Categories: macOS

Trimming Videos in QuickTime Player

I recently created a 10.31GB video in macOS. I wanted to trim the .mov file using QuickTime Player Version 10.5 (1110.4.21). Unfortunately, the Trim… command in the Edit menu was disabled. I dug around with trim quicktime video – Search (bing.com) and enable trim quicktime – Search (bing.com) finding unhelpful articles like Trim a movie or clip in QuickTime Player on Mac – Apple Support and Quicktime 10 Won’t Allow Me To Trim An MP4 – Apple Community. The solution finally came from Trim QuickTime Video Mac & Solve QuickTime Can’t Trim Video (macxdvd.com):

  1. Close the .mov file in QuickTime or any other media players.
  2. Locate the .mov file in Finder and right click on it.
  3. Select the “Encode Selected Video Files” command. A popup is displayed prompting you to select encoding settings.
  4. Select the resolution (e.g. 1080p) and encode the video.
  5. The encoding process proceeds in the background with a new file created and whose size can be seen to be increasing with time by refreshing the Finder window.

I opened Activity Monitor to see which processes were involved. avconvert was the top one. So apparently, I could have done this from the command line myself!

avconvert -s myvideo.mov -o trimmedVideo.mov -p Preset1920x1080 --start 0 --duration 5827 --disableMetadataFilter

This command takes about 42 minutes to trim my video on my M1.

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