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You can either find another MP4 player for Mac or you can convert your MP4 file to a different format that’s playable by QuickTime. When QuickTime Player lets you down, you have a few options.
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If QuickTime is not playing your video, it’s likely that it was encoded using a different standard. As a Mac MP4 player, QuickTime can only work with videos encoded with MPEG-2, MPEG-4, and H.264. The problem with QuickTime Player often comes up due to the difference in format encoding. The MP4 name comes from abbreviating MPEG-4 Part 14, which is based on the QuickTime File Format (QTFF). It’s also a popular online format that can be streamed directly by all browsers. MP4 is a multimedia container format that can be used to store video, audio, images, subtitles, and other metadata. To understand why it might be difficult for QuickTime to play MP4 on Mac, let’s quickly touch on what MP4 is. Why can't QuickTime Player open MP4 on Mac?
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