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  • Auto reframe video in 16:9, 1:1, 9:16, 4:3 or 21:9.
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  • Cross-platform supported - (Windows, Mac, iOS, Android)

Step-by-Step Guide on How To Resize Video in Davinci Resolve

James Hogan
James Hogan Originally published Oct 28, 24, updated Dec 10, 24

When editing videos, changing the aspect ratio is essential for different platforms like YouTube, Facebook, Pinterest, and Instagram. Videos vary in size and shape, so resizing is crucial to maintain quality and efficiency. Whether for business or personal projects, resizing saves time and money.

This guide will show you how to resize videos using DaVinci Resolve and Filmora Wondershare. Once you learn, it becomes as easy as a click. Let's dive in!

In this article

Part 1. How To Resize Video in Davinci Resolve

Davinci Resolve is a very powerful tool to edit videos. Let’s suppose, you have some videos shots and all the videos have different sizes, some of the videos fit in the timeline and some are out of the timeline. No matter, you are going to make a video on the same scale with the same size.

Resize the video can be done in three ways:

  1. Zoom in zoom out
  2. Cropping
  3. Retime and scaling

Method 1. Zoom in and Zoom out

First of all, select the videos in your timeline. You should stay in the middle of the frame to set it because it’s too wide. The timeline moves forward and backward. Let your video be 4k, go to the bottom-right corner and click on timeline format. Select timeline resolution, select ultra HD, or whatever you want from the drop-down list.

select the videos in your timeline

Go to the inspector from the up-right corner and select Transform under the video section. Here you can resize your image. Place the mouse over zoomx (Horizontal) and zoomy (vertical) values to drag left or right for zoom in or zoom out. The video can be resized accordingly.

Here you can also change its rotation.

change its rotation

Method 2. Cropping

Go to the inspector from the up-right corner and select Transform. Now choose Cropping. Here are four options Crop left, crop right, crop Bottom, and crop Top. You can drag the scale from left to right to adjust the crop settings according to the desired result.

choose Cropping

Method 3. Retime and scaling

Go to the inspector from the up-right corner and select retime and scaling. You can choose stretch, Fit, Fill, or crop for cropping the video from the drop-down list.

  • The Crop function is used to remove the unnecessary or uneven part of the video.
  • The Fit function is to have the video auto-center and the selected clips are formatted according to the screen dimensions.
  • Stretch Function allows changing the length of the certain clip at a certain duration.
select retime and scaling

After transforming, cropping, and resizing the videos, you can copy the same settings without repeating the above steps for each video.

Part 2. An Alternative Way To Resize Videos With Wondershare

Wondershare Filmora is an easy-to-use yet powerful video editor suitable for all creators, allowing you to effortlessly convert horizontal videos into vertical ones. Notably, Filmora not only has the Auto Reframe feature but also includes an advanced compression function, and it offers a method for manually adjusting video dimensions. Wondershare Filmora is a clear winner! Its advanced video compressor makes it incredibly easy to reduce file size without any loss of quality while ensuring that your videos meet the size requirements for social media uploads.

And if that’s not enough, Filmora also has an Auto Reframe feature, along with other ways to help reduce file size. You can adjust the video resolution, tweak the bitrate and frame rate, or cut the video length. Plus, it comes with advanced features to enhance your videos before sharing them on social media.

Plus, it’s incredibly fast, with compression speeds up to 47x faster! And the best part? If you’re reducing file sizes for YouTube uploads, you can use the recommended bitrate for the best possible quality.

And if that’s not enough, Filmora also has an Auto Reframe feature, along with other ways to help reduce file size. You can adjust the video resolution, tweak the bitrate and frame rate, or cut the video length. Plus, it comes with advanced features to enhance your videos before sharing them on social media.

