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Lock & Load + LumaFusion Docs

Lock and Load for Lumafusion 3.0 Quickstart:

Access Lock and Load stabiliser by double clicking on the clip then selecting the stabilise icon. Choose one of the stabilise presets, if your footage is shot on a DSLR with noticeable rolling shutter artefacts then choose one of the “+ shutter” presets.

Tracking of the clips movement will begin automatically, and will return to the timeline when complete. You can immediately play the clip to see the result.

Double tap the clip on the timeline to open the clip editor and adjust parameters to refine the result if needed. In many cases the default parameters will give good results without needing any changes.

 Detailed Usage: Rolling Shutter Reduction

Lock & Load includes an option to reduce Rolling Shutter CMOS artefacts integrated with the stabilization process. Rolling Shutter artefacts occur because of the camera sampling different parts of the image at different times in a pattern from top to bottom. They include skewing and visible vertical distortion.

 Lock & Load can help to reduce these artefacts by correcting for the visible skewing and vertical stretching that can occur.

 Apply one of the “+ shutter” presets when selecting stabilization. Alternatively turn on shutter reduction manually with the toggle, no other steps are needed.

The clip is analysed for rolling shutter strength and then rolling shutter reduction is automatically applied, just play your clip to preview the results.

Stabilisation Parameters:

If you are not happy with the default results then you can change various parameters to refine the result.


Overall Strength is the main parameter and lets you control the strength of stabilization for all directions at once. The lowest value zero means no stabilization, while the maximum value corresponds to maximum stabilization or smoothness.


Under Advanced Strength there are separate sliders for “Horizontal”, “Vertical”, “Rotation” and “Zoom” . By default, all directions except for Zoom (or motion in z direction) are enabled, and you will rarely need to change this.

Advanced Scale:

p>In order to smooth the motion Lock & Load needs to reposition the source footage which of course leads to black on the edges of the image. The normal method of correcting this is to scale the image slightly, depending on the amount of motion at that time.

Lock & Load provides a smart mechanism for adaptive scaling and direct control over-scaling. These options can be chosen from the toggle menu "Scale Mode".

Lock & Load’s smart scaling mechanism computes the necessary scaling to cover the margins on a frame by frame basis but also takes care to keep the scaling speed as low as specified. Parts of your footage which require only a small amount of scaling are only scaled up by small amounts thus preserving image quality. Further, you can specify the maximum allowable speed of zoom changes. If you specify zero, a constant zoom is applied over the whole period. For values greater than zero the zoom can vary over time.

If you need direct control over Scaling, you can choose Fixed Scaling and adjust the desired zoom manually.

Recommended Approach:

Video stabilization is a compromise between smoothness and image quality. The stronger the stabilization, the more black that is revealed at the edge of frame. Filling the margins requires scaling, which in turn degrades image quality.

With this in mind, use the following rule of thumb: Keep the strength of stabilization only as large as necessary to yield a smooth video. While adjusting these parameters, play the preview to see immediately how they affect the result. Unless you have good reasons to use "Fixed Scaling", choose "Smart Scaling" to allow Lock & Load to apply adaptively as low scaling as possible. Next, consider if you can afford a margin (e.g. action safe or title safe), the more margin you allow, the better.

Finally, adjust "Max Scaling Speed". Start with large values and move to smaller ones until zoom variations are in an acceptable range.

Please note that Lock & Load does not remove motion blur from the footage, so a clip that is successfully stabilised may have sudden “flaring” artefacts where it blurs in one direction from where the camera was shaking. The only real solution to this is to shoot with a faster shutter which will minimize this effect.

Contact us at with any information, or to gain additional help.

Support Options:

You can post support questions to the CoreMelt user forum or use the contact form on the CoreMelt website. Please look in the forum before posting questions to see if your question has already been answered.

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