevel debug --logdir "PathToLogfile"

For example, to specify that detailed log files are saved to a folder that you created called logs on your Windows Desktop, enter the following command:

"Capture.U Desktop.exe" --loglevel debug --logdir "C:\Users\UserName\Desktop\logs"

On Mac:

In the Terminal, enter the following:

open Capture.U\ --args --loglevel debug --logdir "PathToLogfile"

For example, to specify that detailed log files are saved to a folder that you created called logs on your Mac desktop, enter the following command:

open Capture.U\ --args --loglevel debug --logdir "Users/UserName/Desktop/logs"