Video cameras and video editing software use different file types (e.g., .avi, .mov, .mp4, etc.) and codecs (i.e., compression formats used to manage the file size) when saving or exporting videos. The file type and codecs are often optimized for video players commonly associated with the camera/editor. Video applications such as Vernier Video Analysis must be able to make sense of the information in the video file in order to replay the video as was intended when the video was created. A movie will not play properly if the video player cannot read or understand the information contained in the video file. While Vernier Video Analysis can handle may different file types and codecs, there are some that are not supported.

A video that won’t play correctly is most likely in a format that is incompatible with the video player that Vernier Video Analysis uses for video playback. Here are some typical symptoms of an incompatible video file:

• The video plays back at the wrong rate.
• The video has fewer frames than expected.
• The video is not oriented correctly (rotated or upside down)
• The playback controls don’t work normally, preventing playback or cropping of the video.
• The video is blank.
• The timestamps don’t make sense after adding a few points.
• Something else is happening that feels like a bug in Vernier Video Analysis.

Troubleshooting

1) Make sure your browser software is up to date
Vernier Video Analysis uses browser tools that are found only in the latest browser software. Check to see if your browser has an update available. If it does update the browser to see if that helps.

2) Try loading one of the sample videos
Try loading one of the sample videos supplied with Vernier Video Analysis. Do you see the same problem in that sample video? If the issue goes away when using a sample video, you have determined that there is something different about the way Vernier Video Analysis is reading your video compared to the sample videos.

3) Try using a different browser
Not all browsers have the same functionality. Try importing the video into a different (up-to-date) browser to see if the issue goes away. If so, you may have found a browser incompatibility issue. Please let us know about it and we will investigate.

4) Try using a different camera
Try using a different camera to capture your video. If a video from a different camera works correctly, then it is likely that the file format and/or codec of the original camera is incompatible with Vernier Video Analysis on your device.

5) Try converting the video to another format
If a different camera is not an option or if you still see issues when using your own video, try converting the video to another format. For information on how to do that, see
How can I convert a video to a different file format or codec?

6) Make sure the video does not contain a slow motion segment
If a different camera is not an option or if you still see issues when using your own video, make sure the video does not contain a slow motion video segment. For more information on how to test this, see

How do I analyze slow-motion or high-speed video in your video analysis apps?

7) Try adjusting the play back speed.
If a different camera is not an option or if you still see issues when using your own video, try using a video playback adjustment tool.  Adobe Express and BeeCut Online Video Editor both have free online video adjustment tools that can be used for this purpose.

BeeCut is very simple to use. Go to https://beecut.com/online-video-editor. Select Change Video Speed from the menu and upload the video. Leave Video Rate at 1.0 x and process the video. Then download and save the converted mp4 file and test the video in Vernier Video Analysis.

A similar tool from Adobe can be found here: https://www.adobe.com/express/feature/video/change-speed

8) Contact us for additional assistance
If none of the above steps help, contact us (support@vernier.com) and we will help if possible. Please be prepared to provide your device and browser information and a sample video that shows the problem.

Related Information

Vernier Video Analysis Troubleshooting and FAQs
How do I analyze slow-motion or high-speed video in your video analysis apps?