Now, the best solution to solve this issue is to convert all kinds of MP4 videos and movies to QuickTime more compatible formats. You will encounter a 'QuickTime Player can’t open this file' error message if you try to open MP4 files with incompatible codec in QuickTime player. QuickTime can only play MP4 files compressed with the codec of MPEG-2, MPEG-4, and H.264 codec.

Why Is QuickTime Not Playing/Recognizing an MP4 File?Īs we know, MP4 is a complex video container with various different video and audio codecs. It is recommended that you understand why QuickTime can’t play MP4 before solving this issue. QuickTime converter can help you convert MP4 to MOV and vice versa and then you can watch this video in QuickTime again. She received the following error message:ĭon’t worry if you encounter this problem. But, my best friend couldn't play it on her Mac computer with QuickTime.

Below is a true example: I created an MP4 movie with my own pictures and videos, I played it in my Windows 10 very well. However, sometimes, you will find QuickTime can't open and play MP4 video file.

It supports many formats such as QuickTime movie files (MOV), most MPEG-4 files (MP4, M4V, M4A, MP3), MPEG-2, and others. QuickTime Player, a free multimedia player, is currently available on Mac OS X Snow Leopard and newer. What should you do when QuickTime can’t open MP4 files? How to convert MOV to MP4 free? Whether you just want to convert MP4 to MOV files or want to convert QuickTime to MP4, you can try QuickTime converters, for instance, MiniTool MovieMaker. This post shows how to convert video to QuickTime and vice versa. QuickTime can’t open and play MP4? MOV can’t be played on Windows Media Player? This post lists QuickTime converters to help you convert MP4 to QuickTime as well as convert QuickTime to Windows Media Player, and shows the difference between MP4 and MOV.

Windows 10 convert mov to mp4