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Filmora Video Editor
Easiest way to blur out objects or moving faces in videos with one click
  • Customizable mosaic area, position and percentage
  • Advanced power tool to make tilt shift or face off effect
  • Background blurring effect for decorating black bars in portrait videos/photos

How to Add Mosaic/Censor Effect in iMovie

Aug 31, 2020• Proven solutions

The mosaic of video helps to replace the memory consuming videos with still images that contain complete information with less bandwidth and small saving time as well as size. One of the best software to create such mosaics is iMovie platform as it consists of all easy to use tools. In this article, we will show you how to add a mosaic effect or the censor effect to your video footage with iMovie.

Part 1: How to add mosaic using iMovie alternative for Windows and Mac?

If you are not able to use iMovie due to its complicated interface and compatibility issues, then here is one more useful software tool for you. Wondershare Filmora9 can help you in the creation of beautiful mosaics within very less time due to its easy to use interface. The best thing to know about Wondershare Filmora9 is that it can support all major video file formats, and users can download the trial version of this software for free from the official website. Wondershare Filmora9 is one of the best solutions for beginners and can produce beautiful results within less time. Let's check the tutorial below to find out how to add a mosaic effect in Filmora9.

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Related: Why Should You Use iMovie Alternative Filmora9 to Edit Videos?

So, if you are a Mac user, you can add a mosaic effect to your video easily with Filmora9. If you want to replace the face in the video, I recommend you try the Face-off effect under Utility, which will detect the face and replace it with the presets you selected automatically. Check to learn more details about Face Replacement in Video.

    • After importing your video clips to the timeline, place the Playhead to the point that you want to add a mosaic effect.
    • Go to the Effect tab, scroll down to Utility category, and then drag the Mosaic effect to the track above the video.

iMovie Alternative Filmora9 Add mosaic to video

    • Adjust the duration of the mosaic effect by dragging the edge. Double click the mosaic effect in the timeline, and then you can change the mosaic type, intensity, and opacity accordingly.

iMovie Alternative Filmora9 Add mosaic to video - adjust

  • Move the mosaic area to the desired position or adjust the frame border to adjust the size in the preview window.

That's how you can add a mosaic effect to the iMovie alternative Filmora9. If you are looking for more alternatives to iMovie, then you should not miss Best iMovie Alternatives for Windows and Get Best iMovie Alternatives for Mac.

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Part 2: How to add mosaic (blur objects) in iMovie?

We have explained How to Blur Faces in iMovie previous, and you can learn the detailed information at Here. While in this article, we will show you how to add mosaic or the censor effect with iMovie in ways.

1. Basic Mosaic Effects

If you want to add a basic mosaic effect, you can drag a black bar image onto your footage and merge it anywhere on your timeline. As soon as you place it to the timeline and select "Picture in Picture", the black bar will start appearing on your video screen, and you can drag it anywhere as well as can resize it as per need. This is all about basic mosaic addition but if you are thinking to use advanced tricks then you have to follow the process in Section 2.

Filmora Mosaic Effect

Related: How to Use Picture in Picture Effect in iMovie

2. Advanced Mosaic Effects

  • Another way to add a mosaic effect in iMovie is to use a low resolution video exported from the original one through the "Export using QuickTime" option in the Share menu. In order to get a better mosaic effect, you can adjust the size for pixels in "Export Size Settings" to smaller-scale manually.

Filmora Mosaic Effect

  • Now import this low resolution file to iMovie and create a low range copy for your original video; once you drag the low pixel clip to the timeline and select “Picture in Picture”, it will start appearing on your preview window.
  • Crop the low pixel added movie and then place the cropped part anywhere on your project as per need. It can be applied on a movie clip of any size and resolution level without any trouble.

Related: How to Crop and Rotate Videos iMovie

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FAQs About Adding Mosaic and Censor Effect in iMovie?

1.  How to censor videos in iMovie?

iMovie doesn’t offer a simple way to blur objects or faces and it has no movement tracking capabilities. However, you can still use this video editor to cover a face or a license plate in iMovie, although this process can get difficult if the object you are trying to cover is moving. In addition, you can use iMovie’s audio editing options to censor the strong language in your video.

2.  How to add a censor bar in iMovie?

Place a monochrome black image over the video clip you would like to censor then choose the Picture in Picture option from the Video Overlay menu. The black bar will appear in the Preview Window and you can resize and reposition it as you wish. 

3.   How to beep out words in iMovie?

Even though iMovie doesn’t offer audio effects that enable you to censor strong language in a video you can still use this video editing software to beep out words. However, you will need an audio file that contains the beep sound in order to cover inappropriate language. Use iMovie’s cutting tool to remove the part of the audio file you want to censor and replace it with the audio file that contains the beep sound.

4.  How to blur a license plate in iMovie?

The only way to blur a license plate in iMovie is to create a low resolution of the entire video clip, and then use the Picture in Picture effect to cover a license plate. However, performing this task becomes very difficult if the license plate you’re trying to cover is moving throughout the shot since you will have to change the position of the overlaying image in each frame. 

Liza Brown
Liza Brown is a writer and a lover of all things video.