How to Compress MP4 Files

By Andrew Schrader

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.

Step 1

Download, install and run QuickTime Player Pro.

Step 2

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

Step 3

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

Step 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.

Step 5

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

Step 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 & 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.