How to extract clips from security camera footage

Common security camera formats

The challenge with long recordings

Scrubbing through a 4-hour recording to find a 30-second incident is slow with most video tools. The timeline scrubber moves coarsely, seeking to a random point in a long file is slow, and you may not know the exact timestamp of the incident.

Use the timeline zoom in Lossless Video Cutter to narrow the view to a small window around your approximate time. Once zoomed in, arrow key navigation moves frame by frame so you can locate the exact moment.

Step-by-step: extract an incident clip

1. Open the recording with ⌘O or drag it into the app.
2. Navigate to the approximate time of the incident using the timeline scrubber. If you know the timestamp from your NVR system, type it directly into the time field.
3. Zoom the timeline in to get frame-level precision around the incident.
4. Use arrow keys to navigate frame by frame to the exact start of the incident.
5. Press I to set the in-point. The app snaps to the nearest keyframe.
6. Navigate to the end of the incident and press O.
7. Export with ⌘E. The output contains only the marked segment - original quality, no re-encode.

Using object detection to find incidents faster

If you are looking for a specific type of event - a person entering a restricted area, a vehicle in a parking lot, an object left behind - use Find Object. Describe what you are looking for in plain language and the app scans the recording for frames that match.

Results are shown as markers on the timeline. Click any result to jump directly to that frame. This turns a 4-hour scrub into a 2-minute scan.

Multiple incidents in one recording

If there are multiple incidents in the same recording, mark all the segments you want to extract before exporting. Set in/out points for the first incident, then navigate to the next and add it to the selection. When you export, choose to export as separate files - one file per marked segment - to get individual clips for each incident.

Each exported file is named with the segment number and time offset so you can easily identify which clip corresponds to which incident.

File size note

The exported file contains only the video data from the marked segment. A 10-minute clip extracted from a 4-hour recording will be roughly 1/24 of the original file size - no re-encoding required, just fewer packets in the output container.

This makes it practical to extract and share clips via email or messaging without any additional compression step.