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How to Change aspect Ratio of Video?

Liza Brown
Liza Brown
Originally published Apr 07, 22, updated Dec 05, 23
Versatile Video Editor - Wondershare Filmora

Videos are a great way to complete the whole story in one go. In social media, videography, entertainment, educational video sharing, or many more areas, viewers and their viewing experience matter a lot. For instance, if a person visited YouTube to see some educational content but finds it out that the overall view of the video content is not up to the mark. Then, what will happen? That person will switch to another channel, which is not good for your business area. Thus, knowing the correct aspect ratio for your video is very important. Here, the aspect ratio refers to the ratio of width to the height of the Video or image visible on the screen. So, here you will learn about ways to change the ratio of a video and how to change video dimensions on premiere pro or iOS devices.

aspect ratio of video

 Part 1 Change aspect Ratio with Softwares

1.1 For beginners & most people

This part is for beginners or people who are not aware of the technicalities related to video size, dimensions, or changing the ratio of Video. A quick and easy-to-use application is Wondershare Filmora, one of the widely used platforms for video editing and adopting it s per the video requirement.

Thus, let's try to understand how you can change the Video's aspect ratio using Filmora.

Step1 Download and open the Software

First, visit the official link of Wondershare Filmora and download, install and lunch the tool on your system.

Step2 Set the aspect ratio and upload your file

Right from the main interface, you will find the aspect ratio option. Using the drop-down menu, select the desired one to change the ratio of Video. After that, click on the new project to upload your video file.

Step3 Save and Export

Now, when you upload the video file, it will automatically modify the chosen aspect ratio for the video. Then export the file to save at the desired location on your system.

save and export

1.2 For Professional People

Now, here comes the guidance to those professional videographers, movie maker who needs an advanced version to change video size or aspect ratio.

Since you are already aware of technicalities to a certain extent, it becomes easy to use some advanced tools to change the aspect ratio of Video using adobe and OBS Software.

● Adobe PR

The first tool that we shall discuss is Adobe PR, and we will learn how to use Adobe Premiere Pro to change the Video's aspect ratio. This tool is valuable for worldwide users explicitly working in the video editing field or dedicated professionals who need some technical knowledge to understand the interface. Here are the required steps to handle the adobe PR to change aspect Ratio iPhone Video devices.

Open the 'File' Menu> then Go to the 'New' Folder > after that, visit the 'Sequence' (dialog box) That will give the option of 'Settings,' select it> then visit the 'Video' section. Then, from the Video section, you need to adjust the Frame size for height and the Horizontal value for width.

Then opt for 'OK.'

● OBS Studio

Those who know are pretty aware of the professional OBS studio full of features and technical detailing. In this part, you shall see how to use OBS software to change the iMovie aspect ratio following the mentioned steps.

Here, you need to open the 'Settings .' Under the 'Video' subsection, you will see 'Output Resolution' (click on drop-down), then from the given aspect ratios, change the ratio of your Video. Then, press the OK button to apply the changes at the end. That's it.

Using this professional software will make you able to change the aspect ratio on iPhone Video and change the aspect ratio MP4, MKV, FLV, or other formats. The only need is to have a basic understanding of the technical knowledge related to the software. If you're already a professional video maker, this software will be the most option.

 Part 2 Change Video aspect Ratio Online

Till now, we have covered different software as per the user requirements. Suppose you are not comfortable with downloading any software on your devices. In that case, there are some alternatives for Online Video Editors to change video aspect ratio with ease. Let's take a look over some of the easy-to-use online tools to change the ratio of the Video. Such tools are quick to use and accessible worldwide. Some of them are mentioned below:


You can effortlessly change the aspect ratio of your video using ‘’. Which supports multiple video formats such as .wmv, .mp4, .mkv, .flv, .3gp and many more. While uploading the video, you need to mention the required width and height of the video and then click on the ‘Resize’ button.

2. Kapwing (

Another helpful tool while searching for some quick tools to change the ratio of Video through online mode is Kapwing Online Convertor. You can scale, resize your Video by simply uploading your file or pasting the URL there. The interface is quite simple to use and changes the aspect ratio of MP4 or other format videosThere is noNo doubt accessing some online tools to change the Video's aspect ratio in quick and easy steps. Though there exist certain limitations such as internet connection speed should be good to upload or download the Video. In addition, there is a certain limitation in terms of the size of the Video or other factors. Otherwise, it comes out to be a practical option for small files.

 Part 3 Make sure which aspect Ratio You Want to Change

Technical specifications needed by different online platforms are different, such as YouTube, Instagram, Facebook, or other social media platform that needed a video with different aspect ratios to make them suitable s per their criteria. Thus, accordingly, you need to modify or change the aspect ratio on MP4 as per these social media requirements. Here are some famous social media platforms, and their aspect ratio requirements are listed. Let's check them out one by one:

Twitter: The aspect ratio range that works for Twitter is between 1.1 to 2.1

Instagram: For it, the standard ratios are: 1.91:1, 4:5

Tiktok: Required ratio is 9:16 (Smartphone screen)

YouTube: Standard aspect Ratio for YouTube is 16:9. If the video uploaded is not in this ratio, then YouTube will make an internal adjustment and show the video with an outer band of the black or white strip around the video screen.

Vimeo: Both the options are available with Vimeo that is 16:9, 4:3

Wondershare Filmora

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Getting the correct information about the iMovie aspect ratio change and Adobe premiere pro-change aspect ratio is crucial to uplift the viewer base to your Video. Furthermore, to a great extent, it matters which platform your Video will launch on as different devices need different aspect ratios. Thus, this article focused on covering all the points covered under how to change the Aspect Ratio of MP4 videos. Thus, whether you are a novice in video making or a professional videographer, or a moviemaker, learn about changing the ratio of Video to open new vistas to your efforts with Wondershare Filmora, Adobe, and OBS web applications.

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