I've got about 112 videos, each ~240MB. All of them are in 16:9 and I'd like to change them to 4:3.

What's the most nonresource-intensive and convenient way I can accomplish this without losing any quality?

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  • I believe Handbrake can do this handbrake.fr – spikey_richie Sep 21 '18 at 6:53
  • @spikey_richie Thanks. Does handbrake keep all the settings on default so the video will remain exactly the same except with the aspect ratio changed? – Red Sep 21 '18 at 7:08
  • You'll need to have a play, it's a while since I used it. – spikey_richie Sep 21 '18 at 8:40
  • Handbrake is simply a GUI/wrapper for FFMPEG. You still have to set up the options and configurations. – music2myear Sep 24 '18 at 22:21

You can use ffmpeg.

ffmpeg -i <input, use a glob> -vf scale=<resolutionx>x<resolutiony>,setdar=16:9

A single command should do it.


Most video converters will stretch the image vertically. You will need to find one that will convert the 16:9 video so it is minimized and has black borders on top and bottom, or people are going to appear elongated.

For a list of converters, see the article Best Free Audio-Video Format Conversion Program.

You will just have to experiment until you find a converter that does it correctly.

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