How to Lock a Timeline Region in Kdenlive

When editing complex video projects in Kdenlive, accidentally moving, cutting, or deleting clips in a completed section can disrupt your entire workflow. While Kdenlive does not feature a single-click “global zone lock” button to freeze a specific time range across all tracks, you can easily protect a specific region from accidental edits by locking individual clips, locking entire tracks, or grouping media. This guide covers the most direct methods to secure your media in a targeted area of the timeline.

Method 1: Lock Individual Clips in the Target Region

The most precise way to protect a specific region is to lock the clips located within that time zone. This prevents them from being moved, trimmed, cut, or deleted, while leaving the rest of the timeline free for editing.

  1. Select the clips: In your timeline, click and drag to draw a selection box over all the clips in the region you want to lock. Alternatively, hold Shift and click each clip to select multiple items.
  2. Lock the selection: Right-click on any of the selected clips and select Lock Clip from the context menu.
  3. Verify the lock: A padlock icon will appear on the locked clips, indicating they are now frozen in place. To unlock them later, right-click the clip again and uncheck Lock Clip.

Method 2: Lock the Track Headers

If the region you want to protect occupies entire tracks, you can lock the tracks themselves. This is highly effective if you organize your timeline chronologically or keep finished segments on dedicated tracks.

  1. Locate the track header on the far left of the timeline for the track you want to protect.
  2. Click the Padlock icon next to the track name.
  3. Once locked, the track will gray out slightly, and no clips on that track can be modified. Click the padlock icon again to unlock it when you need to make changes.

Method 3: Group Clips to Prevent Misalignment

If you still want to edit the clips in a specific zone but want to ensure they do not lose their relative positions to one another, you can group them.

  1. Highlight all the clips within the target region.
  2. Right-click the selection and choose Group Clips (or press the keyboard shortcut Ctrl + G).
  3. The clips will now behave as a single unit. If you accidentally drag one, the entire group moves together, preventing gaps or sync issues within that specific zone.