How does one remove a black border around a video. The input video has the size 720x576 and has the output video should be 720x480. I need to crop away 96 pixels from top and bottom.

I have gazed through this list of video tools for Mac, but I'm unsure which tools can do this. I have tried MPEG Streamclip and avidemux2, but they doesn't seem capable of it.

Preferable a free tool.


Aha, in MPEG Streamclip if you select Export as mp4, there is a crop checkbox and some textfields where you can type in the number of pixels to be cropped.


If you are using MacBook or iMac the best app is iMovie.

  1. Create new project in iMovie
  2. Import video to iMovie and then drag and drop it in your new project
  3. Select you video in project and use crop button in preview window
  4. Export your new video and use it

If it is a large file that you need a small part of then first trim the video by pressing command+t when the file is opened in quicktime. Import time to iMovie will decrease by a lot

  • Welcome to Ask Different! Can you add more detail to this answer? How do you crop a movie using iMovie? Please take a look at the FAQs for more info. Thanks. – Nathan Greenstein Dec 8 '11 at 14:57
  • 1- Create new project in iMovie. 2- Import video to iMovie and then drag and drop it in your new project. 3- select you video in project and use crop button in preview window. 4- export your new video and use it. – Siamak Hejazi Dec 9 '11 at 7:04
  • 4
    Yeah, iMovie is great if you want to spend 15 minutes waiting for it to generate thumbnails across a 30 minute movie that you only want to extract 30 seconds from. – Mike Ruhlin May 24 '12 at 3:53
  • 4
    In my case with iMovie 10.1.1, the crop tool won't let you change the aspect ratio - ie. if you want to remove 10% from the top, it'll also remove 10% from the side. Please post if you know a way around that. – Demis May 2 '16 at 23:34
  • 1
    Unfortunately, iMovie ONLY lets you work in 16:9 now. – Zach Nov 26 '17 at 17:42

It's kind of hacky, and probably not the best answer but works if you don't want to download any other tools and just use quicktime, and since I love hacks...

  1. Open video in Quicktime.
  2. Select new screen recording from file menu.
  3. Setup audio source to be built in input from the arrow next to the record button.
  4. After pressing the record button, Select the area you want to record (instead of doing full screen) in the original video.
  5. Start the recording.
  6. Start the original movie playback.
  7. When original movie finishes stop the recording by clicking the Stop button in the menu bar.
  • 2
    So I took a screen recording of a screen recording today. I don't get why Quicktime doesn't support cropping natively. – Sirens Aug 11 '17 at 6:32

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protected by Daniel Mar 6 '12 at 18:37

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