Best video compressor for mac to reduce the file size of video?

A practical way to How to reduce video file size on Mac is to use MP4Box for MP4 container-level optimization, such as removing unnecessary tracks or reorganizing an existing file. Keep in mind that it does not re-encode the video, so it will not dramatically shrink a large video by lowering its resolution or bitrate.

How to How to reduce video file size on Mac

Step 1: Install GPAC on your Mac so the MP4Box command is available. If you use Homebrew, open Terminal and run:

brew install gpac

Step 2: Open Terminal and check the tracks inside your MP4 file:

MP4Box -info input.mp4

Review the listed video, audio, subtitle, and other tracks before deciding what can be removed.

Step 3: If the file contains an unnecessary track, identify its track ID from the previous command. For example, to remove track ID 3 while creating a new file, run:

MP4Box -rem 3 input.mp4 -out smaller.mp4

Step 4: To reorganize an MP4 file for more efficient playback without changing its encoded video quality, run:

MP4Box -inter 500 input.mp4 -out optimized.mp4

Step 5: Compare the original and output file sizes in Finder and play the new file to make sure the video, audio, and any subtitles you need are still present.

This method is most useful when unnecessary tracks or container overhead are contributing to the file size. For substantial compression, such as reducing bitrate or resolution, a video encoder is required because container optimization alone usually produces only a modest size reduction.