Here's how students upload video into Pivot Interactives for video analysis.
Some features of video upload are not supported in IOS
Pointers for recording useful video:
- Record in an area with lots of light. This will reduce the exposure time and reduce motion blur
- Hold camera still; use a tripod, or rest camera on stationary surface
- Point the camera perpendicular to the direction of motion
- Make sure to place an object of know size in the video, with the object the same distance from the camera as the moving object. You'll need it to scale the rulers when you analyze the video
Once you have a good video, send the video to your computer:
- email the video to yourself from your phone and retrieve the file using your email account while on your laptop
- use Airdrop in IOS or Google Drive to transfer the file to your laptop
Only .mp4 video can be uploaded to Pivot Interactives. You can use free online conversion tools like Cloud Convert to quickly convert any video file to .mp4. Here's how:
- Go to Cloud Convert
- Click Select Files
Go to Cloud Convert and click Select Files
- Select .mp4, and click Start Conversion
Select .mp4 format and click Start Conversion
- When the conversion is complete, click Download to download the video
Once you have the converted video on your computer, open the activity your teacher made and click Show Settings below the video window:
- Click Choose File to select the video from your computer. Only .mp4 files less than 50MB will be accepted
- The Recorded Frame Rate is the frame rate at which your camera recorded. For normal speed video, this is usually 30 fps (frames per second). If the video is slow motion, the recorded frame rate may be 60 (2x slow motion), 120 (4x slow motion) or 240 (8x slow motion). The stopwatch in Pivot Player is calibrated using the frame rate you enter. If the frame rate you enter is not the correct one, the stopwatch readings will be incorrect. You can change the frame rate setting after you upload the video if you need to try a different frame rate.
- Playback Frame Rate adjusts the playback speed. Normally this is 29.97 frames per second. If the video appears to play back at an unexpected speed, or if frames are missing or repeated, adjust the playback frame rate. This setting can be changed after the video is uploaded.
- You can select a tool color that gives the most contrast and best visibility for the tools. You can change the tool color after the video has been uploaded.
- Click Update once you have the settings entered. Wait for the video to load. Once it does, the video should appear in the video player.
Once the video appears, you can use the Pivot Player tools to analyze the video, following your teacher's instructions in the activity. Here are some tips:
- To calibrate rulers, drag the ruler over the object of known size. Click on the corner of a ruler and drag to resize. In the example below, the ruler is calibrated by stretching it to match the length of the car (4.6 meters). Once the ruler is calibrated, it can be repositioned and used to make position measurements.
Drag the a ruler or grid over the object of known size in the video. Click an edge or corner of the ruler and scale it so it matches the size of the object. In this case, the car is 4.6 meters long, so the ruler is calibrated so the car is 46 units long. Measurements made with this ruler can be converted to meters by dividing by 10.
The stopwatch can be used to measure time in the same way in any other Pivot Interactives video. As long at the recorded frame rate and playback frame rate are selected correctly, the stopwatch will give accurate time measurements.
Now you can make measurements of position and time in your video. Your teacher will give you more instruction about how you can use this tool.