Video Capture Options




Capture Duration

Choose the Video Capture Synchronized with Sensor Data Collection option if you want the video capture to be the same length as the data-collection experiment. To change the experiment length, use the Data Collection dialog.

Choose the Video Capture Only option if you want the video capture to be independent of the data-collection experiment. After choosing this option, enter the length of the video capture and the unit of time, e.g. second, minute, hour.

Time-Lapse Capture
If you want to collect a time-lapse movie, choose the Time-Lapse Capture option. Extended video capture will create very large files unless this feature is used.

Enter the time between frames and the unit of time, e.g. second, minute, hour.


Advanced Video Capture Options



Capture File Name Starts with:

Each video capture is saved as a separate file when the associated Logger Pro file is saved. The video file names will begin with the name entered in this field, and a number is appended to successive video capture files. Most users will not need to adjust this entry.

Adjust Video/Data Synchronization

The option Adjust Video/Data Synchronization allows you to correct for typical differences in video and data startup times. The difference is usually less than half a second, so if this discrepancy will not affect your experiment and analysis, you do not need to use this option.

To adjust the video/data sync, you will need to first determine the time offset between the video and the data streams. Do this by collecting a run in which there is some event that can be identified unambiguously in both the video and data streams. For example, you might take a video of your finger tapping a force sensor, or your thumb covering the end of a light sensor. Use the methods found in the Sync Movie to Graph page to determine the time offset. If the Movie time from the Movie Synchronization dialog is always greater than the Data set time, then the video is said to be behind the data. Enable Adjust Video/Data Synchronization, choose “behind” from the menu, and then enter the appropriate time difference in seconds. Typical values are around 0.500 seconds, with the video behind, but this will depend on your computer, your camera, and how busy the computer is when a capture is started.

Camera Settings
Clicking this button will bring up the camera manufacturer's dialog box which should allow you to adjust the camera settings. Options might include being able to set the shutter speed, control the contrast, control white balance, etc. The options available will be determined by the camera manufacturer and the particular camera driver in use, not Logger Pro.