Multiple Ways to Help Resize Your Videos
  • Auto reframe video in 16:9, 1:1, 9:16, 4:3 or 21:9.
  • Offers cool video effects and filters to make your video become professional.
  • Cross-platform supported - (Windows, Mac, iOS, Android).
  • Resize Your Videos Without Quality Loss.
box filmora

So, what are you waiting for? Give Filmora a try to reduce the size of your video files! Just follow this simple guide to get started:

Method 1: Using Advanced Video Compressor

Step1Launch Filmora and upload your video

If you haven’t downloaded Wondershare Filmora yet, you can grab the latest version here. After installing, just double-click the icon to open it. Once Filmora is open, start a new project and import your video from Google Drive or Dropbox, or simply drag and drop your videos into Filmora.

open fimora and import video
Step2Compress your video

Click "Export" at the top right, then choose your video compression mode: "By Quality" or "YouTube Upload".

choose compression mode

If you choose "By Quality", you can adjust the file size by selecting a quality level, from 10% to 90%. Meanwhile, if you choose "YouTube Upload", the video will automatically be compressed to the recommended bitrate for YouTube, which helps prevent blurriness when uploading.

selecting a quality level for compression
Step3Export your video

Choose the option that works best for you, and the tool will automatically compress your video. Once it’s done, just click "Export" to save your video with the smaller file size.

export your reduce file video

Method 2: Using Auto Reframe Feature

Step1Upload your video and access the Auto Reframe feature

After uploading your video to Filmora, go to Tools > Auto Reframe, or simply right-click the video in the media library and select Auto Reframe.

find auto reframe feature
Step2Adjust aspect ratio

In the pop up window, you’ll see several aspect ratio options like square (1:1), vertical (9:16), standard (4:3), widescreen (16:9), and cinema (21:9). Choose the one that will help reduce your video size. For example, if your video was originally widescreen (16:9), switching to a square (1:1) or vertical (9:16) aspect ratio can reduce the file size.

Once you’ve made your selection, click "Analysis" to let Filmora adjust the video accordingly.

change aspect ratio
Step3Review the preview and make any additional adjustments

Once you've set everything up and reframed your video, take a moment to preview it. If you need to make changes, just pause the video and drag the frame where you want it. Do this as needed. When you're satisfied with how it looks, click "Export" or "Add to Timeline" to save your changes.

review and export your video
Step4Change the dimensions when exporting

The above mentions changing the dimensions of a single video or multiple videos in the media library, but you can also directly export videos from the timeline, select "Auto Reframe," and modify the dimensions.

change the dimensions when exporting
icon note
Note: If you're not satisfied with the export settings, there's an option in the bottom left corner that allows you to revert to the last settings before export.
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Method 3: Use The Crop Tool

Step1Find the Crop tool

You can also reduce the size of your video by using the Crop tool to adjust the video dimensions. Just right-click on the video in the timeline and select the "Crop and Zoom" option.

find the crop tool
Step2Select aspect ratio

In the Crop and Zoom panel, you can adjust the crop area by choosing from the available ratio presets.

adjust aspect ratio
Step3Crop the video

To adjust the size and position, drag the crop box to choose the part of the video you want to keep. This will help resize your video and make the file smaller. When you're happy with it, click "Apply" to save your changes.

crop the video and apply changes

Method 4: Change Project Aspect Ratio

If you want a more straightforward approach, you can change the project aspect ratio. After importing your video to Filmora, click the Settings button and select "Change Project Aspect Ratio."

open video settings on filmora

Then, you'll get to change the aspect ratio as well as the resolution and frame rate.

change aspect ratio project settings

Part 3. Bonus Part: Use Smart Scene Cut highlight Your Video

Are you frustrated with videos being too long? Especially now, when people prefer watching videos on their phones, social media videos need to be high-quality and concise to attract viewers.

Don't worry, Filmora can help you with this issue. The Smart Scene Cut feature in Filmora can intelligently extract the highlights from your video without the need for manual editing. Below is a tutorial video for you to watch. 

Conclusion

At this time, every business is using marketing to boost the economy, but video marketing is at its climax. Therefore, it is essential to take advantage of video editing tools to increase productivity and efficiency of work.

The Davinci Resolve and Filmora Wonder Share are the best video editing tools to resize videos. You can easily use these tools on your laptop, tablet, or smartphone in a very short time. Along with this, you can share your compressed videos on different social media platforms like Facebook, Twitter, YouTube, Instagram, and LinkedIn. Moreover, you can enjoy the magical effects of these free tools at the ease of your smartphone. It is beneficial for both small and large businesses for the following

  • Time saver
  • Economical
  • Good video quality
  • Presentable
  • Increase engagement

Hope the content will be useful for you. If you like the article please leave a comment.

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James Hogan
James Hogan Dec 10, 24
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