How do I change the dimensions of a movie to make it larger?

How do I change the dimensions of a movie to make it larger?


I have a movie of my iPhone 8, and I want to increase the dimension but keep its proportion.

Mac mini, macOS High Sierra (10.13.6)

Posted on Sep 12, 2018 3:20 AM

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Posted on Sep 12, 2018 3:07 PM

So, you have (for example) a 720 x 1280 video in 9:16 aspect ratio that you want to change to 1080 x 1920 keeping the same aspect ratio. Is that essentially right?


I think you might be able to do that with the free download MPEG Streamclip. You can download it here:


http://www.squared5.com/svideo/mpeg-streamclip-mac.html


Open your movie in Streamclip and do a File/Export and select one of the options that display. In the export window that appears you will have several dimension options, including "custom". See if you can type in your 1080 x 1920 dimensions and export to that.


-- Rich

5 replies
Question marked as Top-ranking reply

Sep 12, 2018 3:07 PM in response to ShinehahGnolaum

So, you have (for example) a 720 x 1280 video in 9:16 aspect ratio that you want to change to 1080 x 1920 keeping the same aspect ratio. Is that essentially right?


I think you might be able to do that with the free download MPEG Streamclip. You can download it here:


http://www.squared5.com/svideo/mpeg-streamclip-mac.html


Open your movie in Streamclip and do a File/Export and select one of the options that display. In the export window that appears you will have several dimension options, including "custom". See if you can type in your 1080 x 1920 dimensions and export to that.


-- Rich

Sep 12, 2018 6:29 PM in response to ShinehahGnolaum

As I mentioned earlier, when you upscale a video the results are usually not satisfactory.


I have no knowledge whether there is any other software that can do what you want. I have never tried what you are endeavoring. There may be some. Perhaps it would be worthwhile to Goggle the question and see what you can come up with.


I don't know what settings you used in Streamclip, so can't comment there.


-- Rich

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How do I change the dimensions of a movie to make it larger?

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