So I have a simple task that I do a lot: trimming a video's head and tail off. On Windows, I open the photo, click edit, drag the bars to where I would like to cut, and I save. It will save as mp4 and I can overwrite the video by selecting the original video before saving (giving the new video the same name). However, on mac, it's not so easy.

Method 1: Quicktime -- Open the MP4 video in Quicktime, trim it using an ios-like interface, and save the video as a MOV (no option to overwrite or to save as MP4). Import this MOV into Premiere Rush (which takes a long time to launch and is slow), tell premiere to export to mp4, and wait a minute. Then delete the original mp4 and the mov, and I've finally got the trimmed mp4.

Method 2: VLC -- https://www.videoproc.com/troubleshoot-vlc/cut-or-trim-video-in-vlc-on-mac.htm It's clunky, but faster than Quicktime and better suited to my needs. One downside is that I cant tweak the start point once I start recording, I cant see ahead and if it goes too far ill have to trim it a second time, and there are pauses at the beginning and end.

Method 3: iMovie -- this is my go-to method for splicing clips together and complex trimming (removing segments in the middle). However, it's slow to export and about as slow as the Quicktime method.

I after researching, I could not find one app that trims as easily as Windows Video Player. I am asking the community if there is a simple, Quicktime-like video trimmer for mac that exports in MP4 instead of MOV. I am working with files that are usually 2-3 GB and therefore try to stay away from online services as much as possible (hence why I don't use cloud convert for mov to mp4).

Edit: It needs to be free.

  • Please don’t add answers to the question itself.
    – nohillside
    Jul 27 '21 at 17:47
  • @nohillside how do I add my new solution for others who may benefit from it? Do I make a new Q/A (self-answered) question?
    – anonymous
    Jul 27 '21 at 19:03
  • The LosslesCut solution is already posted below, the QuickTime solution would make a good answer on apple.stackexchange.com/questions/117306/…
    – nohillside
    Jul 27 '21 at 19:06
  • @nohillside do you mean my QuickLook answer? And I don't think Quick Look is lossless, its just quick.
    – anonymous
    Jul 27 '21 at 19:09
  • 1
    If it's quick is most likely lossless
    – nohillside
    Jul 27 '21 at 19:11

LosslessCut is free and meets these criteria.

You can download it here:


I recommend choosing the LosslessCut-mac.pkg file from the latest version available.

One thing to note is that mp4s cannot be cut anywhere but there are “key frames” which are where cuts can be done. Otherwise you risk audio/video being out of sync.

  • That's perfect! I love it!
    – anonymous
    Jul 21 '21 at 20:08
  • 1
    @anonymous this is literally the second answer of the duplicate question. Please, pretty please, look a bit further the next time. It will help you (you'll get an answer quicker) and it will keep this site organised and maintainable. Jul 21 '21 at 21:14
  • @SaaruLindestøkke oh, sorry.
    – anonymous
    Jul 21 '21 at 21:41
  • Ironically, I'm the person who asked the duplicate question :-)
    – TJ Luoma
    Jul 22 '21 at 2:02

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