

To resolve this issue, try VLC media player.

MP4 is a container that contains various kinds of data, so when there is a problem opening the file, it usually means that data in the container (an audio or video codec) is not compatible with the device’s OS. Click the Choose Files button to upload your files Select a target video format from the Convert To drop-down list Click on the blue Convert button to start the conversion Convert Any Video Convert more than 60 video formats to popular video extensions such as MP4, MKV, WebM, AVI, and more. On some devices, particularly mobile, opening this file type can be problematic. You can also convert movies to MP4 using a desktop video converter this option is more suitable if you have large files for conversion. However, a regular online converter to MP4 can normally process only small files. On Windows, it opens in Windows Media Player. One one of the ways is to use an online video-to-MP4 converter, like the one at the top of this page.

There is no need for third-party software. Simply double-clicking the file opens it. MP4 files open in the operating system's default video player. Many consider MP4 to be one of the best video formats available today. It is also a popular video format for streaming over the Internet, such as on YouTube. Select the Always use the selected program to open this kind of file check box. In the Open With dialog box, click the program whith which you want the file to open, or click Browse to locate the program that you want. It is compatible with a wide range of devices and operating systems, using a codec to compress file size, resulting in a file that is easy to manage and store. To change file associations: Right-click a file with the extension whose association you want to change, and then click Open With. MPEG-4 (MP4) is a container video format that can store multimedia data, usually audio and video.
