Live Annotation
Draw on live video. Telestrator. Collaborative markup.
Annotate directly on your live stream with freehand drawing, shapes, spotlights, and timed overlays. Multi-user collaboration with frame-accurate replay.
Mark up your stream in real-time
From sports telestration to surgical training. Draw, highlight, and collaborate directly on live video.
Freehand drawing
Draw directly on the live video feed with configurable pen size, color, and opacity. Strokes render at 60fps with zero visible delay.
Spotlight and pointer
Highlight areas of interest with spotlight circles, arrows, and animated pointers. Auto-fade after configurable duration.
Shape overlays
Rectangles, circles, lines, and custom shapes. Snap-to-grid alignment. Saved templates for recurring analysis layouts.
Multi-user collaboration
Multiple annotators work simultaneously with color-coded cursors. Role-based permissions control who can draw, erase, or approve.
Timed annotations
Annotations appear and disappear on schedule. Program a sequence of highlights for replay analysis or tutorial walkthroughs.
Export and replay
Export annotated segments as video clips. Replay annotations frame-by-frame for sports analysis or training review.
Technical specifications
Three steps to live annotation
Connect your stream
Route any live video source into the annotation workspace. Works with NDI, SRT, WebRTC, and RTMP inputs.
Pick your tools
Select pen, shapes, spotlight, or pointer. Configure colors, sizes, and fade timing. Load saved templates for recurring workflows.
Annotate live
Draw directly on the video. Annotations composite in real-time. Export clips or replay annotations frame-by-frame.
Built for visual analysis
Frequently asked questions
Does annotation add latency to the live stream?
No. Annotations render as a composited overlay at under 16ms (one frame at 60fps). The underlying stream is not re-encoded. Viewers see annotations in real-time.
Can multiple people annotate at the same time?
Yes. Up to 8 concurrent annotators with color-coded cursors. Each annotator gets their own layer. A producer can show/hide individual layers or merge them into the output.
Does Live Annotation work with replay and VOD?
Yes. Annotations are stored as time-coded vector data. They can be replayed on VOD content, exported as burned-in video, or shared as standalone overlay files.
What input devices are supported?
Live Annotation works with stylus/pen tablets (Wacom, Apple Pencil), touchscreens, and standard mouse input. Pressure sensitivity is supported on compatible devices.
Annotate your next broadcast
Start drawing on live video. Free trial.