What is Aspect Ratio? The term Aspect Ratio refers to the relationship between the width and height of a video, which is expressed normally in the form of "width: height", for example, 4:3 or 16:9, and it is irrelevant to the actual physical size of the image.
The most common video aspect ratios are 4:3 (1.3:1) and 16:9 (1.78:1). The former is the standard TV format, while the latter is the latest widescreen TV format. Besides these two, 1:1 and 9:16 are getting popular on social media sharing nowadays.
To change the aspect ratio permanently, you need a video editor or converter. Here I humbly recommend Wondershare Filmora9 video editor (the latest version 9 of Filmora video editor, Windows 10 supported), which lets you create both 4:3, 16:9, 9:16 and 1:1 aspect ratio videos easily. You can share the created videos on Apple TV, YouTube, Vimeo and mobile devices conveniently.
Note: Since this video is made with previous Filmora9 version, I’ve updated the latest steps of the changing aspect ratio in Filmora9 below.
Part 2: How to Change Aspect Ratio in Filmora9
Method 1: Change aspect ratio at the Starting interface
The Filmora9 allows you to change the project aspect ratio after launching the video editor program. Click the drop-down menu and you will see the commonly used 16:9, 1:1, 9:16, 4:3 and 21:9 aspect ratios.
(Update to the latest Filmora9 version if you didn't see this option)
Method 2: Change Aspect Ratio under Project Settings
If you like, you could choose a target aspect ratio at the beginning after entering the main editing interface by clicking the Project Settings. It depends on the aspect ratio of your media source.
If most of your media source files are in 4:3 aspect ratio, you should select 4:3 standard aspect ratio. For you've select an aspect ratio, then the media files that are in 16:9 or other aspect ratio will be converted with black bar, and be stretched if necessary. This is the solution when aspect ratio discordance occurs. But if you just want to change aspect ratio of one video file, simply choose an aspect ratio and go.
If you want to change aspect ration later, just select Project Settings to change it again.
Method 3: Change Aspect Ratio during Editing
After importing video files into Filmora9 timeline, you can still change the aspect ratio at the Crop and Zoom tool.
Right click on cilp in timeline to select Crop and Zoom . Then a pop-up window will appear. By clicking manually, 16:9, 4:3, 1:1 and 9:16 at the bottom, you can change aspect ratio with these presets or click Custom to enter the aspect ratio manually. After selecting, click OK. Then you will find aspect ratio will change.
Optionally, you can edit and enhance your video with plenty of fitlers, overlays, visual effects, titles and all common video editing tools.
Method 4: Change Aspect Ratio at Exporting
Depending on your needs, you can either save your videos to computer for media player or mobile device, directly upload to YouTube, or burn to DVD for watching on standard or wide screen TV. To do so, click "Export" button when you are happy with your video.
Change aspect ratio for local computer
The first tab is "Local", which you can save video in specified aspect ratio to computer. Once a format is selected, all resolutions with different aspect ratios are available. Depending on the resolution, the output video aspect ratio is different. For example, 1280x720 is a 16:9 video, but 640x480 is a 4:3 video. Or input 480x480 to customize 1:1 video. You could calculate the aspect ratio yourself. Always change aspect ratio to the same with your choice at the beginning. Otherwise, black bars may be added.
Change aspect ratio for device
Switch to "Device" tab to save your video in formats that are compatible with all popular devices, including iPhone, iPod, iPad, PSP, etc. When you've chosen a device, all resolutions with optional aspect ratio will be given. Simply choose your favorite resolution from the list. The higher, the better video quality, but also larger file size.
Change aspect ratio for YouTube
Go to "YouTube" tab and type in your information before clicking the "Export" button. There is no need to select an aspect ratio for second time. Your videos will be directly uploaded to YouTube depending on your select at the beginning.
Change aspect ratio for DVD TV
It's easy to switch aspect ratio for TV between 4:3 and 16:9. When you're in the "DVD" tab, you'll see an aspect ratio option. Simply choose what you want depending on your TV's screen.
Above are the ways that I figured out on changing aspect ratio in Filmora9. Of course, there are many other free video editing software available for changing the video aspect ratio, share it on the comment below.
Liza Brown is a writer and a lover of all things video.
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