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Video classification

Alex Cota Updated by Alex Cota

You can use the Video classification tool to add Classifications to select frames in a video.

The following is not supported:

  • Text or dropdown classifications in export
  • Undo/redo actions
  • Create classifications via the API
  • Exports for mixed media (e.g. videos & images in the same project)

Import your video data

First, create your project in Labelbox and ensure your videos are in .mp4 format. To learn how to import your video files directly, see Direct upload. To learn how to import your video URLs via JSON, see Import via JSON. To learn how to attach metadata to your imported videos, see Asset metadata via JSON.

To learn how to import programmatically, see Bulk add data rows.

Free tier users will be able to load videos with up to 20,000 frames and 30fps.

Set up video classification

  1. Create a project.
  2. Select “Editor” as your label editor.
  3. Click “Add classification”.
  4. Select “Radio” or “Checklist” as your classification type.
  5. Click “Confirm”.
  6. Click “Complete setup”.

How it works

The Labelbox labeling interface will have some additional tools for labeling video data.

Zoom bar

Drag the endpoints on the zoom bar to adjust the amount of frames selected in the timeline. You can also drag the selection across the zoom bar to move to a different part in the timeline.

Timeline

The timeline shows the temporal progression of the video clip. You can hover over a frame in the timeline to preview it.

A single frame can have 0 or more classifications. You can assign a classification by selecting one or more frames in the timeline and choosing a classification from the left sidebar.

When you select a set of frames on the timeline, the left sidebar will only show the active classification state when the classification is true for all frames selected.

Below are some helpful shortcuts for selecting frames.

Shift+click

Select a set of consecutive frames on the timeline by clicking the first and last frame in the set.

Cmd/Ctrl+click

Select individual frames on the timeline.

Left/Right arrows

Seek the previous/next frame.

Shift+Left/Right arrows

Add the previous/next frame to the selection.

Export labels

For instructions on how to access your multi-frame point labels and a sample Video classification label export, see our docs on Video export formats.

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