Temporal annotation

Annotate video, audio, and sequential data with frame-perfect accuracy, track complex events across timelines, and train your AI models faster.

Temporal annotation engine

Frame-level precision

Frame-by-frame video and audio navigation with millisecond precision for perfect time-lapse.

Keyframe interpolation

Automatic extrapolation of motion and shape (box/polygon) size changes between keyframes to speed up markup.

Multi-track timeline

Support for an unlimited number of parallel tracks for simultaneous tracking of different events, classes, or objects.

Audio waveform rendering

Detailed visualization of sound waves for ultra-precise segmentation of speech, phonemes, or specific audio events.

Multi-modal synchronization

Synchronize video stream with text transcriptions or sensor data (e.g., telemetry) in a single timeline.

Interactive event splitting

Quick tools (hotkeys) to cut, merge, or shift time intervals without interrupting playback.

Quality control & collaboration

Timestamp-linked comments

The ability to leave comments with a link to a specific frame.

Contextual guidelines panel

Instructions and examples (frame references) embedded in the editor interface to minimize errors.

Consensus & cross-review

Ability to mark up a single media file in parallel by multiple annotators with subsequent merging (merge) and conflict resolution.

Playback speed control

Adjust the playback speed (0.25x-2x) for convenient review of fast or long events.

Analytics & data export

Temporal format exports

Upload ready-made datasets in specific video/audio formats (JSON, XML, ELAN, WebVTT, COCO-Vid).

Media-centric analytics

Tracking markup speed, taking into account specifics (statistics for the time spent on 1 file).

Current stage tracking

Monitoring the current processing status for each file (Uploaded, Annotated, In Review, Done).

Duration-based filtering

Global search and filtering of media files by their length, number of events or percentage of completion.

Data consistency reports

Automatic reports on gaps in tracking (for example, an object disappeared and appeared without the corresponding "occluded" tag).

Talk to temporal data experts

Custom solution? hello@keylabs.ai