How to compress MP4 files

Written by andrew schrader Google
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How to compress MP4 files
You can compress MP4 files. (Ryan McVay/Photodisc/Getty Images)

MP4 files can come with a number of different formatting options to help compress video. You may have MP4 files that are simply too large to upload to the Internet to sites like YouTube. Since MPEG-4s (MP4s) are a standard for QuickTime technology, QuickTime Player allows a number of options when compressing and exporting MP4s to achieve smaller file sizes.

Skill level:


  1. 1

    Download and install QuickTime Player.

  2. 2

    Click "File" and "Open File" to locate your MP4 in the menu window and open the file in QuickTime.

  3. 3

    Click "File" and select "Export" to enter the "Save Exported File As" menu. Choose "Movie to MPEG-4" in the "Export" menu bar.

  4. 4

    Click "Options." Change your file format (at the top of the "Export Settings" window) to "MP4" instead of "MP4 (ISMA)." This will cut the file size roughly in half.

  5. 5

    Change your "Video Format" to "MPEG-4 Basic." Choose your "Image Size" and click "OK."

  6. 6

    Rename your file, if desired, and click "Save" to begin the compression. This may take several minutes depending on your file's size.

Tips and warnings

  • To compress your MP4 even more, try lowering your data rate from 64KBITS/sec to 32KBITS/sec.
  • Compressing your MP4 files will result in loss of audio/video quality.

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