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How to compress MP4 files

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.

Download and install QuickTime Player.

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

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

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.

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

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

Tip

To compress your MP4 even more, try lowering your data rate from 64KBITS/sec to 32KBITS/sec.

Warning

Compressing your MP4 files will result in loss of audio/video quality.

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About the Author

Andrew Schrader has been a professional writer and filmmaker since 2004. He works as a writer and director, holding a Bachelor of Arts in film and media studies from UC Santa Barbara. Schrader specializes in writing about technology and computer software.