Applications for FBF seeking:

Media Player Classic (Default on Lab computers):

On the lab computers, the default applicaiton that opens videos should be Media Player Classic. To do frame by frame seeking, presss Ctrl + Right Arrow.

Note: If you would like to view this video in full screen, you can click on the McMaster logo found in the bottom right corner (this opens the video in a new tab).

MacOS Devices:

MacOS devices like MacBook’s can use the default media player QuickTime Player. Using the arrow keys, you can move through videos frame by frame. If you would like to save images of each frame for analysis, you can copy the image using ⌘ + C. Then open Preview, File -> New from Clipboard.

Windows Devices:

Windows devices can make use of the default video player, Windows Media Player. The arrow keys will NOT scroll frame-by-frame. Instead, access the menu as such:

1. Open the video with Windows Media Player.
2. Right click anywhere on the video, and open the Enhancements menu.
3. Open the Play Speed setting menu.
4. At the bottom, there will be 2 buttons used for frame-by-frame seeking.

Note: If you would like to view this video in full screen, you can click on the McMaster logo found in the bottom right corner (this opens the video in a new tab).

Using Third-party Apps:

There are a large number of third-party applications that can also use frame-by-frame seeking for Windows, MacOS, iOS, and Android. It is NOT recommended to use VLC, as there are bugs surrounding the use of FBF. Use of third party apps is discouraged because it will be your responsibility to learn and properly use their features.

Finding Framerate:

Framerate is an important quality of videos when doing FBF analysis, as it tells you how many seconds pass between each frame, allowing you to track change in distance over time. Framerate is most commonly displayed in the properties of a video, and can be seen in the following ways:

• Some iPhone’s and Android devices allow you to select your framerate before recording, or change it in the camera settings of your devices
• In the gallery or photo’s app of your device, framerate is commonly displayed in the ‘properties’ or ‘details’ of the video.
• On a Mac, using the “inspector” from QuickTime player will show the framerate.
• On PC, right clicking and finding the video properties will display the framerate.

If for some reason these options are unavailable to you, you can manually find the framerate in the following way:

One can count the number of frames between two events in a video separated by a known time, for example, if there are 15 images in 0.5 s, then the frame rate is 30 fps (fps = frames per second), and the time between frames is then: τ = (1/30) seconds. This can be done by using the google stopwatch feature, and taking a video of your computer screen once the stopwatch is turned on. See how many frames are needed to advance one second and that is your frame rate (see the image below).